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TC74HC123AF

Public Made by Adom

by adom

TOSHIBA Monostable Multivibrators, SOP-16. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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TC74HC123AF

TOSHIBA · Monostable Multivibrators · SOP-16

TC74HC123AF from TOSHIBA, in a SOP-16. 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 1A_N input Schmitt-trigger negative-edge trigger input A for circuit 1; VIH min 1.5/3.15/4.20 V, VIL max 0.50/1.35/1.80 V at VCC = 2/4.5/6 V.
2 1B input Schmitt-trigger positive-edge trigger input B for circuit 1; VIH min 1.5/3.15/4.20 V, VIL max 0.50/1.35/1.80 V at VCC = 2/4.5/6 V.
3 1CLR_N input Active-low clear (reset) input for circuit 1; holds Q low when asserted; tr/tf ≤ 1000/500/400 ns at VCC = 2/4.5/6 V.
4 1Q_N output Complementary monostable output for circuit 1; VOH ≥ 4.13 V, VOL ≤ 0.33 V at IOH/IOL = 4 mA, VCC = 4.5 V.
5 2Q output True monostable output for circuit 2; VOH ≥ 4.13 V, VOL ≤ 0.33 V at IOH/IOL = 4 mA, VCC = 4.5 V.
6 2Cx passive External timing capacitor (Cx) connection for circuit 2; capacitor between this pin and GND sets pulse width twOUT = 1.0 × Cx × Rx.
7 2Rx_Cx passive External resistor/capacitor timing node for circuit 2; Rx ≥ 5 kΩ at VCC = 2 V, ≥ 1 kΩ at VCC ≥ 3 V; off-state leakage ±1.0 μA max.
8 GND power_in Ground reference; DC VCC/GND current ±50 mA absolute maximum.
9 2A_N input Schmitt-trigger negative-edge trigger input A for circuit 2; VIH min 1.5/3.15/4.20 V, VIL max 0.50/1.35/1.80 V at VCC = 2/4.5/6 V.
10 2B input Schmitt-trigger positive-edge trigger input B for circuit 2; VIH min 1.5/3.15/4.20 V, VIL max 0.50/1.35/1.80 V at VCC = 2/4.5/6 V.
11 2CLR_N input Active-low clear (reset) input for circuit 2; holds Q low when asserted; tr/tf ≤ 1000/500/400 ns at VCC = 2/4.5/6 V.
12 2Q_N output Complementary monostable output for circuit 2; VOH ≥ 4.13 V, VOL ≤ 0.33 V at IOH/IOL = 4 mA, VCC = 4.5 V.
13 1Q output True monostable output for circuit 1; VOH ≥ 4.13 V, VOL ≤ 0.33 V at IOH/IOL = 4 mA, VCC = 4.5 V.
14 1Cx passive External timing capacitor (Cx) connection for circuit 1; capacitor between this pin and GND sets pulse width twOUT = 1.0 × Cx × Rx.
15 1Rx_Cx passive External resistor/capacitor timing node for circuit 1; Rx ≥ 5 kΩ at VCC = 2 V, ≥ 1 kΩ at VCC ≥ 3 V; off-state leakage ±1.0 μA max.
16 VCC power_in Positive supply voltage; operating range 2 to 6 V, absolute maximum 7 V; quiescent ICC ≤ 40 μA, active ICC' ≤ 1300 μA at VCC = 6 V.

Key specifications

Parameter Value
Manufacturer TOSHIBA
Package SOP-16
Category Logic
Pins 16

CAD (KiCad official)

  • Symbol: TC74HC123AF
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOP-16 (KiCad packages3D, STEP)
  • 3D model files: tc74hc123af-etched.step / tc74hc123af-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tc74hc123af.step / tc74hc123af.glb are the bare package body.

Provenance

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

  • Datasheet: TOSHIBA datasheet (13 pp, sha256 c52e6521ca081831, retrieved 2026-09-29, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF