74HC4538 Dual retriggerable precision monostable multivibrator Rev. 5 — 17 March 2017 Product data sheet 1 General description The 74HC4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has two trigger/retrigger inputs (nA and nB), a direct reset input (nCD), two complementary outputs (nQ and nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components C and R . Typical pulse width EXT EXT variation over temperature range is ± 0.2 %. The device may be triggered by either the positive or the negative edges of the input pulse. The duration and accuracy of the output pulse are determined by the external timing components C and R . The output EXT EXT pulse width (T ) is equal to 0.7 × R × C . The linear design techniques guarantee W EXT EXT precise control of the output pulse width. A LOW level at nCD terminates the output pulse immediately. Schmitt-trigger action in the trigger inputs makes the circuit highly tolerant to slower rise and fall times. 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 • Tolerant of slow trigger rise and fall times • Separate reset inputs • Triggering from falling or rising edge • Complies with JEDEC standard no. 7A • CMOS input levels: • ESD protection: –HBM JESD22-A114F exceeds 2000 V –MM JESD22-A115-A exceeds 200 V • Multiple package options • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 3 Ordering information Table 1. Ordering information Type number Package Temperature Name Description Version range 74HC4538D -40 °C to +125 °C SO16 plastic small outline package; 16 leads; SOT109-1 body width 3.9 mm 74HC4538DB -40 °C to +125 °C SSOP16 plastic shrink small outline package; 16 leads; SOT338-1 body width 5.3 mm 74HC4538PW -40 °C to +125 °C TSSOP16 plastic thin shrink small outline package; 16 leads; SOT403-1 body width 4.4 mm 4 Functional diagram 2 1REXT/CEXT 1 1CEXT 1Q 6 5 1A 4 1B 1Q 7 3 1CD 14 2REXT/CEXT 15 2CEXT 2Q 10 11 2A 12 2B 2Q 9 13 2CD 001aae727 Figure 1. Functional diagram 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 2 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator nB nA VCC nREXT/CEXT Vref1 enable nCEXT GND nCD power-onreset Vref2 VCC enable nQ nQ mba338 GND Figure 2. Logic diagram (one multivibrator) 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 3 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 5 Pinning information 5.1 Pinning 74HC4538 1CEXT 1 16 VCC 74HC4538 1REXT/CEXT 2 15 2CEXT 1CD 3 14 2REXT/CEXT 1CEXT 1 16 VCC 1REXT/CEXT 2 15 2CEXT 1B 4 13 2CD 1CD 3 14 2REXT/CEXT 1A 5 12 2B 1B 4 13 2CD 1Q 6 11 2A 1A 5 12 2B 1Q 6 11 2A 1Q 7 10 2Q 1Q 7 10 2Q GND 8 9 2Q GND 8 9 2Q aaa-026540 aaa-026542 Figure 3. Pin configuration for SO16 Figure 4. Pin configuration for SSOP16 and TSSOP16 5.2 Pin description Table 2. Pin description Symbol Pin Description 1CEXT, 2CEXT 1, 15 external capacitor connection (always connected to ground) 1REXT/CEXT, 2REXT/CEXT 2, 14 external capacitor/resistor connection 1CD, 2CD 3, 13 direct reset input (active LOW) 1B, 2B 4, 12 input (LOW to HIGH triggered) 1A, 2A 5, 11 input (HIGH to LOW triggered) 1Q, 2Q 6, 10 output 1Q, 2Q 7, 9 complementary output (active LOW) GND 8 ground (0 V) V 16 supply voltage CC 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 4 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 6 Functional description [1] Table 3. Function table Inputs Outputs nA nB nCD nQ nQ ↓ L H H ↑ H X X L L H [1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; ↑ = positive-going transition; ↓ = negative-going transition; = one HIGH level output pulse, with the pule width determined by CEXT and REXT; = one LOW level output pulse, with the pulse width determined by CEXT and REXT. (1) (1) (2) (1) nBinput (3) nAinput (4) nCDinput nREXT/CEXTinput Vref2 Vref2 Vref1 Vref1 nQoutput T T T (5) 001aae737 (1) Positive edge triggering. (2) Positive edge re-triggering (pulse lengthening). (3) Negative edge triggering. (4) Reset (pulse shortening). (5) T = 0.7 x R x C (see also Figure 6. W EXT EXT Figure 5. Timing diagram CEXT REXT GND VCC nCEXT nREXT/CEXT nQ nA T nB nQ T=0.7×REXT×CEXT nCD 001aak192 Figure 6. Connection of the external timing components R and C EXT EXT 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 5 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 7 Limiting values Table 4. Limiting values 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 +7.0 V CC [1] I input clamping current V < -0.5 V or V > V + 0.5 V - ±20 mA IK I I CC [1] I output clamping current V < -0.5 V or V > V + 0.5 V - ±20 mA OK O O CC I output current V = -0.5 V to V + 0.5 V - ±25 mA O 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 T = -40 °C to +125 °C tot amb [2] SO16 package - 500 mW [3] (T)SSOP16 package - 500 mW [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] Ptot derates linearly with 8 mW/K above 70 °C. [3] Ptot derates linearly with 5.5 mW/K above 60 °C. 8 Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions Min Typ Max Unit V supply voltage 2.0 5.0 6.0 V CC V input voltage 0 - V V I CC V output voltage 0 - V V O CC T ambient temperature -40 - +125 °C amb Δt/ΔV input transition rise and fall rate V = 2.0 V - - 625 ns/V CC V = 4.5 V - 1.67 139 ns/V CC V = 6.0 V - - 83 ns/V CC 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 6 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 9 Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). 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 = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V IH CC input voltage V = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V CC V = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V CC V LOW-level V = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V IL CC input voltage V = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V CC V = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V CC V HIGH-level V = V or V OH I IH IL output voltage I = -20 μA; V = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V O CC I = -20 μA; V = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V O CC I = -20 μA; V = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V O CC I = -4.0 mA; V = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V O CC I = -5.2 mA; V = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V O CC V LOW-level V = V or V OL I IH IL output voltage I = 20 μA; V = 2.0 V - 0 0.1 - 0.1 - 0.1 V O CC I = 20 μA; V = 4.5 V - 0 0.1 - 0.1 - 0.1 V O CC I = 20 μA; V = 6.0 V - 0 0.1 - 0.1 - 0.1 V O CC I = 4.0 mA; V = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V O CC I = 5.2 mA; V = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V O CC I input leakage V = V or GND; - - ±0.1 - ±1 - ±1 μA I I CC current V = 6.0 V CC pin nREXT/CEXT; - - ±50 - ±500 - ±500 nA V = 2.0 V or GND; I other inputs at V or GND; CC [1] V = 6.0 V CC I supply current V = V or GND; I = 0 A; - - 8.0 - 80 - 160 μA CC I CC O V = 6.0 V CC C input - 3.5 - - - - - pF I capacitance [1] This measurement can only be carried out after a trigger pulse is applied. 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 7 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 10 Dynamic characteristics Table 7. Dynamic characteristics Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 9. Symbol Parameter Conditions 25 °C -40 °C to -40 °C to Unit +85 °C +125 °C [1] Min Typ Max Min Max Min Max t LOW to HIGH nA, nB to nQ; see Figure 7 PLH propagation V = 2.0 V - 85 265 - 330 - 400 ns CC delay V = 4.5 V - 31 53 - 66 - 80 ns CC V = 5.0 V; C = 15 pF - 27 - - - - - ns CC L V = 6.0 V - 25 45 - 56 - 68 ns CC nCD to nQ; see Figure 7 V = 2.0 V - 83 265 - 340 - 400 ns CC V = 4.5 V - 30 53 - 68 - 80 ns CC V = 6.0 V - 24 45 - 58 - 68 ns CC t HIGH to LOW nA, nB to nQ; see Figure 7 PHL propagation V = 2.0 V - 83 265 - 330 - 400 ns CC delay V = 4.5 V - 30 53 - 66 - 80 ns CC V = 