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SN74HC253DR

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Texas Instruments Signal Switches, Multiplexers, Decoders, SOIC-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Symbol & Footprint

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Datasheet

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Contents

README

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SN74HC253DR

Texas Instruments · Signal Switches, Multiplexers, Decoders · SOIC-16

SN74HC253DR 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 1OE input Active-low output enable for section 1; the 1Y output is high-impedance when 1OE is high.
2 B input Select input B, common to both sections; unused inputs must be held at VCC or GND.
3 1C3 input Data input 3 of section 1, selected when B and A are both high.
4 1C2 input Data input 2 of section 1, selected when B is high and A is low.
5 1C1 input Data input 1 of section 1, selected when B is low and A is high.
6 1C0 input Data input 0 of section 1, selected when B and A are both low.
7 1Y tri_state 3-state data output of section 1, drives up to ±6 mA at 5 V and is high-impedance when 1OE is high.
8 GND power_in Ground.
9 2Y tri_state 3-state data output of section 2, drives up to ±6 mA at 5 V and is high-impedance when 2OE is high.
10 2C0 input Data input 0 of section 2, selected when B and A are both low.
11 2C1 input Data input 1 of section 2, selected when B is low and A is high.
12 2C2 input Data input 2 of section 2, selected when B is high and A is low.
13 2C3 input Data input 3 of section 2, selected when B and A are both high.
14 A input Select input A, common to both sections; unused inputs must be held at VCC or GND.
15 2OE input Active-low output enable for section 2; the 2Y output is high-impedance when 2OE is high.
16 VCC power_in Supply voltage, 2 V to 6 V recommended, with a 0.1-µF bypass capacitor recommended close to the pin.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-16
Category Logic
Pins 16

CAD (KiCad official)

  • Symbol: SN74HC253DR
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SOIC-16 (KiCad packages3D, STEP)
  • 3D model files: sn74hc253dr-etched.step / sn74hc253dr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); sn74hc253dr.step / sn74hc253dr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (28 pp, sha256 7fae279128d34d1d, retrieved 2026-10-01, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF