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SN74AHC123AMDREP
Public Made by Adomby adom
Texas Instruments Monostable Multivibrators, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSN74AHC123AMDREP
Texas Instruments · Monostable Multivibrators · SOIC-16
SN74AHC123AMDREP from Texas Instruments, 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 | Gated low-level-active trigger input of multivibrator 1; Schmitt-trigger input with hysteresis for slow input transitions. |
| 2 | 1B | input | Gated high-level-active trigger input of multivibrator 1; Schmitt-trigger input with hysteresis for slow input transitions. |
| 3 | 1CLR | input | Active-high clear input of multivibrator 1 that terminates the output pulse early; Schmitt-trigger input. |
| 4 | 1Q | output | Output of multivibrator 1 that is low during power-up and goes high at the end of the programmed pulse. |
| 5 | 2Q | output | Output of multivibrator 2 that is low during power-up and goes high at the end of the programmed pulse. |
| 6 | 2Cext | passive | External timing capacitor terminal of multivibrator 2; capacitor connects between Cext and Rext/Cext. |
| 7 | 2Rext/Cext | passive | Timing resistor/capacitor terminal of multivibrator 2; external resistor connects between Rext/Cext and VCC. |
| 8 | GND | power_in | Ground reference for the device, with the operating supply range of 2 V to 5.5 V referenced to it. |
| 9 | 2A | input | Gated low-level-active trigger input of multivibrator 2; Schmitt-trigger input with hysteresis for slow input transitions. |
| 10 | 2B | input | Gated high-level-active trigger input of multivibrator 2; Schmitt-trigger input with hysteresis for slow input transitions. |
| 11 | 2CLR | input | Active-high clear input of multivibrator 2 that terminates the output pulse early; Schmitt-trigger input. |
| 12 | 2Q-bar | output | Complementary output of multivibrator 2 that is high during power-up and goes low at the end of the programmed pulse. |
| 13 | 1Q | output | Complementary output of multivibrator 1 that is high during power-up and goes low at the end of the programmed pulse. |
| 14 | 1Cext | passive | External timing capacitor terminal of multivibrator 1; capacitor connects between Cext and Rext/Cext. |
| 15 | 1Rext/Cext | passive | Timing resistor/capacitor terminal of multivibrator 1; external resistor connects between Rext/Cext and VCC. |
| 16 | VCC | power_in | Supply voltage input with an operating range of 2 V to 5.5 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic ICs |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74AHC123AMDREP - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74ahc123amdrep-etched.step/sn74ahc123amdrep-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74ahc123amdrep.step/sn74ahc123amdrep.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (18 pp, sha256
987996f5646ffa3b, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).