5.0 V; C = 15 pF - 27 - - - - - ns CC L V = 6.0 V - 24 45 - 56 - 68 ns CC nCD to nQ; see Figure 7 V = 2.0 V - 80 265 - 330 - 400 ns CC V = 4.5 V - 29 53 - 66 - 80 ns CC V = 6.0 V - 23 45 - 56 - 68 ns CC [2] t transition time nQ and nQ; see Figure 7 t V = 2.0 V - 19 75 - 95 - 119 ns CC V = 4.5 V - 7 15 - 19 - 22 ns CC V = 6.0 V - 6 13 - 16 - 19 ns CC t pulse width nA LOW; see Figure 8 W V = 2.0 V 80 17 - 100 - 120 - ns CC V = 4.5 V 16 6 - 20 - 24 - ns CC V = 6.0 V 14 5 - 17 - 20 - ns CC nB HIGH; see Figure 8 V = 2.0 V 80 17 - 100 - 120 - ns CC V = 4.5 V 16 6 - 20 - 24 - ns CC V = 6.0 V 14 5 - 17 - 20 - ns CC nCD LOW; see Figure 8 V = 2.0 V 80 19 - 100 - 120 - ns CC 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 8 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator Symbol Parameter Conditions 25 °C -40 °C to -40 °C to Unit +85 °C +125 °C [1] Min Typ Max Min Max Min Max V = 4.5 V 16 7 - 20 - 24 - ns CC V = 6.0 V 14 6 - 17 - 20 - ns CC nQ and nQ HIGH or LOW; see Figure 8 V = 5.0 V; 630 700 770 602 798 595 805 μs CC C = 0.1 μF; EXT R = 10 kΩ EXT t recovery time nCD to nA, nB; rec see Figure 8 V = 2.0 V 35 6 - 45 - 55 - ns CC V = 4.5 V 7 2 - 9 - 11 - ns CC V = 6.0 V 6 2 - 8 - 9 - ns CC t retrigger time nA, nB; see Figure 8; rtrig X = C / (4.5 × V ) EXT CC V = 2.0 V - 455+X - - - - - ns CC V = 4.5 V - 80+X - - - - - ns CC V = 6.0 V - 55+X - - - - - ns CC R external V = 2.0 V 10 - 1000 - - - - kΩ EXT CC timing V = 5.0 V 2 - 1000 - - - - kΩ CC resistor C external no limits EXT timing capacitor [3] C power per multivibrator; - 136 - - - - - pF PD dissipation V = GND to V I CC capacitance [1] Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V). [2] tt is the same as tTHL and tTLH. [3] CPD is used to determine the dynamic power dissipation (PD in μW). PD = CPD × VCC2 × fi + Σ(CL × VCC2 × fo) + 0.48 × CEXT × VCC2 × fo + D × 0.8 × VCC where: fi = input frequency in MHz; fo = output frequency in MHz; Σ(CL × VCC2 × fo) = sum of the outputs; CL = output load capacitance in pF; VCC = supply voltage in V; D = duty cycle factor in %; CEXT = external timing capacitance in pF. 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 9 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 10.1 Waveforms and test circuit VI nBinput VM GND tW VI nAinput VM GND tW VI nCDinput VM GND tPLH tPLH tPHL VOH VY nQoutput VM VM VOL VX tPHL tTHL tPHL tTLH tPLH VOH nQoutput VM VY VX VOL 001aak194 Measurement points are given in Table 8. Logic levels: V and V are typical output levels that occur with the output load. OL OH Figure 7. Waveforms showing propagation delays and transition times VI nCDinput VM GND tW trec tW VI nAinput VM GND tW VI nBinput VM GND trtrig VOH nQ,nQoutput VM VOL tW 001aak195 Measurement points are given in Table 8. Logic levels: V and V are typical output levels that occur with the output load. OL OH Figure 8. Waveforms showing nA, nB, nQ, nQ pulse widths, recovery and retrigger times 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 10 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator Table 8. Measurement points Input Output V V V V M M X Y 0.5V 0.5V 0.1V 0.9V CC CC CC CC tW VI 90% negative pulse VM VM 10% 0V tf tr tr tf VI 90% positive pulse VM VM 10% 0V tW VCC VCC VI VO RL S1 G DUT open RT CL 001aad983 Test data is given in Table 9 . Definitions test circuit: R = Termination resistance should be equal to output impedance Z of the pulse generator. T o C = Load capacitance including jig and probe capacitance. L R = Load resistance. L S1 = Test selection switch Figure 9. 