M74HC126 Quad bus buffer (3-state) Datasheet - production data • Balanced propagation delays: ≅ t t PLH PHL • Wide operating voltage range: V (opr) = 2 V to 6 V CC • Pin and function compatible with 74 series 126 • ESD performance SO14 TSSOP14 – CDM: 1 kV – HBM: 2 kV – MM: 200 V Features Description • High-speed: t = 8 ns (typ.) at V = 6 V The M74HC126 is a high-speed CMOS quad PD CC • Low power dissipation: buffer (3-state) fabricated with silicon gate I = 4 μA (max.) at T = 25 °C C2MOS technology. CC A • High noise immunity: The device requires the 3-state control input, G, to V = V = 28 % V (min) be set high to place the output into high NIH NIL CC impedance state. • Symmetrical output impedance: |I | = I = 6 mA (min.) All inputs are equipped with protection circuits OH OL against static discharge and transient excess voltage. Table 1. Device summary Order code Temp. range Package Packaging Marking M74HC126RM13TR -55 °C to 125 °C S014 74HC126 M74HC126YRM13TR(1) -40 °C to 125 °C SO14 (automotive grade) 74HC126Y Tape and reel M74HC126TTR -55 °C to 125 °C TSSOP14 HC126 M74HC126YTTR(1) -40 °C to 125 °C TSSOP14 (automotive grade) HC126Y 1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 and Q002 or equivalent. December 2013 DocID8021 Rev 3 1/14 This is information on a product in full production. www.st.com

Contents M74HC126 Contents 1 Pin information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.1 SO14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.2 TSSOP14 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 DocID8021 Rev 3

M74HC126 Pin information 1 Pin information Figure 1. Pin connection and IED logic symbols GAMS1212131410CB Table 2. Pin description Pin no Symbol Name and function 1, 4, 10, 13 1G to 4G Output enable input 2, 5, 9, 12 1A to 4A Data inputs 3, 6, 8, 11 1Y to 4Y Data outputs 7 GND Ground (0 V) 14 V Positive supply voltage CC DocID8021 Rev 3 3/14 14

Functional description M74HC126 2 Functional description Table 3. Truth table A G Y X L Z L H L H H H Figure 2. Input and output equivalent circuit V V CC CC Output Input GND GND 4/14 DocID8021 Rev 3

M74HC126 Electrical characteristics 3 Electrical characteristics “Absolute maximum ratings” are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 4. Absolute maximum ratings Symbol Parameter Value Unit V Supply voltage -0.5 to +7 CC V DC input voltage V I -0.5 to V + 0.5 CC V DC output voltage O I DC input diode current IK ± 20 I DC output diode current OK I DC output current ± 35 mA O I or CC DC V or ground current ± 70 I CC GND P Power dissipation 500(1) mW D T Storage temperature -65 to +150 stg °C T Lead temperature (10 sec) 300 L 1. 500 mW at 65 °C; derate to 300 mW by 10 mW/°C from 65 °C to 85 °C Table 5. Recommended operating conditions Symbol Parameter Value Unit V Supply voltage 2 to 6 CC V Input voltage V I 0 to V CC V Output voltage O T Operating temperature -55 to 125 °C op VCC = 2.0 V 0 to 1000 tr, tf Input rise and fall time VCC = 4.5V 0 to 500 ns VCC = 6.0 V 0 to 400 DocID8021 Rev 3 5/14 14

Electrical characteristics M74HC126 Table 6. DC specifications Test condition Value Symbol Parameter T = 25 °C -40 to 85 °C -55 to 125 °C Unit V A CC (V) Min. Typ. Max. Min. Max. Min. Max. 2.0 1.5 1.5 1.5 High level input V 4.5 3.15 3.15 3.15 V IH voltage 6.0 4.2 4.2 4.2 2.0 0.5 0.5 0.5 Low level input V 4.5 1.35 1.35 1.35 V IL voltage 6.0 1.8 1.8 1.8 2.0 I = -20 μA 1.9 2.0 1.9 1.9 O 4.5 I = -20 μA 4.4 4.5 4.4 4.4 O High level output V 6.0 I = -20 μA 5.9 6.0 5.9 5.9 V OH voltage O 4.5 I = -6.0 mA 4.18 4.31 4.13 4.10 O 6.0 I = -7.8 mA 5.68 5.8 5.63 5.60 O 2.0 I = 20 μA 0.0 0.1 0.1 0.1 O 4.5 I = 20 μA 0.0 0.1 0.1 0.1 O Low level output V 6.0 I = 20 μA 0.0 0.1 0.1 0.1 V OL voltage O 4.5 I = 6.0 mA 0.17 0.26 0.33 0.40 O 6.0 I = 7.8 mA 0.18 0.26 0.33 0.40 O Input leakage I 6.0 V = V or GND ± 0.1 ± 1 ± 1 μA I current I CC High impedance V = V or V I output leakage 6.0 I IH IL ± 0.5 ± 5 ± 10 μA OZ V = V or GND current O CC Quiescent supply I 6.0 V = V or GND 4 40 80 μA CC current I CC 6/14 DocID8021 Rev 3

M74HC126 Electrical characteristics Table 7. AC electrical characteristics (Input t = t = 6 ns) r f Test condition Value Symbol Parameter T = 25 °C -40 to 85 °C -55 to 125 °C Unit V C A CC L (V) (pF) Min. Typ. Max. Min. Max. Min. Max. 2.0 20 60 75 90 Output transition t ,t 4.5 50 6 12 15 18 ns TLH THL time 6.0 5 10 13 15 2.0 36 75 95 110 4.5 50 9 15 19 22 ns Propagation 6.0 8 13 16 19 t , t PLH PHL delay time 2.0 52 105 130 160 4.5 150 13 21 26 32 ns 6.0 11 18 22 27 - - - 2.0 36 75 95 110 4.5 50 9 15 19 22 ns High impedance 6.0 8 13 16 19 tPZL, tPZH output enable RL = 1 kΩ time 2.0 52 105 130 160 4.5 150 13 21 26 32 ns 6.0 11 18 22 27 2.0 48 80 100 120 High impedance tPLZ, tPHZ output disable 4.5 50 RL = 1 kΩ 12 16 20 24 ns time 6.0 10 14 17 20 Table 8. Capacitive characteristics Test Value condition Sym Parameter Unit T = 25°C -40 to 85 °C -55 to 125 °C V A CC (V) Min Typ Max Min Max Min Max C Input capacitance 5 10 10 10 IN 5.0 - - - pF Power dissipation C 35 PD capacitance(1) 1. C is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current PD consumption without load (refer to test circuit). Average operating current can be obtained by the following equation: I = C x V x f + I /4(per buffer). CC(opr) PD CC IN CC DocID8021 Rev 3 7/14 14

Electrical characteristics M74HC126 Figure 3. Test circuit GAMS1212131502CB 1. Legend: C = 50 pF/150 pF or equivalent (includes jig and probe capacitance). L R = 1 kΩ or equivalent. 1 R = Z of pulse generator (typically 50 Ω). T OUT Table 9. Propagation delay time configuration Test Switch t , t Open PLH PHL t , t V PZL PLZ CC t , t GND PZH PHZ 8/14 DocID8021 Rev 3

M74HC126 Electrical characteristics Figure 4. Waveform 1: propagation delay times (f = 1 MHz; 50 % duty cycle) GAMS1212131506CB Figure 5. Waveform 2: Output enable and disable times (f = 1 MHz; 50 % duty cycle) GAMS1212131517CB DocID8021 Rev 3 9/14 14

Package information M74HC126 4 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 10/14 DocID8021 Rev 3

M74HC126 Package information 4.1 SO14 package information Figure 6. SO14 package mechanical drawing (cid:47) (cid:42) (cid:38) (cid:70)(cid:20) (cid:68)(cid:21) (cid:36) (cid:69) (cid:72) (cid:68)(cid:20) (cid:69)(cid:20) (cid:54) (cid:72)(cid:22) (cid:40) (cid:39) (cid:48) (cid:20)(cid:23) (cid:27) (cid:41) (cid:20) (cid:26) (cid:42)(cid:36)(cid:48)(cid:54)(cid:19)(cid:24)(cid:19)(cid:21)(cid:20)(cid:22)(cid:20)(cid:19)(cid:21)(cid:26)(cid:38)(cid:37) Table 10. SO14 package mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45 ° 45 ° D 8.55 8.75 0.336 0.344 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M 0.68 0.026 S 8 ° 8 ° DocID8021 Rev 3 11/14 14

Package information M74HC126 4.2 TSSOP14 package information Figure 7. TSSOP14 package mechanical drawing (cid:36) (cid:36)(cid:21) (cid:46) (cid:47) (cid:36)(cid:20) (cid:69) (cid:72) (cid:70) (cid:40) (cid:39) (cid:40)(cid:20) (cid:51)(cid:44)(cid:49)(cid:3)(cid:20)(cid:3)(cid:44)(cid:39)(cid:40)(cid:49)(cid:55)(cid:44)(cid:41)(cid:44)(cid:38)(cid:36)(cid:55)(cid:44)(cid:50)(cid:49) (cid:20) (cid:42)(cid:36)(cid:48)(cid:54)(cid:19)(cid:26)(cid:19)(cid:27)(cid:20)(cid:22)(cid:20)(cid:24)(cid:20)(cid:21)(cid:38)(cid:37) Table 11. TSSOP14 package mechanical data Dimensions Ref Millimeters Inches Min. Typ. Max. Min. Typ. Max. A 1.2 0.047 A1 0.05 0.15 0.002 0.004 0.006 A2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0089 D 4.9 5 5.1 0.193 0.197 0.201 E 6.2 6.4 6.6 0.244 0.252 0.260 E1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 0.0256 K 0 ° 8 ° 0 ° 8 ° L 0.45 0.60 0.75 0.018 0.024 0.030 12/14 DocID8021 Rev 3

M74HC126 Ordering information 5 Ordering information Table 12. Order codes Order code Temp. range Package Packaging Marking M74HC126RM13TR -55 °C to 125 °C S014 74HC126 M74HC126YRM13TR(1) -40 °C to 125 °C SO14 (automotive grade) 74HC126Y Tape and reel M74HC126TTR -55 °C to 125 °C TSSOP14 HC126 M74HC126YTTR(1) -40 °C to 125 °C TSSOP14 (automotive grade) HC126Y 1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC Q001 and Q002 or equivalent. 6 Revision history Table 13. Document revision history Date Revision Changes Aug-2001 1 Initial release. Removed DIP14 package Features: added ESD information 13-Dec-2013 3 Table 1: Device summary: updated order codes, added automotive grade order codes, added temperature range and marking details. Added Section 5: Ordering information. DocID8021 Rev 3 13/14 14

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