74HCT221 Dual non-retriggerable monostable multivibrator with reset Rev. 3 — 26 October 2016 Product data sheet 1. General description The 74HCT221 is a dual non-retriggerable monostable multivibrator. Each multivibrator features edge-triggered inputs (nA and nB), either of which can be used as an enable input. Pulse triggering occurs at a particular voltage level and is not directly related to the transition time of the input pulse. Schmitt-trigger input circuitry for the nB inputs allow jitter-free triggering from inputs with slow transition rates, providing the circuit with excellent noise immunity. Once triggered, the outputs (nQ, nQ) are independent of further transitions of nA and nB inputs. The output pulse width is defined by the following relationship: t = 0.7  C  R The output pulses can be terminated by the active W EXT EXT LOW reset inputs (nRD). Pulse width stability is achieved through internal compensation and is virtually independent of V and temperature. In most applications pulse stability CC will only be limited by the accuracy of the external timing components. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of V . CC 2. Features and benefits  Input levels: For 74HCT221: TTL level  Pulse width variance is typically less than 5%  Direct reset terminates output pulse  Schmitt-trigger action on nB inputs  ESD protection: HBMJESD22-A114F exceeds2000V MMJESD22-A115-A exceeds200V  Specified from 40Cto+85C and from 40Cto+125C 3. Ordering information Table 1. Ordering info rmation Type number Package Temperature range Name Description Version 74HCT221D 40C to +125C SO16 plastic small outline package; 16leads; bodywidth3.9mm SOT109-1

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 4. Functional diagram (cid:20)(cid:23) (cid:20)(cid:38)(cid:40)(cid:59)(cid:55) (cid:20)(cid:24) (cid:20)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:54) (cid:20)(cid:22) (cid:52) (cid:20)(cid:52) (cid:20) (cid:20)(cid:36) (cid:55) (cid:23) (cid:52) (cid:20)(cid:52) (cid:21) (cid:20)(cid:37) (cid:53)(cid:39) (cid:22) (cid:20)(cid:53)(cid:39) (cid:25) (cid:21)(cid:38)(cid:40)(cid:59)(cid:55) (cid:26) (cid:21)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:54) (cid:24) (cid:52) (cid:21)(cid:52) (cid:28) (cid:21)(cid:36) (cid:55) (cid:20)(cid:21) (cid:20)(cid:19) (cid:52) (cid:21)(cid:52) (cid:21)(cid:37) (cid:53)(cid:39) (cid:20)(cid:20) (cid:21)(cid:53)(cid:39) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:23) Fig 1. Functional diagram (cid:20)(cid:23) (cid:38)(cid:59) (cid:20)(cid:24) (cid:53)(cid:38)(cid:59) (cid:20)(cid:22) (cid:20) (cid:9) (cid:21) (cid:20)(cid:38)(cid:40)(cid:59)(cid:55) (cid:20)(cid:23) (cid:23) (cid:21)(cid:38)(cid:40)(cid:59)(cid:55) (cid:25) (cid:22) (cid:20)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:20)(cid:24) (cid:53) (cid:21)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:26) (cid:25) (cid:54) (cid:38)(cid:59) (cid:20)(cid:52) (cid:20)(cid:22) (cid:20) (cid:20)(cid:36) (cid:52) (cid:21)(cid:52) (cid:24) (cid:26) (cid:53)(cid:38)(cid:59) (cid:24) (cid:28) (cid:21)(cid:36) (cid:55) (cid:28) (cid:9) (cid:20)(cid:52) (cid:23) (cid:20)(cid:19) (cid:21) (cid:20)(cid:37) (cid:52) (cid:21)(cid:52) (cid:20)(cid:21) (cid:20)(cid:21) (cid:20)(cid:19) (cid:21)(cid:37) (cid:53)(cid:39) (cid:20)(cid:20) (cid:22) (cid:20)(cid:53)(cid:39) (cid:53) (cid:20)(cid:20) (cid:21)(cid:53)(cid:39) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:24) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:25) Fig 2. Logic symbol Fig 3. IEC logic symbol 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 2 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset (cid:81)(cid:36) (cid:81)(cid:37) (cid:81)(cid:53)(cid:39) (cid:57)(cid:38)(cid:38) (cid:83)(cid:82)(cid:90)(cid:72)(cid:85)(cid:16)(cid:82)(cid:81) (cid:85)(cid:72)(cid:86)(cid:72)(cid:87) (cid:53) (cid:81)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:52) (cid:39) (cid:57)(cid:38)(cid:38) (cid:41)(cid:41) (cid:38) (cid:38) (cid:57)(cid:38)(cid:38) (cid:83)(cid:88)(cid:79)(cid:79)(cid:16)(cid:71)(cid:82)(cid:90)(cid:81) (cid:76)(cid:83)(cid:16)(cid:3)(cid:82)(cid:83) (cid:57)(cid:38)(cid:38) (cid:39) (cid:52) (cid:41)(cid:41) (cid:38) (cid:81)(cid:52) (cid:81)(cid:52) (cid:81)(cid:38)(cid:40)(cid:59)(cid:55) (cid:38) (cid:52) (cid:42)(cid:49)(cid:39) (cid:53) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:26) Fig 4. Logic diagram (cid:57)(cid:38)(cid:38) (cid:53)(cid:40)(cid:59)(cid:55) (cid:38)(cid:40)(cid:59)(cid:55) (cid:42)(cid:49)(cid:39) (cid:81)(cid:38)(cid:40)(cid:59)(cid:55) (cid:81)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:27) It is recommended to connect pins nCEXT externally to the GND pin. Fig 5. Timing component connections 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 3 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 5. Pinning information 5.1 Pinning (cid:26)(cid:23)(cid:43)(cid:38)(cid:55)(cid:21)(cid:21)(cid:20) (cid:20)(cid:36) (cid:20) (cid:20)(cid:25) (cid:57)(cid:38)(cid:38) (cid:20)(cid:37) (cid:21) (cid:20)(cid:24) (cid:20)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:20)(cid:53)(cid:39) (cid:22) (cid:20)(cid:23) (cid:20)(cid:38)(cid:40)(cid:59)(cid:55) (cid:20)(cid:52) (cid:23) (cid:20)(cid:22) (cid:20)(cid:52) (cid:21)(cid:52) (cid:24) (cid:20)(cid:21) (cid:21)(cid:52) (cid:21)(cid:38)(cid:40)(cid:59)(cid:55) (cid:25) (cid:20)(cid:20) (cid:21)(cid:53)(cid:39) (cid:21)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:26) (cid:20)(cid:19) (cid:21)(cid:37) (cid:42)(cid:49)(cid:39) (cid:27) (cid:28) (cid:21)(cid:36) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:21)(cid:28) Fig 6. Pin configuration for SO16 5.2 Pin description Table 2. Pin descripti on Symbol Pin Description 1A 1 negative-edge triggered input 1 1B 2 positive-edge triggered input 1 1RD 3 direct reset LOW and positive-edge triggered input 1 1Q 4 active LOW output 1 2Q 5 active HIGH output 2 2CEXT 6 external capacitor connection 2 2REXT/CEXT 7 external resistor and capacitor connection 2 GND 8 ground (0V) 2A 9 negative-edge triggered input 2 2B 10 positive-edge triggered input 2 2RD 11 direct reset LOW and positive-edge triggered input 2 2Q 12 active LOW output 2 1Q 13 active HIGH output 1 1CEXT 14 external capacitor connection 1 1REXT/CEXT 15 external resistor and capacitor connection 1 V 16 supply voltage CC 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 4 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 6. Functional description Table 3. Function tab le[1] Input Output nRD nA nB nQ nQ L X X L H X H X L[2] H[2] X X L L[2] H[2] H L  H  H  L H [3] [3] [1] H =HIGH voltage level; L =LOW voltage level; X = don’t care;  =LOW-to-HIGH transition;  =HIGH-to-LOW transition; = one HIGH level output pulse; = one LOW level output pulse. [2] If the monostable was triggered before this condition was established, the pulse will continue as programmed. [3] For this combination the reset input must be LOW and the following sequence must be used: pin nA must be set HIGH or pin nB set LOW; then pin nA must be LOW and pin nB set HIGH. Now the reset input goes from LOW-to-HIGH and the device will be triggered. 7. Limiting values Table 4. Limiting valu es In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit V supply voltage 0.5 +7 V CC I input clamping current V < 0.5V or V >V +0.5 V - 20 mA IK I I CC I output clamping current V <0.5V or V > V + 0.5 V - 20 mA OK O O CC I output current except for pins nREXT/CEXT; - 25 mA O V =0.5V to (V +0.5V) O CC I supply current - 50 mA CC I ground current 50 - mA GND T storage temperature 65 +150 C stg P total power dissipation SO16 package [1] - 500 mW tot [1] For SO16 package: Ptot derates linearly with 8mW/K above 70 C. 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 5 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 8. Recommended operating conditions Table 5. Recommend ed operating conditions Symbol Parameter Conditions Min Typ Max Unit V supply voltage 4.5 5.0 5.5 V CC V input voltage 0 - V V I CC V output voltage 0 - V V O CC t/V input transition rise and fall rate nA, nRD input V = 4.5 V - 1.67 139 ns/V CC T ambient temperature 40 +25 +125 C amb 9. Static characteristics Table 6. Static charac teristics At recommended operating conditions; voltages are referenced to GND (ground=0V). Symbol Parameter Conditions 25C 40C to +85C 40C to +125C Unit Min Typ Max Min Max Min Max V HIGH-level V =4.5V to 5.5V 2.0 1.6 - 2.0 - 2.0 - V IH CC inputvoltage V LOW-level V =4.5V to 5.5V - 1.2 0.8 - 0.8 - 0.8 V IL CC inputvoltage V HIGH-level V =V orV ; V =4.5V OH I IH IL CC outputvoltage I =20A 4.4 4.5 - 4.4 - 4.4 - V O I =4mA 3.98 4.32 - 3.84 - 3.7 - V O V LOW-level V =V orV ; V =4.5V OL I IH IL CC outputvoltage I =20A - 0 0.1 - 0.1 - 0.1 V O I =4.0mA - 0.15 0.26 - 0.33 - 0.4 V O I input leakage V =V orGND; V =5.5V - - 0.1 - 1.0 - 1.0 A I I CC CC current I supply current V =V orGND; I =0A; - - 8.0 - 80 - 160 A CC I CC O V =5.5V CC I additional per input pin; I =0A; CC O supply current V =V  2.1V; I CC otherinputsat V orGND; CC V =4.5Vto5.5V CC pin nB - 30 108 - 135 - 147 A pins nA, nRD - 50 180 - 225 - 245 A C input - 3.5 - - - - - pF I capacitance 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 6 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 10. Dynamic characteristics Table 7. Dynamic cha racteristics Voltages are referenced to GND(ground =0V); C =50pF unless otherwise specified; for test circuit see Figure15. L Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max t LOW to HIGH C = 0 pF; R = 5k; PLH EXT EXT propagation see Figure7 and Figure8 delay nA, nRD to nQ (trigger) V = 4.5 V - 30 50 - 63 - 75 ns CC V = 5V; C =15pF - 36 - - - - - ns CC L nB to nQ (trigger) V = 4.5 V - 24 42 - 53 - 63 ns CC V = 5V; C =15pF - 36 - - - - - ns CC L nRD to nQ (reset) V = 4.5 V - 31 51 - 64 - 77 ns CC V = 5V; C =15pF - 36 - - - - - ns CC L t HIGH to LOW C = 0 pF; R = 5k; PHL EXT EXT propagation see Figure7 and Figure8 delay nA to nQ (trigger) V = 4.5 V - 26 44 - 55 - 75 ns CC V = 5V; C =15pF - 32 - - - - - ns CC L nB to nQ (trigger) V = 4.5 V - 21 35 - 44 - 53 ns CC V = 5V; C =15pF - 32 - - - - - ns CC L nRD to nQ (trigger) V = 4.5 V - 26 43 - 54 - 65 ns CC V = 5V; C =15pF - 32 - - - - - ns CC L nRD to nQ (reset) V = 4.5 V - 26 43 - 54 - 65 ns CC V = 5V; C =15pF - 32 - - - - - ns CC L t transition time V = 4.5 V; see Figure7 [1] - 7 15 - 19 - 22 ns t CC 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 7 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset Table 7. Dynamic characteristics …continued Voltages are referenced to GND(ground =0V); C =50pF unless otherwise specified; for test circuit see Figure15. L Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max t pulse width nALOW; nBHIGH; (trigger); W seeFigure7 V = 4.5 V 20 13 - 25 - 30 - ns CC nRDLOW; see Figure10 V = 4.5 V 22 13 - 28 - 33 - ns CC nQHIGH and nQLOW; seeFigure8 V = 5 V; C = 100 nF; 630 700 770 602 798 595 805 s CC EXT R =10 k EXT nQ or nQ (trigger); seeFigure8 V = 4.5 V; C = 28 pF; - 140 - - - - - ns CC EXT R =2 k EXT V = 4.5 V; C = 1 nF; - 1.5 - - - - - s CC EXT R =2 k EXT V = 4.5 V; C = 1 nF; - 7 - - - - - s CC EXT R =10 k EXT t recovery time nRD to nA,nB; 20 12 - 25 - 30 - ns rec seeFigure11 R external V = 5.0 V; see Figure13 2 - 1000 - - - - k EXT CC timing resistor C external V = 5.0 V; see Figure13 no limits pF EXT CC timing capacitor 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 8 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset Table 7. Dynamic characteristics …continued Voltages are referenced to GND(ground =0V); C =50pF unless otherwise specified; for test circuit see Figure15. L Symbol Parameter Conditions 25 C 40 C to +85 C 40 C to +125 C Unit Min Typ Max Min Max Min Max C power per monostable; [2] - 96 - - - - - pF PD dissipation V =GNDtoV  1.5 V I CC capacitance [1] t is the same as t and t t THL TLH [2] CPD is used to determine the dynamic power dissipation (PD in W). PD=CPDVCC2fi+(CLVCC2fo)+0.33CEXTVCC2fo+D28VCC where: f =input frequency in MHz; i f =output frequency in MHz; o D=duty factor in %; CL=output load capacitance in pF; V =supply voltage in V; CC C =timing capacitance in pF; EXT (CLVCC2 fo)sum of outputs. 11. Waveforms and graphs (cid:87)(cid:58) (cid:57)(cid:44) (cid:81)(cid:36)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:87)(cid:58) (cid:57)(cid:44) (cid:81)(cid:37)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:87)(cid:51)(cid:47)(cid:43) (cid:57)(cid:50)(cid:43) (cid:57)(cid:60) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:57)(cid:59) (cid:57)(cid:50)(cid:47) (cid:87)(cid:55)(cid:43)(cid:47) (cid:87)(cid:58) (cid:57)(cid:50)(cid:43) (cid:57)(cid:60) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:57)(cid:50)(cid:47) (cid:57)(cid:59) (cid:87)(cid:51)(cid:43)(cid:47) (cid:87)(cid:55)(cid:47)(cid:43) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:20) Measurement points are given in Table8. V and V are typical voltage output levels that occur with the output load. OL OH Fig 7. Propagation delay from input (nA, nB) to output (nQ, nQ), nA, nB pulse widths and output