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 V 6 ns 15 pF, 50 pF 1 kΩ open CC 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 11 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 11 Application information 11.1 Power-down considerations A large capacitor (C ) may cause problems when powering-down the monostable due EXT to energy stored in this capacitor. When a system containing this device is powered- down or rapid decrease of V to zero occurs, the monostable may sustain damage, due CC to the capacitor discharging through the input protection diodes. To avoid this possibility, use a damping diode (D ) preferably a germanium or Schottky type diode able to EXT withstand large current surges and connect as shown in Figure 10 DEXT CEXT REXT GND VCC nCEXT nREXT/CEXT 001aak193 Figure 10. Power-down protection circuit 11.2 Graphs 001aak196 1.6 1.12 1kΩ normalized 2kΩ REXT× Kfactor 5.6kΩ CEXT (K) 51kΩ (tW) 1MΩ 1.2 0.84 1.0 0.70 0.8 0.56 0.6 0.42 10-10 10-9 10-8 10-7 10-6 10-5 10-4 CEXT(F) V = 4.5 V; T = 25 °C. CC amb Figure 11. Typical pulse width accuracy versus external capacitance 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 12 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 001aak197 1.6 1.12 normalized REXT× Kfactor CEXT (K) (tW) 1.2 0.84 1nF 1.0 0.70 >100nF 0.8 0.56 0.6 0.42 103 104 105 106 REXT(Ω) V = 4.5 V; T = 25 °C. CC amb Figure 12. Typical pulse width accuracy versus external resistance 001aak198 1.6 1.12 normalized REXT× Kfactor CEXT (K) (tW) 1.2 0.84 +10% 1.0 REXT 0.70 -10% 0.8 0.56 0.6 0.42 10-10 10-9 10-8 10-7 10-6 10-5 10-4 CEXT(F) V = 4.5 V; R = 10 kΩ; T = 25 °C. CC EXT amb Figure 13. Typical pulse width accuracy versus external capacitance 001aak199 1.7 1.19 2kΩ 1kΩ normalized REXT× Kfactor CEXT (K) 5.6kΩ (tW) 1.3 0.91 10kΩ 1.1 0.77 1MΩ 0.9 0.63 0.7 0.49 1 2 3 4 5 6 VCC(V) C = 1 nF; T = 25 °C. EXT amb Figure 14. Typical pulse width accuracy versus power supply 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 13 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 001aak200 1.7 1.19 normalized REXT× Kfactor CEXT (K) (tW) 1kΩ 1.3 0.91 1.1 2kΩ 0.77 5.6kΩ 1MΩ 0.9 0.63 0.7 0.49 1 2 3 4 5 6 VCC(V) C = 100 nF; T = 25 °C. EXT amb Figure 15. Typical pulse width accuracy versus power supply 001aak201 1.7 1.19 normalized 1kΩ REXT× Kfactor CEXT (K) (tW) 2kΩ 1.3 0.91 5.6kΩ 1.1 1MΩ 0.77 0.9 0.63 0.7 0.49 -50 0 50 100 150 Tamb(°C) V = 4.5 V; C = 1 nF; T = 25 °C. CC EXT amb Figure 16. Typical pulse width accuracy versus temperature 001aak202 1.7 1.19 normalized REXT× Kfactor CEXT (K) (tW) 1.3 0.91 1.1 0.77 1kΩ 0.9 2kΩ 0.63 5.6kΩ 1MΩ 0.7 0.49 -50 0 50 100 150 Tamb(°C) V = 4.5 V; C = 1 μF; T = 25 °C. CC EXT amb Figure 17. Typical pulse width accuracy versus temperature 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 14 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 12 Package outline SO16:plasticsmalloutlinepackage;16leads;bodywidth3.9mm SOT109-1 D E A X c y HE v M A Z 16 9 Q A2 A1 (A3) A pin1index θ Lp 1 8 L e w M detailX bp 0 2.5 5mm scale DIMENSIONS(inchdimensionsarederivedfromtheoriginalmmdimensions) UNIT mAax. A1 A2 A3 bp c D(1) E(1) e HE L Lp Q v w y Z(1) θ 0.25 1.45 0.49 0.25 10.0 4.0 6.2 1.0 0.7 0.7 mm 1.75 0.25 1.27 1.05 0.25 0.25 0.1 0.10 1.25 0.36 0.19 9.8 3.8 5.8 0.4 0.6 0.3 8o 0.010 0.057 0.019 0.0100 0.39 0.16 0.244 0.039 0.028 0.028 0o inches 0.069 0.01 0.05 0.041 0.01 0.01 0.004 0.004 0.049 0.014 0.0075 0.38 0.15 0.228 0.016 0.020 0.012 Note 1.Plasticormetalprotrusionsof0.15mm(0.006inch)maximumpersidearenotincluded. OUTLINE REFERENCES EUROPEAN ISSUEDATE VERSION IEC JEDEC JEITA PROJECTION 99-12-27 SOT109-1 076E07 MS-012 03-02-19 Figure 18. Package outline SOT109-1 (SO16) 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 15 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator SSOP16:plasticshrinksmalloutlinepackage;16leads;bodywidth5.3mm SOT338-1 D E A X c y HE v M A Z 16 9 Q A2 A1 (A3) A pin1index θ Lp L 1 8 detailX w M e bp 0 2.5 5mm scale DIMENSIONS(mmaretheoriginaldimensions) UNIT mAax. A1 A2 A3 bp c D(1) E(1) e HE L Lp Q v w y Z(1) θ 0.21 1.80 0.38 0.20 6.4 5.4 7.9 1.03 0.9 1.00 8o mm 2 0.05 1.65 0.25 0.25 0.09 6.0 5.2 0.65 7.6 1.25 0.63 0.7 0.2 0.13 0.1 0.55 0o Note 1.Plasticormetalprotrusionsof0.25mmmaximumpersidearenotincluded. OUTLINE