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74VHC123AMX

Public Made by Adom

by adom

onsemi Monostable Multivibrators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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74VHC123AMX

onsemi · Monostable Multivibrators · SOIC-16

74VHC123AMX from onsemi, in a SOIC-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 input Negative-edge trigger input of multivibrator 1; can be used as an inhibit input.
2 1B input Positive-edge trigger input of multivibrator 1; can be used as an inhibit input.
3 1CLR input Active-low reset input of multivibrator 1; a LOW resets the one-shot, and a rising edge can trigger it while A is LOW and B is HIGH.
4 1Q̄ output Complementary output of multivibrator 1.
5 2Q output Output of multivibrator 2.
6 2Cx passive External capacitor connection for multivibrator 2; Cx has no limit.
7 2Rx/Cx passive External resistor/capacitor common node for multivibrator 2; Rx must be >5kΩ at VCC=2.0V and >1kΩ at VCC>3.0V.
8 GND power_in Ground.
9 2A input Negative-edge trigger input of multivibrator 2; can be used as an inhibit input.
10 2B input Positive-edge trigger input of multivibrator 2; can be used as an inhibit input.
11 2CLR input Active-low reset input of multivibrator 2; a LOW resets the one-shot, and a rising edge can trigger it while A is LOW and B is HIGH.
12 2Q̄ output Complementary output of multivibrator 2.
13 1Q output Output of multivibrator 1.
14 1Cx passive External capacitor connection for multivibrator 1; Cx has no limit.
15 1Rx/Cx passive External resistor/capacitor common node for multivibrator 1; Rx must be >5kΩ at VCC=2.0V and >1kΩ at VCC>3.0V.
16 VCC power_in Supply voltage, recommended 2.0V to 5.5V (absolute maximum -0.5V to +7.0V).