transition times 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 9 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset Table 8. Measuremen t points Input Output V V V V M M X Y 1.3V 1.3V 0.1V 0.9V CC CC (cid:57)(cid:44) (cid:81)(cid:53)(cid:39)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:87)(cid:51)(cid:43)(cid:47) (cid:57)(cid:50)(cid:43) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:57)(cid:50)(cid:47) (cid:87)(cid:51)(cid:47)(cid:43) (cid:57)(cid:50)(cid:43) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:57)(cid:50)(cid:47) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:21) Measurement points are given in Table8. V and V are typical voltage output levels that occur with the output load. OL OH Fig 8. Propagation delay from reset input (nRD) to outputs (nQ, nQ) (cid:81)(cid:37)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:87)(cid:58) (cid:81)(cid:36)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:87)(cid:58) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:87)(cid:58) (cid:87)(cid:58) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:23) nRD = HIGH Fig 9. Output pulse control 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 10 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset (cid:81)(cid:37)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:81)(cid:53)(cid:39)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:81)(cid:52)(cid:3)(cid:82)(cid:88)(cid:87)(cid:83)(cid:88)(cid:87) (cid:87)(cid:58) (cid:87)(cid:58) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:24) nA = LOW Fig 10. Output pulse control using reset input nRD (cid:87)(cid:58) (cid:57)(cid:44) (cid:81)(cid:53)(cid:39)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:87)(cid:85)(cid:72)(cid:70) (cid:57)(cid:44) (cid:81)(cid:37)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:87)(cid:85)(cid:72)(cid:70) (cid:57)(cid:44) (cid:81)(cid:36)(cid:3)(cid:76)(cid:81)(cid:83)(cid:88)(cid:87) (cid:57)(cid:48) (cid:42)(cid:49)(cid:39) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:25) Measurement points are given in Table8. Fig 11. Reset input (nRD) to inputs nA or nB recovery times 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 11 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset (cid:20)(cid:19)(cid:25) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:26) (cid:87)(cid:58) (cid:11)(cid:81)(cid:86)(cid:12) (cid:20)(cid:19)(cid:24) (cid:11)(cid:20)(cid:12) (cid:11)(cid:21)(cid:12) (cid:20)(cid:19)(cid:23) (cid:11)(cid:22)(cid:12) (cid:11)(cid:23)(cid:12) (cid:20)(cid:19)(cid:22) (cid:20)(cid:19)(cid:21) (cid:20)(cid:19) (cid:20) (cid:20)(cid:19)(cid:16)(cid:20) (cid:20)(cid:19) (cid:20)(cid:19)(cid:21) (cid:20)(cid:19)(cid:22) (cid:20)(cid:19)(cid:23) (cid:20)(cid:19)(cid:24) (cid:20)(cid:19)(cid:25) (cid:20)(cid:19)(cid:26) (cid:20)(cid:19)(cid:27) (cid:38)(cid:40)(cid:59)(cid:55)(cid:3)(cid:11)(cid:83)(cid:41)(cid:12) VCC = 4.5V; Tamb = 25C. (1) REXT = 100k (2) REXT = 50k (3) REXT = 10k (4) REXT = 2k Fig 12. Typical output pulse width as a function of the external capacitor (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:27) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:22)(cid:28) (cid:26)(cid:21)(cid:19) (cid:67)(cid:46)(cid:10)(cid:3)(cid:73)(cid:68)(cid:70)(cid:87)(cid:82)(cid:85) (cid:87)(cid:58) (cid:20)(cid:17)(cid:19) (cid:11)(cid:151)(cid:86)(cid:12) (cid:26)(cid:20)(cid:24) (cid:19)(cid:17)(cid:28) (cid:26)(cid:20)(cid:19) (cid:11)(cid:20)(cid:12) (cid:19)(cid:17)(cid:27) (cid:11)(cid:21)(cid:12) (cid:26)(cid:19)(cid:24) (cid:11)(cid:22)(cid:12) (cid:11)(cid:23)(cid:12) (cid:19)(cid:17)(cid:26) (cid:26)(cid:19)(cid:19) (cid:16)(cid:24)(cid:19) (cid:19) (cid:20)(cid:19)(cid:19) (cid:20)(cid:24)(cid:19) (cid:23)(cid:17)(cid:24) (cid:24)(cid:17)(cid:19) (cid:24)(cid:17)(cid:24) (cid:55)(cid:68)(cid:80)(cid:69)(cid:3)(cid:11)(cid:131)(cid:38)(cid:12) (cid:57)(cid:38)(cid:38)(cid:3)(cid:11)(cid:57)(cid:12) CEXT = 0.1 F; REXT = 10k.; VCC = 5.0 V REXT = 10k; Tamb = 25C. (1) CEXT = 0.001 F (2) CEXT = 0.01 F (3) CEXT = 0.1 F (4) CEXT = 1 F Fig 13. Typical output pulse width as a function of the Fig 14. “K” factor as function of the supply voltage ambient temperature 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 12 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset (cid:87)(cid:58) (cid:57)(cid:44) (cid:28)(cid:19)(cid:3)(cid:8) (cid:81)(cid:72)(cid:74)(cid:68)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3) (cid:83)(cid:88)(cid:79)(cid:86)(cid:72) (cid:57)(cid:48) (cid:57)(cid:48) (cid:20)(cid:19)(cid:3)(cid:8) (cid:19)(cid:3)(cid:57) (cid:87)(cid:73) (cid:87)(cid:85) (cid:87)(cid:85) (cid:87)(cid:73) (cid:57)(cid:44) (cid:28)(cid:19)(cid:3)(cid:8) (cid:83)(cid:82)(cid:86)(cid:76)(cid:87)(cid:76)(cid:89)(cid:72)(cid:3) (cid:83)(cid:88)(cid:79)(cid:86)(cid:72) (cid:57)(cid:48) (cid:57)(cid:48) (cid:20)(cid:19)(cid:3)(cid:8) (cid:19)(cid:3)(cid:57) (cid:87)(cid:58) (cid:57)(cid:38)(cid:38) (cid:57)(cid:38)(cid:38) (cid:57)(cid:44) (cid:57)(cid:50) (cid:3)(cid:53)(cid:47) (cid:54)(cid:20) (cid:42) (cid:39)(cid:56)(cid:55) (cid:82)(cid:83)(cid:72)(cid:81) (cid:53)(cid:55) (cid:38)(cid:47) (cid:19)(cid:19)(cid:20)(cid:68)(cid:68)(cid:71)(cid:28)(cid:27)(cid:22) Test data is given in Table9. Definitions test circuit: RT = Termination resistance should be equal to output impedance Zo of the pulse generator. CL = Load capacitance including jig and probe capacitance. RL = Load resistance. S1 = Test selection switch. Fig 15. Test circuit for measuring switching times Table 9. Test data Input Load S1 position V t, t C R t , t I r f L L PHL PLH 3V 6ns 15 pF, 50 pF 1k open 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 13 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 12. Application information 12.1 Power-down considerations A large capacitor C may cause problems when powering-down the monostable due to EXT the energy stored in this capacitor. When a system containing this device is powered-down or a rapid decrease of V to zero occurs, the monostable may sustain CC damage, due to the capacitor discharging through the input protection diodes. To avoid this possibility, use a damping diode (D ) preferably a germanium or Schottky type EXT diode able to withstand large current surges and connect as shown in Figure16. (cid:39)(cid:40)(cid:59)(cid:55) (cid:38)(cid:40)(cid:59)(cid:55) (cid:53)(cid:40)(cid:59)(cid:55) (cid:57)(cid:38)(cid:38) (cid:42)(cid:49)(cid:39) (cid:81)(cid:38)(cid:40)(cid:59)(cid:55) (cid:81)(cid:53)(cid:40)(cid:59)(cid:55)(cid:18)(cid:38)(cid:40)(cid:59)(cid:55) (cid:68)(cid:68)(cid:68)(cid:16)(cid:19)(cid:21)(cid:23)(cid:27)(cid:23)(cid:19) Fig 16. Power-down protection circuit 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 14 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 13. Package outline (cid:54)(cid:50)(cid:20)(cid:25)(cid:29)(cid:3)(cid:83)(cid:79)(cid:68)(cid:86)(cid:87)(cid:76)(cid:70)(cid:3)(cid:86)(cid:80)(cid:68)(cid:79)(cid:79)(cid:3)(cid:82)(cid:88)(cid:87)(cid:79)(cid:76)(cid:81)(cid:72)(cid:3)(cid:83)(cid:68)(cid:70)(cid:78)(cid:68)(cid:74)(cid:72)(cid:30)(cid:3)(cid:20)(cid:25)(cid:3)(cid:79)(cid:72)(cid:68)(cid:71)(cid:86)(cid:30)(cid:3)(cid:69)(cid:82)(cid:71)(cid:92)(cid:3)(cid:90)(cid:76)(cid:71)(cid:87)(cid:75)(cid:3)(cid:22)(cid:17)(cid:28)(cid:3)(cid:80)(cid:80)(cid:3) (cid:54)(cid:50)(cid:55)(cid:20)(cid:19)(cid:28)(cid:16)(cid:20)(cid:3) (cid:39)(cid:3) (cid:40)(cid:3) (cid:36)(cid:3) (cid:59)(cid:3) (cid:70)(cid:3) (cid:92)(cid:3) (cid:43)(cid:3)(cid:40)(cid:3) (cid:89)(cid:3)(cid:48)(cid:3) (cid:36)(cid:3) (cid:61)(cid:3) (cid:20)(cid:25)(cid:3) (cid:28)(cid:3) (cid:52)(cid:3) (cid:36)(cid:3)(cid:21)(cid:3)(cid:36)(cid:3)(cid:20)(cid:3) (cid:11)(cid:36)(cid:3)(cid:22)(cid:3)(cid:3)(cid:12)(cid:3) (cid:36)(cid:3) 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(cid:39)(cid:44)(cid:48)(cid:40)(cid:49)(cid:54)(cid:44)(cid:50)(cid:49)(cid:54)(cid:3)(cid:11)(cid:76)(cid:81)(cid:70)(cid:75)(cid:3)(cid:71)(cid:76)(cid:80)(cid:72)(cid:81)(cid:86)(cid:76)(cid:82)(cid:81)(cid:86)(cid:3)(cid:68)(cid:85)(cid:72)(cid:3)(cid:71)(cid:72)(cid:85)(cid:76)(cid:89)(cid:72)(cid:71)(cid:3)(cid:73)(cid:85)(cid:82)(cid:80)(cid:3)(cid:87)(cid:75)(cid:72)(cid:3)(cid:82)(cid:85)(cid:76)(cid:74)(cid:76)(cid:81)(cid:68)(cid:79)(cid:3)(cid:80)(cid:80)(cid:3)(cid:71)(cid:76)(cid:80)(cid:72)(cid:81)(cid:86)(cid:76)(cid:82)(cid:81)(cid:86)(cid:12)(cid:3) (cid:56)(cid:49)(cid:44)(cid:55)(cid:3) (cid:80)(cid:36)(cid:68)(cid:91)(cid:3)(cid:17)(cid:3) (cid:36)(cid:3)(cid:20)(cid:3) (cid:36)(cid:3)(cid:21)(cid:3) (cid:36)(cid:3)(cid:22)(cid:3) (cid:69)(cid:3)(cid:83)(cid:3) (cid:70)(cid:3) (cid:39)(cid:3)(cid:11)(cid:20)(cid:12)(cid:3) (cid:40)(cid:3)(cid:11)(cid:20)(cid:12)(cid:3) (cid:72)(cid:3) (cid:43)(cid:3)(cid:40)(cid:3) (cid:47)(cid:3) (cid:47)(cid:3)(cid:83)(cid:3) 