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PCA9539DW

Public Made by Adom

by adom

Texas Instruments I/O Expanders, SOIC-24-300mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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PCA9539DW

Texas Instruments · I/O Expanders · SOIC-24-300mil

PCA9539DW from Texas Instruments, in a SOIC-24-300mil. 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 INT output Open-drain active-low interrupt output that must be connected to VCC through a pullup resistor.
2 A1 input Address input that must be connected directly to VCC or ground.
3 RESET input Active-low reset input; connect to VCC through a pullup resistor if no active connection is used, and keep its voltage at or below VCC.
4 P00 bidirectional Port 0 bit 0 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
5 P01 bidirectional Port 0 bit 1 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
6 P02 bidirectional Port 0 bit 2 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
7 P03 bidirectional Port 0 bit 3 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
8 P04 bidirectional Port 0 bit 4 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
9 P05 bidirectional Port 0 bit 5 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
10 P06 bidirectional Port 0 bit 6 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
11 P07 bidirectional Port 0 bit 7 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
12 GND power_in Ground.
13 P10 bidirectional Port 1 bit 0 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
14 P11 bidirectional Port 1 bit 1 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
15 P12 bidirectional Port 1 bit 2 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
16 P13 bidirectional Port 1 bit 3 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
17 P14 bidirectional Port 1 bit 4 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
18 P15 bidirectional Port 1 bit 5 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
19 P16 bidirectional Port 1 bit 6 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
20 P17 bidirectional Port 1 bit 7 input/output with push-pull design structure; inputs tolerate up to 5.5 V.
21 A0 input Address input that must be connected directly to VCC or ground.
22 SCL input I2C serial clock bus input that must be connected to VCC through a pullup resistor.
23 SDA bidirectional I2C serial data bus that must be connected to VCC through a pullup resistor.
24 VCC power_in Supply voltage, 2.3 V to 5.5 V operating range.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-24-300mil
Category Interface
Pins 24

CAD (KiCad official)

  • Symbol: PCA9539DW
  • Footprint: Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm
  • 3D model: SOIC-24-300mil (KiCad packages3D, STEP)
  • 3D model files: pca9539dw-etched.step / pca9539dw-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pca9539dw.step / pca9539dw.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (48 pp, sha256 efe5c16c360b8432, retrieved 2026-10-03, 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, primary claude-haiku-4-5-20251001 (text), consensus claude-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).

Datasheet PDF