REFERENCES EUROPEAN ISSUEDATE VERSION IEC JEDEC JEITA PROJECTION 99-12-27 SOT338-1 MO-150 03-02-19 Figure 19. Package outline SOT338-1 (SSOP16) 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 16 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator TSSOP16:plasticthinshrinksmalloutlinepackage;16leads;bodywidth4.4mm SOT403-1 D E A X c y HE v M A Z 16 9 Q A2 (A3) A pin1index A1 θ Lp L 1 8 detailX w M e bp 0 2.5 5mm scale DIMENSIONS(mmaretheoriginaldimensions) UNIT mAax. A1 A2 A3 bp c D(1) E(2) e HE L Lp Q v w y Z(1) θ 0.15 0.95 0.30 0.2 5.1 4.5 6.6 0.75 0.4 0.40 8o mm 1.1 0.05 0.80 0.25 0.19 0.1 4.9 4.3 0.65 6.2 1 0.50 0.3 0.2 0.13 0.1 0.06 0o Notes 1.Plasticormetalprotrusionsof0.15mmmaximumpersidearenotincluded. 2.Plasticinterleadprotrusionsof0.25mmmaximumpersidearenotincluded. OUTLINE REFERENCES EUROPEAN ISSUEDATE VERSION IEC JEDEC JEITA PROJECTION 99-12-27 SOT403-1 MO-153 03-02-18 Figure 20. Package outline SOT403-1 (TSSOP16) 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 17 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 13 Abbreviations Table 10. Abbreviations Acronym Description CMOS Complementary Metal-Oxide Semiconductor DUT Device Under Test ESD ElectroStatic Discharge HBM Human Body Model MM Machine Model 14 Revision history Table 11. Revision history Document ID Release date Data sheet status Change Supersedes notice 74HC4538 v.5 20170317 Product data sheet - 74HC_HCT4538 v.4 Modifications: • Type numbers 74HCT4538D, 74HCT4538DB, 74HCT4538PW removed. • Table 6: Maximum input leakage current for pins 1REXT/CEXT and 2REXT/CEXT changed. 74HC_HCT4538 v.4 20160224 Product data sheet - 74HC_HCT4538 v.3 Modifications: • Type numbers 74HC4538N and 74HCT4538N (SOT38-4) removed. 74HC_HCT4538 v.3 20090608 Product data sheet - 74HC_HCT4538_CNV 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. • Pin names changed throughout. • Section Section 7, Section 8 and Section 9 added, taken from the 74HC/T HCMOS Family characteristics/specification (March 1988). • Test circuit added: Figure 9. • Quick reference data incorporated in to Section 9 and Section 10. • Package information added for DIP16, SO16, SSOP16 and TSSOP16 packages. 74HC_HCT4538_CNV v.2 19970902 Product specification - - 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 18 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator 15 Legal information 15.1 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 URL http://www.nexperia.com. systems or equipment, nor in applications where failure or malfunction of an Nexperia product can reasonably be expected to result in personal 15.2 Definitions injury, death or severe property or environmental damage. Nexperia and its suppliers accept no liability for inclusion and/or use of Nexperia products in Draft — The document is a draft version only. The content is still under such equipment or applications and therefore such inclusion and/or use is at internal review and subject to formal approval, which may result in the customer’s own risk. modifications or additions. Nexperia does not give any representations or warranties as to the accuracy or completeness of information included herein Applications — Applications that are described herein for any of these and shall have no liability for the consequences of use of such information. products are for illustrative purposes only. Nexperia makes no representation or warranty that such applications will be suitable for the specified use Short data sheet — A short data sheet is an extract from a full data sheet without further testing or modification. Customers are responsible for the with the same product type number(s) and title. A short data sheet is design and operation of their applications and products using Nexperia intended for quick reference only and should not be relied upon to contain products, and Nexperia accepts