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(cid:19)(cid:17)(cid:19)(cid:20)(cid:3) (cid:19)(cid:17)(cid:19)(cid:19)(cid:23)(cid:3) (cid:19)(cid:17)(cid:19)(cid:19)(cid:23)(cid:3) (cid:19)(cid:17)(cid:19)(cid:23)(cid:28)(cid:3) (cid:19)(cid:17)(cid:19)(cid:20)(cid:23)(cid:3)(cid:19)(cid:17)(cid:19)(cid:19)(cid:26)(cid:24)(cid:3) (cid:19)(cid:17)(cid:22)(cid:27)(cid:3) (cid:19)(cid:17)(cid:20)(cid:24)(cid:3) (cid:19)(cid:17)(cid:21)(cid:21)(cid:27)(cid:3) (cid:19)(cid:17)(cid:19)(cid:20)(cid:25)(cid:3) (cid:19)(cid:17)(cid:19)(cid:21)(cid:19)(cid:3) (cid:19)(cid:17)(cid:19)(cid:20)(cid:21)(cid:3) (cid:49)(cid:82)(cid:87)(cid:72)(cid:3) (cid:20)(cid:17)(cid:3)(cid:51)(cid:79)(cid:68)(cid:86)(cid:87)(cid:76)(cid:70)(cid:3)(cid:82)(cid:85)(cid:3)(cid:80)(cid:72)(cid:87)(cid:68)(cid:79)(cid:3)(cid:83)(cid:85)(cid:82)(cid:87)(cid:85)(cid:88)(cid:86)(cid:76)(cid:82)(cid:81)(cid:86)(cid:3)(cid:82)(cid:73)(cid:3)(cid:19)(cid:17)(cid:20)(cid:24)(cid:3)(cid:80)(cid:80)(cid:3)(cid:11)(cid:19)(cid:17)(cid:19)(cid:19)(cid:25)(cid:3)(cid:76)(cid:81)(cid:70)(cid:75)(cid:12)(cid:3)(cid:80)(cid:68)(cid:91)(cid:76)(cid:80)(cid:88)(cid:80)(cid:3)(cid:83)(cid:72)(cid:85)(cid:3)(cid:86)(cid:76)(cid:71)(cid:72)(cid:3)(cid:68)(cid:85)(cid:72)(cid:3)(cid:81)(cid:82)(cid:87)(cid:3)(cid:76)(cid:81)(cid:70)(cid:79)(cid:88)(cid:71)(cid:72)(cid:71)(cid:17)(cid:3)(cid:3) (cid:50)(cid:56)(cid:55)(cid:47)(cid:44)(cid:49)(cid:40)(cid:3) (cid:3)(cid:53)(cid:40)(cid:41)(cid:40)(cid:53)(cid:40)(cid:49)(cid:38)(cid:40)(cid:54)(cid:3) (cid:40)(cid:56)(cid:53)(cid:50)(cid:51)(cid:40)(cid:36)(cid:49)(cid:3) (cid:44)(cid:54)(cid:54)(cid:56)(cid:40)(cid:3)(cid:39)(cid:36)(cid:55)(cid:40)(cid:3) (cid:57)(cid:40)(cid:53)(cid:54)(cid:44)(cid:50)(cid:49)(cid:3) (cid:3)(cid:44)(cid:40)(cid:38)(cid:3) (cid:3)(cid:45)(cid:40)(cid:39)(cid:40)(cid:38)(cid:3) (cid:3)(cid:45)(cid:40)(cid:44)(cid:55)(cid:36)(cid:3) (cid:51)(cid:53)(cid:50)(cid:45)(cid:40)(cid:38)(cid:55)(cid:44)(cid:50)(cid:49)(cid:3) (cid:28)(cid:28)(cid:16)(cid:20)(cid:21)(cid:16)(cid:21)(cid:26)(cid:3) (cid:3)(cid:54)(cid:50)(cid:55)(cid:20)(cid:19)(cid:28)(cid:16)(cid:20)(cid:3) (cid:3)(cid:19)(cid:26)(cid:25)(cid:40)(cid:19)(cid:26)(cid:3) (cid:3)(cid:48)(cid:54)(cid:16)(cid:19)(cid:20)(cid:21)(cid:3) (cid:19)(cid:22)(cid:16)(cid:19)(cid:21)(cid:16)(cid:20)(cid:28)(cid:3) Fig 17. Package outline SOT109-1 (SO16) 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 15 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 14. Abbreviations Table 10. Abbreviation s Acronym Abbreviation CMOS Complementary Metal Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model 15. Revision history T able 11. Revision history Document ID Release date Data sheet status Change notice Supersedes 74HCT221 v.3 20161026 Product data sheet - 74HC_HCT221 v.2 Modifications: • The format of this data sheet has been redesigned to comply with the new identity guidelines of NXP Semiconductors. • Legal texts have been adapted to the new company name where appropriate. • Type numbers 74HC221N, 74HC221D, 74HC221DB and 74HCT221N removed. 74HC_HCT221 v.2 19901201 Product specification - - 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 16 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 16. Legal information 16.1 Data sheet status Document status[1][2] Product status[3] Definition Objective [short] data sheet Development This document contains data from the objective specification for product development. Preliminary [short] data sheet Qualification This document contains data from the preliminary specification. Product [short] data sheet Production This document contains the product specification. [1] Please consult the most recently issued document before initiating or completing a design. [2] The term ‘short data sheet’ is explained in section “Definitions”. [3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status information is available on the Internet at URLhttp://www.nexperia.com. 16.2 Definitions Suitability for use — Nexperia products are not designed, authorized or warranted to be suitable for use in life support, life-critical or safety-critical systems or equipment, nor in applications where failure or Draft — The document is a draft version only. The content is still under malfunction