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TCA9544APWR

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Texas Instruments Signal Switches, Multiplexers, Decoders, TSSOP-20. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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TCA9544APWR

Texas Instruments · Signal Switches, Multiplexers, Decoders · TSSOP-20

TCA9544APWR from Texas Instruments, in a TSSOP-20. 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 Address input 0. Connect directly to VCC or ground.
2 A1 input Address input 1. Connect directly to VCC or ground.
3 A2 input Address input 2. Connect directly to VCC or ground.
4 INT0 input Active-low interrupt input 0. Connect to VDPU0 through a pull-up resistor.
5 SD0 bidirectional Serial data 0. Connect to VDPU0 through a pull-up resistor.
6 SC0 bidirectional Serial clock 0. Connect to VDPU0 through a pull-up resistor.
7 INT1 input Active-low interrupt input 1. Connect to VDPU1 through a pull-up resistor.
8 SD1 bidirectional Serial data 1. Connect to VDPU1 through a pull-up resistor.
9 SC1 bidirectional Serial clock 1. Connect to VDPU1 through a pull-up resistor.
10 GND power_in Ground.
11 INT2 input Active-low interrupt input 2. Connect to VDPU2 through a pull-up resistor.
12 SD2 bidirectional Serial data 2. Connect to VDPU2 through a pull-up resistor.
13 SC2 bidirectional Serial clock 2. Connect to VDPU2 through a pull-up resistor.
14 INT3 input Active-low interrupt input 3. Connect to VDPU3 through a pull-up resistor.
15 SD3 bidirectional Serial data 3. Connect to VDPU3 through a pull-up resistor.
16 SC3 bidirectional Serial clock 3. Connect to VDPU3 through a pull-up resistor.
17 INT output Active-low interrupt output. Connect to VDPUM through a pull-up resistor.
18 SCL bidirectional Serial clock line. Connect to VDPUM through a pull-up resistor.
19 SDA bidirectional Serial data line. Connect to VDPUM through a pull-up resistor.
20 VCC power_in Supply power, operating voltage range 1.65 V to 5.5 V.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Logic
Pins 20

CAD (KiCad official)

  • Symbol: TCA9544APWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: tca9544apwr-etched.step / tca9544apwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tca9544apwr.step / tca9544apwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (29 pp, sha256 6ffaa5ad36a784f7, retrieved 2026-09-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-haiku-4-5-20251001 (text), consensus claude-sonnet-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