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SN74128D
Public Made by Adomby adom
Texas Instruments Logic Gates, SOIC-14. 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
markdownSN74128D
Texas Instruments · Logic Gates · SOIC-14
SN74128D from Texas Instruments, 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 | 1Y | output | Driver 1 output, NOR of 1A and 1B, designed to drive 50 ohm lines (IOL max 48 mA, IOH max -42.4 mA for SN74128). |
| 2 | 1A | input | Driver 1 input A, VIH min 2 V and VIL max 0.8 V. |
| 3 | 1B | input | Driver 1 input B, VIH min 2 V and VIL max 0.8 V. |
| 4 | 2Y | output | Driver 2 output, NOR of 2A and 2B, designed to drive 50 ohm lines (IOL max 48 mA, IOH max -42.4 mA for SN74128). |
| 5 | 2A | input | Driver 2 input A, VIH min 2 V and VIL max 0.8 V. |
| 6 | 2B | input | Driver 2 input B, VIH min 2 V and VIL max 0.8 V. |
| 7 | GND | power_in | Ground; supply voltage values are specified with respect to this network ground terminal. |
| 8 | 3A | input | Driver 3 input A, VIH min 2 V and VIL max 0.8 V. |
| 9 | 3B | input | Driver 3 input B, VIH min 2 V and VIL max 0.8 V. |
| 10 | 3Y | output | Driver 3 output, NOR of 3A and 3B, designed to drive 50 ohm lines (IOL max 48 mA, IOH max -42.4 mA for SN74128). |
| 11 | 4A | input | Driver 4 input A, VIH min 2 V and VIL max 0.8 V. |
| 12 | 4B | input | Driver 4 input B, VIH min 2 V and VIL max 0.8 V. |
| 13 | 4Y | output | Driver 4 output, NOR of 4A and 4B, designed to drive 50 ohm lines (IOL max 48 mA, IOH max -42.4 mA for SN74128). |
| 14 | VCC | power_in | Supply voltage, 4.75 V to 5.25 V recommended for SN74128 (absolute max 7 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Logic |
| Pins | 14 |
CAD (KiCad official)
- Symbol:
SN74128D - Footprint:
Package_SO:SOIC-14_3.9x8.7mm_P1.27mm - 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files:
sn74128d-etched.step/sn74128d-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74128d.step/sn74128d.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (18 pp, sha256
2c99c52b5e389124, retrieved 2026-10-07, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).