component
SN74HC123DR
Public Made by Adomby adom
lingxingic Monostable Multivibrators, SOP-16. Datasheet-verified pinout, 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
markdownSN74HC123DR
lingxingic · Monostable Multivibrators · SOP-16
SN74HC123DR from lingxingic, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1A̅ | input | Falling edge trigger input for first monostable; high-to-low transitions initiate output pulse generation. |
| 2 | 1B | input | Rising edge trigger input for first monostable; low-to-high transitions can extend output pulse width during operation. |
| 3 | 1RD̅ | input | Active-low asynchronous reset input for first monostable; low level immediately terminates output pulse. |
| 4 | 1Q̅ | output | Active-low output of first monostable; complements 1Q with low during pulse duration. |
| 5 | 2Q | output | Active-high output of second monostable; goes high during and after trigger event. |
| 6 | 2CEXT | passive | External timing capacitor connection for second monostable; forms RC network with 2REXT/CEXT pin to determine pulse width. |
| 7 | 2REXT/CEXT | passive | External timing resistor connection for second monostable; output pulse width determined by tW = K × REXT × CEXT relationship. |
| 8 | GND | power_in | Ground reference (0V) for all circuit operations. |
| 9 | 2A̅ | input | Falling edge trigger input for second monostable; high-to-low transitions initiate output pulse generation. |
| 10 | 2B | input | Rising edge trigger input for second monostable; low-to-high transitions can extend output pulse width during operation. |
| 11 | 2RD̅ | input | Active-low asynchronous reset input for second monostable; low level immediately terminates output pulse. |
| 12 | 2Q̅ | output | Active-low output of second monostable; complements 2Q with low during pulse duration. |
| 13 | 1Q | output | Active-high output of first monostable; goes high during and after trigger event. |
| 14 | 1CEXT | passive | External timing capacitor connection for first monostable; forms RC network with 1REXT/CEXT pin to determine pulse width. |
| 15 | 1REXT/CEXT | passive | External timing resistor connection for first monostable; output pulse width determined by tW = K × REXT × CEXT relationship. |
| 16 | VCC | power_in | Positive power supply voltage; recommended operating range 2.0V to 6.0V with 5.0V typical. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | lingxingic |
| Package | SOP-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74HC123DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files:
sn74hc123dr-etched.step/sn74hc123dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc123dr.step/sn74hc123dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: lingxingic datasheet (27 pp, sha256
4c319fa4eeb6aac0, retrieved 2026-09-22, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-4-6(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).