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74HC126D

Public Made by Adom

by adom

Nexperia Buffers, Drivers, Receivers, Transceivers, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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74HC126D

Nexperia · Buffers, Drivers, Receivers, Transceivers · SOIC-14

74HC126D from Nexperia, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 1OE input Data enable input for buffer 1, active HIGH; a LOW on nOE puts the output in the high-impedance OFF-state.
2 1A input Data input for buffer 1; inputs include clamp diodes so current-limiting resistors can interface voltages above VCC.
3 1Y tri_state Data output for buffer 1, 3-state output that becomes high-impedance when nOE is LOW.
4 2OE input Data enable input for buffer 2, active HIGH; a LOW on nOE puts the output in the high-impedance OFF-state.
5 2A input Data input for buffer 2; inputs include clamp diodes so current-limiting resistors can interface voltages above VCC.
6 2Y tri_state Data output for buffer 2, 3-state output that becomes high-impedance when nOE is LOW.
7 GND power_in Ground (0 V) reference for all voltages.
8 3Y tri_state Data output for buffer 3, 3-state output that becomes high-impedance when nOE is LOW.
9 3A input Data input for buffer 3; inputs include clamp diodes so current-limiting resistors can interface voltages above VCC.
10 3OE input Data enable input for buffer 3, active HIGH; a LOW on nOE puts the output in the high-impedance OFF-state.
11 4Y tri_state Data output for buffer 4, 3-state output that becomes high-impedance when nOE is LOW.
12 4A input Data input for buffer 4; inputs include clamp diodes so current-limiting resistors can interface voltages above VCC.
13 4OE input Data enable input for buffer 4, active HIGH; a LOW on nOE puts the output in the high-impedance OFF-state.
14 VCC power_in Supply voltage; recommended 2.0 V to 6.0 V for 74HC126 and 4.5 V to 5.5 V for 74HCT126, absolute maximum 7 V.

Key specifications

Parameter Value
Manufacturer Nexperia
Package SOIC-14
Category Logic
Pins 14

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage VCC 2 5 6 V 74HC126 4
Input voltage VI 0 V maximum is VCC 4
Output voltage VO 0 V maximum is VCC 4
Ambient temperature Tamb -40 25 125 °C 4
Input transition rise and fall rate Δt/ΔV 625 ns/V VCC = 2.0 V 4
Input transition rise and fall rate Δt/ΔV 1.67 139 ns/V VCC = 4.5 V 4
Input transition rise and fall rate Δt/ΔV 83 ns/V VCC = 6.0 V 4
Supply voltage VCC -0.5 7 V 3
Input clamping current IIK -20 20 mA VI < -0.5 V or VI > VCC + 0.5 V 3
Output clamping current IOK -20 20 mA VO < -0.5 V or VO > VCC + 0.5 V 3
Output current IO -35 35 mA -0.5 V < VO < VCC + 0.5 V 3
Supply current ICC 70 mA 3
Ground current IGND -70 mA 3
Storage temperature Tstg -65 150 °C 3
Total power dissipation Ptot 500 mW Tamb = -40 °C to +125 °C 3
HIGH-level input voltage VIH 1.5 1.2 V VCC = 2.0 V 4
HIGH-level input voltage VIH 3.15 2.4 V VCC = 4.5 V 4
HIGH-level input voltage VIH 4.2 3.2 V VCC = 6.0 V 4
LOW-level input voltage VIL 0.8 0.5 V VCC = 2.0 V 4
LOW-level input voltage VIL 2.1 1.35 V VCC = 4.5 V 4
LOW-level input voltage VIL 2.8 1.8 V VCC = 6.0 V 4
HIGH-level output voltage VOH 1.9 2 V VI = VIH or VIL; IO = -20 μA; VCC = 2.0 V 4
HIGH-level output voltage VOH 4.4 4.5 V VI = VIH or VIL; IO = -20 μA; VCC = 4.5 V 4
HIGH-level output voltage VOH 5.9 6 V VI = VIH or VIL; IO = -20 μA; VCC = 6.0 V 4
HIGH-level output voltage VOH 3.98 4.32 V VI = VIH or VIL; IO = -6.0 mA; VCC = 4.5 V 4
HIGH-level output voltage VOH 5.48 5.81 V VI = VIH or VIL; IO = -7.8 mA; VCC = 6.0 V 4
LOW-level output voltage VOL 0 0.1 V VI = VIH or VIL; IO = 20 μA; VCC = 2.0 V 4
LOW-level output voltage VOL 0.15 0.26 V VI = VIH or VIL; IO = 6.0 mA; VCC = 4.5 V 4
LOW-level output voltage VOL 0.16 0.26 V VI = VIH or VIL; IO = 7.8 mA; VCC = 6.0 V 4
Input leakage current II -0.1 0.1 μA VI = VCC or GND; VCC = 6.0 V 4
OFF-state output current IOZ -0.5 0.5 μA VI = VIH or VIL; VCC = 6.0 V; VO = VCC or GND 4
Supply current ICC 8 μA VI = VCC or GND; IO = 0 A; VCC = 6.0 V 4
Propagation delay nA to nY tpd 30 100 ns nA to nY; see Fig. 4; VCC = 2.0 V 5
Propagation delay nA to nY tpd 11 20 ns nA to nY; see Fig. 4; VCC = 4.5 V 5
Propagation delay nA to nY tpd 9 17 ns nA to nY; see Fig. 4; VCC = 6.0 V 5
Enable time nOE to nY ten 41 125 ns nOE to nY; see Fig. 5; VCC = 2.0 V 5
Enable time nOE to nY ten 15 25 ns nOE to nY; see Fig. 5; VCC = 4.5 V 5
Enable time nOE to nY ten 12 21 ns nOE to nY; see Fig. 5; VCC = 6.0 V 5
Disable time nOE to nY tdis 41 125 ns nOE to nY; see Fig. 5; VCC = 2.0 V 5
Disable time nOE to nY tdis 15 25 ns nOE to nY; see Fig. 5; VCC = 4.5 V 5
Disable time nOE to nY tdis 12 21 ns nOE to nY; see Fig. 5; VCC = 6.0 V 5
Transition time tt 14 60 ns see Fig. 4; VCC = 2.0 V 6
Transition time tt 5 12 ns see Fig. 4; VCC = 4.5 V 6
Transition time tt 4 10 ns see Fig. 4; VCC = 6.0 V 6
Input capacitance CI 3.5 pF 5

CAD (KiCad official)

  • Symbol: 74HC126D
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOIC-14 (KiCad packages3D, STEP)
  • 3D model files: 74hc126d-etched.step / 74hc126d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74hc126d.step / 74hc126d.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Nexperia datasheet (13 pp, sha256 9ba79df1ac62551b, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus off (skipped (clean text read)), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF