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TCA6408ARGTR

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Texas Instruments I/O Expanders, QFN-16-EP(3x3). Datasheet-verified pinout, 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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TCA6408ARGTR

Texas Instruments · I/O Expanders · QFN-16-EP(3x3)

TCA6408ARGTR from Texas Instruments, in a QFN-16-EP(3x3). 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 RESET input Active-low reset input requiring pull-up to VCCI when not actively connected.
2 P0 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
3 P1 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
4 P2 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
5 P3 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
6 GND power_in Ground.
7 P4 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
8 P5 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
9 P6 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
10 P7 bidirectional P-port input/output with push-pull design structure, configured as input at power-on.
11 INT output Open-drain active-low interrupt output requiring pull-up resistor to VCCI.
12 SCL bidirectional Serial clock bus requiring pull-up resistor to VCCI.
13 SDA bidirectional Serial data bus requiring pull-up resistor to VCCI.
14 VCCP power_in Supply voltage for P-ports with operating range 1.65 V to 5.5 V.
15 VCCI power_in Supply voltage for I2C bus with operating range 1.65 V to 5.5 V enabling voltage level translation.
16 ADDR input Address input connecting directly to VCCP or ground.
17 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package QFN-16-EP(3x3)
Category Interface
Pins 17

CAD (KiCad official)

  • Symbol: TCA6408ARGTR
  • Footprint: Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm
  • 3D model: QFN-16-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: tca6408argtr-etched.step / tca6408argtr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tca6408argtr.step / tca6408argtr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (50 pp, sha256 4e444553aa8bf678, retrieved 2026-09-17, 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