component
PCA9557PWR
Public Made by Adomby adom
Texas Instruments I/O Expanders, TSSOP-16. Datasheet-verified pinout, 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
markdownPCA9557PWR
Texas Instruments · I/O Expanders · TSSOP-16
PCA9557PWR from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | SCL | input | Serial clock bus. Connect to VCC through a pullup resistor. |
| 2 | SDA | bidirectional | Serial data bus. Connect to VCC through a pullup resistor. |
| 3 | A0 | input | Address input. Connect directly to VCC or ground. |
| 4 | A1 | input | Address input. Connect directly to VCC or ground. |
| 5 | A2 | input | Address input. Connect directly to VCC or ground. |
| 6 | P0 | bidirectional | P-port input/output with high impedance open-drain design structure. Connect to VCC through a pullup resistor. |
| 7 | P1 | bidirectional | P-port input/output with push-pull design structure. |
| 8 | GND | power_in | Ground. |
| 9 | P2 | bidirectional | P-port input/output with push-pull design structure. |
| 10 | P3 | bidirectional | P-port input/output with push-pull design structure. |
| 11 | P4 | bidirectional | P-port input/output with push-pull design structure. |
| 12 | P5 | bidirectional | P-port input/output with push-pull design structure. |
| 13 | P6 | bidirectional | P-port input/output with push-pull design structure. |
| 14 | P7 | bidirectional | P-port input/output with push-pull design structure. |
| 15 | RESET | input | Active-low reset input. Connect to VCC through a pullup resistor if no active connection is used. |
| 16 | VCC | power_in | Supply voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Interface |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
PCA9557PWR - Footprint:
Package_SO:TSSOP-16_4.4x5mm_P0.65mm - 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files:
pca9557pwr-etched.step/pca9557pwr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pca9557pwr.step/pca9557pwr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (47 pp, sha256
1f41dbe8f20f14a2, retrieved 2026-09-23, tier: manufacturer) - 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).