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SN74F257DR
Public Made by Adomby adom
Texas Instruments Signal Switches, Multiplexers, Decoders, 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
markdownSN74F257DR
Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16
SN74F257DR 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 | A/B | input | Multiplexer select input; when low selects A inputs, when high selects B inputs. |
| 2 | 1A | input | Channel 1 data input A of 2-to-1 multiplexer. |
| 3 | 1B | input | Channel 1 data input B of 2-to-1 multiplexer. |
| 4 | 1Y | tri_state | Channel 1 3-state output; high-impedance when OE is high, driven when OE is low. |
| 5 | 2A | input | Channel 2 data input A of 2-to-1 multiplexer. |
| 6 | 2B | input | Channel 2 data input B of 2-to-1 multiplexer. |
| 7 | 2Y | tri_state | Channel 2 3-state output; high-impedance when OE is high, driven when OE is low. |
| 8 | GND | power_in | Ground reference voltage. |
| 9 | 3Y | tri_state | Channel 3 3-state output; high-impedance when OE is high, driven when OE is low. |
| 10 | 3B | input | Channel 3 data input B of 2-to-1 multiplexer. |
| 11 | 3A | input | Channel 3 data input A of 2-to-1 multiplexer. |
| 12 | 4Y | tri_state | Channel 4 3-state output; high-impedance when OE is high, driven when OE is low. |
| 13 | 4B | input | Channel 4 data input B of 2-to-1 multiplexer. |
| 14 | 4A | input | Channel 4 data input A of 2-to-1 multiplexer. |
| 15 | OE | input | Output Enable input (active low); outputs are high-impedance when OE is high. |
| 16 | VCC | power_in | Positive supply voltage; rated 4.5 V to 5.5 V per recommended operating conditions. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Logic |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
SN74F257DR - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
sn74f257dr-etched.step/sn74f257dr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);sn74f257dr.step/sn74f257dr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (15 pp, sha256
35ca05635a769cd5, retrieved 2026-10-06, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).