component
PCA9555DBR
Public Made by Adomby adom
Texas Instruments I/O Expanders, SSOP-24-208mil. 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
markdownPCA9555DBR
Texas Instruments · I/O Expanders · SSOP-24-208mil
PCA9555DBR 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 | Open-drain active-low interrupt output; connect to VCC through a pullup 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 | Port 0 bit 0 input/output with push-pull design structure. |
| 5 | P01 | bidirectional | Port 0 bit 1 input/output with push-pull design structure. |
| 6 | P02 | bidirectional | Port 0 bit 2 input/output with push-pull design structure. |
| 7 | P03 | bidirectional | Port 0 bit 3 input/output with push-pull design structure. |
| 8 | P04 | bidirectional | Port 0 bit 4 input/output with push-pull design structure. |
| 9 | P05 | bidirectional | Port 0 bit 5 input/output with push-pull design structure. |
| 10 | P06 | bidirectional | Port 0 bit 6 input/output with push-pull design structure. |
| 11 | P07 | bidirectional | Port 0 bit 7 input/output with push-pull design structure. |
| 12 | GND | power_in | Ground. |
| 13 | P10 | bidirectional | Port 1 bit 0 input/output with push-pull design structure. |
| 14 | P11 | bidirectional | Port 1 bit 1 input/output with push-pull design structure. |
| 15 | P12 | bidirectional | Port 1 bit 2 input/output with push-pull design structure. |
| 16 | P13 | bidirectional | Port 1 bit 3 input/output with push-pull design structure. |
| 17 | P14 | bidirectional | Port 1 bit 4 input/output with push-pull design structure. |
| 18 | P15 | bidirectional | Port 1 bit 5 input/output with push-pull design structure. |
| 19 | P16 | bidirectional | Port 1 bit 6 input/output with push-pull design structure. |
| 20 | P17 | bidirectional | Port 1 bit 7 input/output with push-pull design structure. |
| 21 | A0 | input | Address input 0; connect directly to VCC or ground. |
| 22 | SCL | input | I2C serial clock bus; connect to VCC through a pullup resistor. |
| 23 | SDA | bidirectional | I2C serial data bus; connect to VCC through a pullup resistor. |
| 24 | VCC | power_in | Supply voltage, 2.3 V to 5.5 V recommended operating range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SSOP-24-208mil |
| Category | Interface ICs |
| Pins | 24 |
CAD (KiCad official)
- Symbol:
PCA9555DBR - Footprint:
Package_SO:SSOP-24_5.3x8.2mm_P0.65mm - 3D model: SSOP-24-208mil (KiCad packages3D, STEP)
- 3D model files:
pca9555dbr-etched.step/pca9555dbr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pca9555dbr.step/pca9555dbr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (42 pp, sha256
2b12136d10071504, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-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).