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PCF8574APWR Breakout
I2C I/O EXPANDER 8-BIT 100KHZ 20TSSOP
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Design a Custom BoardAbout This Component
8-bit remote I/O expander for I2C bus applications supporting 2.5V to 6V operation. Features quasi-bidirectional ports (P0-P7) with latched outputs capable of directly driving LEDs, open-drain interrupt output, and low 10µA standby current. Ideal for GPIO-limited microcontrollers requiring parallel port expansion via serial I2C interface.
Package: TSSOP-20 (4.4×6.5mm) · 20 pins
Why does this need a breakout?
Hand-soldering 0.65mm pitch leads is tedious and error-prone; a breakout board with standard 0.1" headers lets you prototype I/O expanders and logic gates on breadboards without a reflow oven. The compact SSOP package also becomes DIP-friendly, eliminating jumper spaghetti and reducing assembly mistakes during development cycles.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | PCF8574APWR |
| Package | TSSOP-20 (4.4×6.5mm) |
| Pin Count | 20 |
| Clock Frequency | 100 kHz |
| Interface | I2C |
| Number of I/O | 8 |
| Output Type | Push-Pull |
| Voltage - Supply | 2.5V ~ 6V |
What's Included
BILL OF MATERIALS
- 1x PCF8574APWR soldered onto breakout PCB
- Pin headers pre-soldered (2.54mm / 0.1" pitch)
- All IC pins broken out to 2.54mm headers
Breakout Board Design
PCB SPECIFICATIONS