no liability for any assistance with detailed and full information. For detailed and full information see the applications or customer product design. It is customer’s sole responsibility relevant full data sheet, which is available on request via the local Nexperia to determine whether the Nexperia product is suitable and fit for the sales office. In case of any inconsistency or conflict with the short data sheet, customer’s applications and products planned, as well as for the planned the full data sheet shall prevail. application and use of customer’s third party customer(s). Customers should provide appropriate design and operating safeguards to minimize the risks Product specification — The information and data provided in a Product associated with their applications and products. Nexperia does not accept data sheet shall define the specification of the product as agreed between any liability related to any default, damage, costs or problem which is based Nexperia and its customer, unless Nexperia and customer have explicitly on any weakness or default in the customer’s applications or products, or agreed otherwise in writing. In no event however, shall an agreement be the application or use by customer’s third party customer(s). Customer is valid in which the Nexperia product is deemed to offer functions and qualities responsible for doing all necessary testing for the customer’s applications beyond those described in the Product data sheet. and products using Nexperia products in order to avoid a default of the applications and the products or of the application or use by customer’s third party customer(s). Nexperia does not accept any liability in this respect. 15.3 Disclaimers Limiting values — Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent Limited warranty and liability — Information in this document is believed damage to the device. Limiting values are stress ratings only and (proper) to be accurate and reliable. However, Nexperia does not give any operation of the device at these or any other conditions above those representations or warranties, expressed or implied, as to the accuracy given in the Recommended operating conditions section (if present) or the or completeness of such information and shall have no liability for the Characteristics sections of this document is not warranted. Constant or consequences of use of such information. Nexperia takes no responsibility repeated exposure to limiting values will permanently and irreversibly affect for the content in this document if provided by an information source outside the quality and reliability of the device. of Nexperia. In no event shall Nexperia be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interruption, costs related to the removal Terms and conditions of commercial sale — Nexperia products are or replacement of any products or rework charges) whether or not such sold subject to the general terms and conditions of commercial sale, as damages are based on tort (including negligence), warranty, breach of published at http://www.nexperia.com/profile/terms, unless otherwise agreed contract or any other legal theory. Notwithstanding any damages that in a valid written individual agreement. In case an individual agreement is customer might incur for any reason whatsoever, Nexperia's aggregate and concluded only the terms and conditions of the respective agreement shall cumulative liability towards customer for the products described herein shall apply. Nexperia hereby expressly objects to applying the customer’s general be limited in accordance with the Terms and conditions of commercial sale of terms and conditions with regard to the purchase of Nexperia products by Nexperia. customer. Right to make changes — Nexperia reserves the right to make changes No offer to sell or license — Nothing in this document may be interpreted to information