component
PCA9555RGER
Public Made by Adomby adom
Texas Instruments I/O Expanders, VQFN-24-EP(4x4). 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
markdownPCA9555RGER
Texas Instruments · I/O Expanders · VQFN-24-EP(4x4)
PCA9555RGER from Texas Instruments, in a VQFN-24-EP(4x4). 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 | P00 | bidirectional | P-port 0 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 2 | P01 | bidirectional | P-port 1 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 3 | P02 | bidirectional | P-port 2 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 4 | P03 | bidirectional | P-port 3 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 5 | P04 | bidirectional | P-port 4 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 6 | P05 | bidirectional | P-port 5 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 7 | P06 | bidirectional | P-port 6 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 8 | P07 | bidirectional | P-port 7 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 9 | GND | power_in | Ground, 0V reference. |
| 10 | P10 | bidirectional | P-port 10 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 11 | P11 | bidirectional | P-port 11 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 12 | P12 | bidirectional | P-port 12 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 13 | P13 | bidirectional | P-port 13 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 14 | P14 | bidirectional | P-port 14 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 15 | P15 | bidirectional | P-port 15 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 16 | P16 | bidirectional | P-port 16 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 17 | P17 | bidirectional | P-port 17 input/output, configurable as input (0 to 5.5V) or push-pull output (25mA sink, 10mA source capability). |
| 18 | A0 | input | I2C slave address input, connect directly to VCC or ground per Table 8-2 to program device address, must not change during I2C communication. |
| 19 | SCL | bidirectional | I2C serial clock line, open-drain output with 3mA sink capability at VOL=0.4V, requires external pullup resistor to VCC, supports 0 to 400kHz operation. |
| 20 | SDA | bidirectional | I2C serial data line, open-drain output with 3mA sink capability at VOL=0.4V, requires external pullup resistor to VCC, supports 0 to 400kHz operation. |
| 21 | VCC | power_in | Supply voltage input, 2.3V to 5.5V nominal operating range, typical quiescent current 100 to 200µA at 5.5V with no load. |
| 22 | INT | output | Active-low open-drain interrupt output, asserts when input port state differs from Input Port register value, 3mA sink capability at VOL=0.4V, requires external pullup resistor to VCC. |
| 23 | A1 | input | I2C slave address input, connect directly to VCC or ground per Table 8-2 to program device address, must not change during I2C communication. |
| 24 | A2 | input | I2C slave address input, connect directly to VCC or ground per Table 8-2 to program device address, must not change during I2C communication. |
| 25 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VQFN-24-EP(4x4) |
| Category | Interface |
| Pins | 25 |
CAD (KiCad official)
- Symbol:
PCA9555RGER - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm - 3D model: VQFN-24-EP(4x4) (KiCad packages3D, STEP)
- 3D model files:
pca9555rger-etched.step/pca9555rger-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);pca9555rger.step/pca9555rger.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 2026-09-23, 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).