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TCA6408AQPWRQ1

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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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TCA6408AQPWRQ1

Texas Instruments · I/O Expanders · TSSOP-16

TCA6408AQPWRQ1 from Texas Instruments, in a TSSOP-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 VCCI power_in Supply voltage for I2C bus; operating voltage range 1.65V to 3.6V; provides voltage level translation.
2 ADDR input Address input; connect directly to VCCP or ground for device selection.
3 RESET input Active-low reset input; VIH = 0.7×VCCI to 3.6V, VIL = -0.5 to 0.3×VCCI; connect to VCCI through pull-up resistor if not actively controlled.
4 P0 bidirectional P-port 0 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
5 P1 bidirectional P-port 1 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
6 P2 bidirectional P-port 2 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
7 P3 bidirectional P-port 3 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
8 GND power_in Ground; return path for supply currents.
9 P4 bidirectional P-port 4 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
10 P5 bidirectional P-port 5 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
11 P6 bidirectional P-port 6 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
12 P7 bidirectional P-port 7 push-pull input-output; configurable as input or output, defaults to input at power-on; output voltage VO = 0 to VCCP.
13 INT output Open-drain active-low interrupt output; maximum continuous output current IOL = 25mA for VO = 0 to VCCI; connect to VCCI through pull-up resistor.
14 SCL input Serial clock bus input for I2C/SMBus interface; VIH = 0.7×VCCI to VCCI, VIL = -0.5 to 0.3×VCCI; connect to VCCI through pull-up resistor.
15 SDA bidirectional Serial data bus input-output for I2C/SMBus interface; VIH = 0.7×VCCI to VCCI, VIL = -0.5 to 0.3×VCCI; maximum output current IOL = 25mA; connect to VCCI through pull-up resistor.
16 VCCP power_in Supply voltage for P-ports; operating voltage range 1.65V to 3.6V; maximum continuous current ICC = 160mA.

Key specifications

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

CAD (KiCad official)

  • Symbol: TCA6408AQPWRQ1
  • Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
  • 3D model: TSSOP-16 (KiCad packages3D, STEP)
  • 3D model files: tca6408aqpwrq1-etched.step / tca6408aqpwrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tca6408aqpwrq1.step / tca6408aqpwrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (41 pp, sha256 edb72d360821dab7, retrieved 2026-10-01, 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