published in this document, including without limitation or construed as an offer to sell products that is open for acceptance or specifications and product descriptions, at any time and without notice. This the grant, conveyance or implication of any license under any copyrights, document supersedes and replaces all information supplied prior to the patents or other industrial or intellectual property rights. publication hereof. Export control — This document as well as the item(s) described herein Suitability for use — Nexperia products are not designed, authorized or may be subject to export control regulations. Export might require a prior warranted to be suitable for use in life support, life-critical or safety-critical authorization from competent authorities. 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 19 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator Non-automotive qualified products — Unless this data sheet expressly design and use of the product for automotive applications beyond Nexperia's states that this specific Nexperia product is automotive qualified, the standard warranty and Nexperia's product specifications. product is not suitable for automotive use. It is neither qualified nor tested in accordance with automotive testing or application requirements. Nexperia Translations — A non-English (translated) version of a document is for accepts no liability for inclusion and/or use of non-automotive qualified reference only. The English version shall prevail in case of any discrepancy products in automotive equipment or applications. In the event that customer between the translated and English versions. uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without Nexperia's warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the product for 15.4 Trademarks automotive applications beyond Nexperia's specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies Nexperia Notice: All referenced brands, product names, service names and for any liability, damages or failed product claims resulting from customer trademarks are the property of their respective owners. 74HC4538 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2017. All rights reserved. Product data sheet Rev. 5 — 17 March 2017 20 / 21

Nexperia 74HC4538 Dual retriggerable precision monostable multivibrator Contents 1 General description ............................................1 2 Features and benefits .........................................1 3 Ordering information ..........................................2 4 Functional diagram .............................................2 5 Pinning information ............................................4 5.1 Pinning ...............................................................4 5.2 Pin description ...................................................4 6 Functional description ........................................5 7 Limiting values ....................................................6 8 Recommended operating conditions ................6 9 Static characteristics ..........................................7 10 Dynamic characteristics .....................................8 10.1 Waveforms and test circuit ..............................10 11 Application information ....................................12 11.1 Power-down considerations .............................12 11.2 Graphs .............................................................12 12 Package outline .................................................15 13 Abbreviations ....................................................18 14 Revision history ................................................18 15 Legal information ..............................................19 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section 'Legal information'. © 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: 17 March 2017 Document identifier: 74HC4538