component
TCA9554DBR
Public Made by Adomby adom
Texas Instruments I/O Expanders, SSOP-16-208mil. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownTCA9554DBR
Texas Instruments · I/O Expanders · SSOP-16-208mil
TCA9554DBR from Texas Instruments, in a SSOP-16-208mil. 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 | A0 | input | Address input; connect directly to VCC or ground to select device address; supports up to 8 devices on same I2C bus. |
| 2 | A1 | input | Address input; connect directly to VCC or ground to select device address; supports up to 8 devices on same I2C bus. |
| 3 | A2 | input | Address input; connect directly to VCC or ground to select device address; supports up to 8 devices on same I2C bus. |
| 4 | P0 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 5 | P1 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 6 | P2 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 7 | P3 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 8 | GND | power_in | Ground return connection. |
| 9 | P4 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 10 | P5 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 11 | P6 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 12 | P7 | bidirectional | I/O port with push-pull output structure; configured as input at power-on with internal 100kΩ pull-up; software configurable as input or output. |
| 13 | INT | output | Open-drain interrupt output activated when input port state differs from Input Port register; connect to VCC through pull-up resistor; active low. |
| 14 | SCL | input | I2C serial clock input; supports 100kHz standard mode and 400kHz fast mode operation; must connect to VCC through pull-up resistor. |
| 15 | SDA | bidirectional | I2C serial data bus with open-drain output; supports 100kHz standard mode and 400kHz fast mode operation; must connect to VCC through pull-up resistor. |
| 16 | VCC | power_in | Power supply input; operating range 1.65V to 5.5V; bypass capacitor 100nF recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-16-208mil |
| Category | Interface |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
TCA9554DBR - Footprint:
Package_SO:SSOP-16_5.3x6.2mm_P0.65mm - 3D model: SSOP-16-208mil (KiCad packages3D, STEP)
- 3D model files:
tca9554dbr-etched.step/tca9554dbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tca9554dbr.step/tca9554dbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (48 pp, sha256
a2ebe3b2daa63cfa, retrieved 2026-09-24, 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 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-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).