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PCA9538PWR

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Texas Instruments I/O Expanders, TSSOP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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PCA9538PWR

Texas Instruments · I/O Expanders · TSSOP-16

PCA9538PWR from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 A0 input I2C address input 0; connect to VCC or GND to set slave address.
2 A1 input I2C address input 1; connect to VCC or GND to set slave address.
3 RESET input Active-low reset input; 4 ns minimum pulse width; requires pullup resistor to VCC if unused.
4 P0 bidirectional I/O port bit 0; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
5 P1 bidirectional I/O port bit 1; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
6 P2 bidirectional I/O port bit 2; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
7 P3 bidirectional I/O port bit 3; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
8 GND power_in Ground (0 V reference).
9 P4 bidirectional I/O port bit 4; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
10 P5 bidirectional I/O port bit 5; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
11 P6 bidirectional I/O port bit 6; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
12 P7 bidirectional I/O port bit 7; configurable as high-Z input or push-pull output; 5 V tolerant; maximum sink current 25 mA per pin.
13 INT tri_state Open-drain interrupt output; asserts low when configured input port changes; requires pullup resistor to VCC.
14 SCL tri_state I2C serial clock bus; open-drain output; requires pullup resistor to VCC.
15 SDA tri_state I2C serial data bus; open-drain output; requires pullup resistor to VCC.
16 VCC power_in Supply voltage; operating range 2.3 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-16
Category Interface
Pins 16

CAD (KiCad official)

  • Symbol: PCA9538PWR
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: pca9538pwr-etched.step / pca9538pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pca9538pwr.step / pca9538pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (44 pp, sha256 7bbc8724cd47ce44, retrieved 2026-09-18, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-4-6 (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