ADA5545 · AdafruitActive
Adafruit product #5545 — built on PCF8574. Interfaces: I2C.
| Part number | ADA5545 |
|---|---|
| Manufacturer | Adafruit |
| Category | Interface & Expansion › RTC & Timing |
| Pins | 16 |
Adafruit PCF8574 I2C GPIO Expander Breakout pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | VCC | power | |
| 2 | P7 | bidirectional | |
| 3 | P6 | bidirectional | |
| 4 | P5 | bidirectional | |
| 5 | P4 | bidirectional | |
| 6 | P3 | bidirectional | |
| 7 | P2 | bidirectional | |
| 8 | P1 | bidirectional | |
| 9 | P0 | bidirectional | |
| 10 | GND | ground | |
| 11 | VCC | power | |
| 12 | GND | ground | |
| 13 | SCL | bidirectional | |
| 14 | SDA | bidirectional | |
| 15 | INT | bidirectional | |
| 16 | A0 | bidirectional |
Schematic symbol and footprint
Footprint: Adafruit PCF8574 (header pads) — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
Where to buy
Stock and prices from the suppliers, checked 2026-10-08; excluding tax and shipping.
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