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SN74HC251DBR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, SSOP-16-208mil. 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
markdownSN74HC251DBR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SSOP-16-208mil
SN74HC251DBR from Texas Instruments, in a SSOP-16-208mil. 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 | D3 | input | Data input 3 of the eight selectable data sources. |
| 2 | D2 | input | Data input 2 of the eight selectable data sources. |
| 3 | D1 | input | Data input 1 of the eight selectable data sources. |
| 4 | D0 | input | Data input 0 of the eight selectable data sources. |
| 5 | Y | tri_state | True 3-state data output that follows the selected D input and is high-impedance when OE is high. |
| 6 | W | tri_state | Complementary 3-state data output that is the inverse of the selected D input and is high-impedance when OE is high. |
| 7 | OE | input | Active-low output enable; outputs Y and W are disabled (high-impedance) when OE is high. |
| 8 | GND | power_in | Ground. |
| 9 | C | input | Select input C, the most significant bit of the binary data-select code. |
| 10 | B | input | Select input B of the binary data-select code. |
| 11 | A | input | Select input A, the least significant bit of the binary data-select code. |
| 12 | D7 | input | Data input 7 of the eight selectable data sources. |
| 13 | D6 | input | Data input 6 of the eight selectable data sources. |
| 14 | D5 | input | Data input 5 of the eight selectable data sources. |
| 15 | D4 | input | Data input 4 of the eight selectable data sources. |
| 16 | VCC | power_in | Supply voltage, 2 V to 6 V recommended, with a 0.1-µF bypass capacitor recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-16-208mil |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74HC251DBR - Footprint:
Package_SO:SSOP-16_5.3x6.2mm_P0.65mm - 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
- 3D model files:
sn74hc251dbr-etched.step/sn74hc251dbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74hc251dbr.step/sn74hc251dbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (32 pp, sha256
75fe51c493f87a12, retrieved 2026-10-01, 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 0.3, 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).