of a Nexperia product can reasonably be expected internal review and subject to formal approval, which may result in to result in personal injury, death or severe property or environmental modifications or additions. Nexperia does not give any damage. Nexperia and its suppliers accept no liability for representations or warranties as to the accuracy or completeness of inclusion and/or use of Nexperia products in such equipment or information included herein and shall have no liability for the consequences of applications and therefore such inclusion and/or use is at the customer’s own use of such information. risk. Short data sheet — A short data sheet is an extract from a full data sheet Applications — Applications that are described herein for any of these with the same product type number(s) and title. A short data sheet is intended products are for illustrative purposes only. Nexperia makes no for quick reference only and should not be relied upon to contain detailed and representation or warranty that such applications will be suitable for the full information. For detailed and full information see the relevant full data specified use without further testing or modification. sheet, which is available on request via the local Nexperia sales office. In case of any inconsistency or conflict with the short data sheet, the Customers are responsible for the design and operation of their applications full data sheet shall prevail. and products using Nexperia products, and Nexperia accepts no liability for any assistance with applications or customer product Product specification — The information and data provided in a Product design. It is customer’s sole responsibility to determine whether the Nexperia data sheet shall define the specification of the product as agreed between product is suitable and fit for the customer’s applications and Nexperia and its customer, unless Nexperia and products planned, as well as for the planned application and use of customer have explicitly agreed otherwise in writing. In no event however, customer’s third party customer(s). Customers should provide appropriate shall an agreement be valid in which the Nexperia product is design and operating safeguards to minimize the risks associated with their deemed to offer functions and qualities beyond those described in the applications and products. Product data sheet. Nexperia does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the 16.3 Disclaimers customer’s applications or products, or the application or use by customer’s third party customer(s). Customer is responsible for doing all necessary testing for the customer’s applications and products using Nexperia Limited warranty and liability — Information in this document is believed to products in order to avoid a default of the applications and be accurate and reliable. However, Nexperia does not give any the products or of the application or use by customer’s third party representations or warranties, expressed or implied, as to the accuracy or customer(s). Nexperia does not accept any liability in this respect. completeness of such information and shall have no liability for the consequences of use of such information. Nexperia takes no Limiting values — Stress above one or more limiting values (as defined in responsibility for the content in this document if provided by an information the Absolute Maximum Ratings System of IEC60134) will cause permanent source outside of Nexperia. damage to the device. Limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in In no event shall Nexperia be liable for any indirect, incidental, the Recommended operating conditions section (if present) or the punitive, special or consequential damages (including - without limitation - lost Characteristics sections of this document is not warranted. Constant or profits, lost savings, business interruption, costs related to the removal or repeated exposure to limiting values will permanently and irreversibly affect replacement of any products or rework charges) whether or not such the quality and reliability of the device. damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Terms and conditions of commercial sale — Nexperia products are sold subject to the general terms and conditions of commercial Notwithstanding any damages that customer might incur for any reason whatsoever, Nexperia’s