Key specifications

Parameter Value
Manufacturer onsemi
Package SOIC-16
Category Logic
Pins 16

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 (absolute maximum) VCC -0.5 7 V 6
DC input voltage (absolute maximum) VIN -0.5 7 V 6
Input diode current (absolute maximum) IIK -20 mA 6
Output diode current (absolute maximum) IOK -20 20 mA 6
DC output current (absolute maximum) IOUT -25 25 mA 6
DC VCC/GND current (absolute maximum) ICC -50 50 mA 6
Storage temperature (absolute maximum) TSTG -65 150 °C 6
Supply voltage (recommended operating) VCC 2 5.5 V 6
Input voltage (recommended operating) VIN 0 5.5 V 6
Operating temperature TOPR -40 85 °C 6
Input rise and fall time (CLR only) tr, tf 0 100 ns/V VCC = 3.3 V ± 0.3 V 6
Input rise and fall time (CLR only) tr, tf 0 20 ns/V VCC = 5.0 V ± 0.5 V 6
External resistor Rx Rx 5 kΩ VCC = 2.0 V 6
External resistor Rx Rx 1 kΩ VCC > 3.0 V 6
HIGH level input voltage VIH 1.5 V VCC = 2.0 V; TA = -40 to 85°C 7
HIGH level input voltage VIH 0.7 x VCC VCC = 3.0 to 5.5 V; TA = -40 to 85°C 7
LOW level input voltage VIL 0.5 V VCC = 2.0 V; TA = -40 to 85°C 7
LOW level input voltage VIL 0.3 x VCC VCC = 3.0 to 5.5 V; TA = -40 to 85°C 7
HIGH level output voltage VOH 1.9 2 V VCC = 2.0 V; VIN = VIH or VIL; IOH = -50µA; TA = -40 to 85°C 7
HIGH level output voltage VOH 2.9 3 V VCC = 3.0 V; VIN = VIH or VIL; IOH = -50µA; TA = -40 to 85°C 7
HIGH level output voltage VOH 4.4 4.5 V VCC = 4.5 V; VIN = VIH or VIL; IOH = -50µA; TA = -40 to 85°C 7
HIGH level output voltage VOH 2.48 V VCC = 3.0 V; VIN = VIH or VIL; IOH = -4mA; TA = -40 to 85°C 7
HIGH level output voltage VOH 3.8 V VCC = 4.5 V; VIN = VIH or VIL; IOH = -8mA; TA = -40 to 85°C 7
LOW level output voltage VOL 0 0.1 V VCC = 2.0 V; VIN = VIH or VIL; IOL = 50µA; TA = -40 to 85°C 7
LOW level output voltage VOL 0.44 V VCC = 3.0 V; VIN = VIH or VIL; IOL = 4mA; TA = -40 to 85°C 7
Input leakage current IIN -1 1 µA VIN = 5.5 V or GND; VCC = 0-5.5 V; TA = -40 to 85°C 7
Rx/Cx terminal off-state current IIN -2.5 2.5 µA VCC = 5.5 V; VIN = VCC or GND; TA = -40 to 85°C 7
Quiescent supply current ICC 40 µA VCC = 5.5 V; VIN = VCC or GND; TA = -40 to 85°C 7
Active-state supply current (per circuit) ICC 160 280 µA VCC = 3.0 V; VIN = VCC or GND; Rx/Cx = 0.5 VCC; TA = -40 to 85°C 7
Active-state supply current (per circuit) ICC 380 650 µA VCC = 4.5 V; VIN = VCC or GND; Rx/Cx = 0.5 VCC; TA = -40 to 85°C 7
Propagation delay (A, B to Q, Q̅) tPLH, tPHL 1 13.4 24 ns VCC = 3.3 ± 0.3 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (A, B to Q, Q̅) tPLH, tPHL 1 15.9 27.5 ns VCC = 3.3 ± 0.3 V; CL = 50 pF; TA = -40 to 85°C 8
Propagation delay (A, B to Q, Q̅) tPLH, tPHL 1 8.1 14 ns VCC = 5.0 ± 0.5 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (A, B to Q, Q̅) tPLH, tPHL 1 9.6 16 ns VCC = 5.0 ± 0.5 V; CL = 50 pF; TA = -40 to 85°C 8
Propagation delay (CLR trigger to Q, Q̅) tPLH, tPHL 1 14.5 26 ns VCC = 3.3 ± 0.3 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (CLR trigger to Q, Q̅) tPLH, tPHL 1 17 29.5 ns VCC = 3.3 ± 0.3 V; CL = 50 pF; TA = -40 to 85°C 8
Propagation delay (CLR trigger to Q, Q̅) tPLH, tPHL 1 8.7 15 ns VCC = 5.0 ± 0.5 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (CLR trigger to Q, Q̅) tPLH, tPHL 1 10.2 17 ns VCC = 5.0 ± 0.5 V; CL = 50 pF; TA = -40 to 85°C 8
Propagation delay (CLR to Q, Q̅) tPLH, tPHL 1 10.3 18.5 ns VCC = 3.3 ± 0.3 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (CLR to Q, Q̅) tPLH, tPHL 1 12.8 22 ns VCC = 3.3 ± 0.3 V; CL = 50 pF; TA = -40 to 85°C 8
Propagation delay (CLR to Q, Q̅) tPLH, tPHL 1 6.3 11 ns VCC = 5.0 ± 0.5 V; CL = 15 pF; TA = -40 to 85°C 8
Propagation delay (CLR to Q, Q̅) tPLH, tPHL 1 7.8 13 ns VCC = 5.0 ± 0.5 V; CL = 50 pF; TA = -40 to 85°C 8
Output pulse width tWOUT 160 300 ns VCC = 3.3 ± 0.3 V; CL = 50 pF; Cx = 28 pF; Rx = 2 kΩ; TA = -40 to 85°C 8
Output pulse width tWOUT 133 240 ns VCC = 5.0 ± 0.5 V; CL = 50 pF; Cx = 28 pF; Rx = 2 kΩ; TA = -40 to 85°C 8
Output pulse width tWOUT 90 100 110 µs VCC = 3.3 ± 0.3 V; CL = 50 pF; Cx = 0.01 µF; Rx = 10 kΩ; TA = -40 to 85°C 8
Output pulse width tWOUT 0.9 1 1.1 ms VCC = 3.3 ± 0.3 V; CL = 50 pF; Cx = 0.1 µF; Rx = 1 kΩ; TA = -40 to 85°C 8
Output pulse width error between circuits (same package) ΔtWOUT -1 1 % Between circuits (in same package) 8
Minimum trigger pulse width tW(L), tW(H) 5 ns VCC = 3.3 V 9
Minimum clear pulse width tW(L) 5 ns VCC = 3.3 V 9
Minimum retrigger time tRR 60 ns VCC = 3.3 ± 0.3 V; Rx = 1 kΩ; Cx = 100 pF 9
Minimum retrigger time tRR 39 ns VCC = 5.0 ± 0.5 V; Rx = 1 kΩ; Cx = 100 pF 9
Minimum retrigger time tRR 1.5 µs VCC = 3.3 V; Rx = 1 kΩ; Cx = 0.01 µF 9
Minimum retrigger time tRR 1.2 µs VCC = 5.0 V; Rx = 1 kΩ; Cx = 0.01 µF 9

CAD (KiCad official)

  • Symbol: 74VHC123AMX
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: 74vhc123amx-etched.step / 74vhc123amx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 74vhc123amx.step / 74vhc123amx.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (14 pp, sha256 83f1f5557ec7ba1b, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), 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