component
PCA9555DWR
Public Made by Adomby adom
Texas Instruments I/O Expanders, SOIC-24-300mil. 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
markdownPCA9555DWR
Texas Instruments · I/O Expanders · SOIC-24-300mil
PCA9555DWR from Texas Instruments, in a SOIC-24-300mil. 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; connect to VCC through pullup resistor. |
| 2 | A1 | input | Address input 1; connect to VCC or ground. |
| 3 | A2 | input | Address input 2; connect to VCC or ground. |
| 4 | P00 | bidirectional | Port P00 input/output with push-pull structure. |
| 5 | P01 | bidirectional | Port P01 input/output with push-pull structure. |
| 6 | P02 | bidirectional | Port P02 input/output with push-pull structure. |
| 7 | P03 | bidirectional | Port P03 input/output with push-pull structure. |
| 8 | P04 | bidirectional | Port P04 input/output with push-pull structure. |
| 9 | P05 | bidirectional | Port P05 input/output with push-pull structure. |
| 10 | P06 | bidirectional | Port P06 input/output with push-pull structure. |
| 11 | P07 | bidirectional | Port P07 input/output with push-pull structure. |
| 12 | GND | power_in | Ground; negative supply rail. |
| 13 | P10 | bidirectional | Port P10 input/output with push-pull structure. |
| 14 | P11 | bidirectional | Port P11 input/output with push-pull structure. |
| 15 | P12 | bidirectional | Port P12 input/output with push-pull structure. |
| 16 | P13 | bidirectional | Port P13 input/output with push-pull structure. |
| 17 | P14 | bidirectional | Port P14 input/output with push-pull structure. |
| 18 | P15 | bidirectional | Port P15 input/output with push-pull structure. |
| 19 | P16 | bidirectional | Port P16 input/output with push-pull structure. |
| 20 | P17 | bidirectional | Port P17 input/output with push-pull structure. |
| 21 | A0 | input | Address input 0; connect to VCC or ground. |
| 22 | SCL | bidirectional | Serial clock bus; connect to VCC through pullup resistor. |
| 23 | SDA | bidirectional | Serial data bus; connect to VCC through pullup resistor. |
| 24 | VCC | power_in | Supply voltage; 2.3V to 5.5V operating range. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-24-300mil |
| Category | Interface |
| Pins | 24 |
CAD (KiCad official)
- Symbol:
PCA9555DWR - Footprint:
Package_SO:SOIC-24W_7.5x15.4mm_P1.27mm - 3D model: SOIC-24-300mil (KiCad packages3D, STEP)
- 3D model files:
pca9555dwr-etched.step/pca9555dwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pca9555dwr.step/pca9555dwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (49 pp, sha256
f82351ef5c7f9c9c, retrieved 2026-10-05, 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, primaryclaude-haiku-4-5-20251001(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).