aggregate and cumulative liability towards sale, as published at http://www.nexperia.com/profile/terms, unless otherwise customer for the products described herein shall be limited in accordance agreed in a valid written individual agreement. In case an individual with the Terms and conditions of commercial sale of Nexperia. agreement is concluded only the terms and conditions of the respective agreement shall apply. Nexperia hereby expressly objects to Right to make changes — Nexperia reserves the right to make applying the customer’s general terms and conditions with regard to the changes to information published in this document, including without purchase of Nexperia products by customer. limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior No offer to sell or license — Nothing in this document may be interpreted or to the publication hereof. construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 17 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset Export control — This document as well as the item(s) described herein Nexperia’s specifications such use shall be solely at customer’s may be subject to export control regulations. Export might require a prior own risk, and (c) customer fully indemnifies Nexperia for any authorization from competent authorities. liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond Nexperia’s Non-automotive qualified products — Unless this data sheet expressly standard warranty and Nexperia’s product specifications. states that this specific Nexperia product is automotive qualified, the product is not suitable for automotive use. It is neither qualified nor tested Translations — A non-English (translated) version of a document is for in accordance with automotive testing or application requirements. Nexperia reference only. The English version shall prevail in case of any discrepancy accepts no liability for inclusion and/or use of between the translated and English versions. non-automotive qualified products in automotive equipment or applications. In the event that customer uses the product for design-in and use in 16.4 Trademarks automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia’s warranty of the Notice: All referenced brands, product names, service names and trademarks product for such automotive applications, use and specifications, and (b) are the property of their respective owners. whenever customer uses the product for automotive applications beyond 17. Contact information For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com 74HCT221 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved Product data sheet Rev. 3 — 26 October 2016 18 of 19

74HCT221 Nexperia Dual non-retriggerable monostable multivibrator with reset 18. Contents 1 General description. . . . . . . . . . . . . . . . . . . . . . 1 2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 Ordering information. . . . . . . . . . . . . . . . . . . . . 1 4 Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4 5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 6 Functional description . . . . . . . . . . . . . . . . . . . 5 7 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 Recommended operating conditions. . . . . . . . 6 9 Static characteristics. . . . . . . . . . . . . . . . . . . . . 6 10 Dynamic characteristics. . . . . . . . . . . . . . . . . . 7 11 Waveforms and graphs. . . . . . . . . . . . . . . . . . . 9 12 Application information. . . . . . . . . . . . . . . . . . 14 12.1 Power-down considerations. . . . . . . . . . . . . . 14 13 Package outline. . . . . . . . . . . . . . . . . . . . . . . . 15 14 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 16 15 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 16 16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 17 16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 17 16.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 16.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 17 16.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 18 17 Contact information. . . . . . . . . . . . . . . . . . . . . 18 18 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 © Nexperia B.V. 2017. All rights reserved For more information, please visit: http://www.nexperia.com For sales office addresses, please send an email to: salesaddresses@nexperia.com Date of release: 26 October 2016