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TCA9555DBT

Public Made by Adom

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Texas Instruments I/O Expanders, SSOP-24-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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TCA9555DBT

Texas Instruments · I/O Expanders · SSOP-24-208mil

TCA9555DBT from Texas Instruments, in a SSOP-24-208mil. 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 Interrupt output with open-drain structure; connect to VCC through pull-up resistor
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 P00 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
5 P01 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
6 P02 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
7 P03 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
8 P04 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
9 P05 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
10 P06 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
11 P07 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
12 GND power_in Ground
13 P10 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
14 P11 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
15 P12 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
16 P13 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
17 P14 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
18 P15 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
19 P16 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
20 P17 bidirectional P-port I/O with push-pull design structure; configured as input at power-on
21 A0 input Address input 0; connect directly to VCC or ground
22 SCL input Serial clock bus for I2C/SMBus interface; connect to VCC through pull-up resistor
23 SDA input Serial data bus for I2C/SMBus interface; connect to VCC through pull-up resistor
24 VCC power_in Supply voltage, recommended operating range 1.65V to 5.5V

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-24-208mil
Category Communication Interface Chip/UART/485/232
Pins 24

CAD (KiCad official)

  • Symbol: TCA9555DBT
  • Footprint: Package_SO:SSOP-24_5.3x8.2mm_P0.65mm
  • 3D model: SSOP-24-208mil (KiCad packages3D, STEP)
  • 3D model files: tca9555dbt-etched.step / tca9555dbt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); tca9555dbt.step / tca9555dbt.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (49 pp, sha256 7e8b64bcef672c03, retrieved 2026-10-06, 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