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PCA9555DWR Breakout
IC I/O EXPANDER I2C 16-BIT 24-SOIC
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£7.27
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Design a Custom BoardAbout This Component
16-bit I/O expander with I2C/SMBus interface operating at up to 400kHz. Features two 8-bit ports with independent input/output configuration, internal pull-ups, and interrupt outputs. Commonly used to add GPIO capability to microcontroller designs with limited I/O pins, ideal for industrial control and embedded applications.
Package: SOIC-24W (7.5mm wide) · 24 pins
Why does this need a breakout?
SOIC-24W's 1.27mm pitch and compact 7.5×15.4mm footprint make hand soldering difficult and breadboard integration impossible. A breakout board breaks out all 24 pins to standard headers, enabling rapid prototyping of microcontrollers, I/O expanders, and LED drivers without reflow equipment or custom PCB layout.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | PCA9555DWR |
| Package | SOIC-24W (7.5mm wide) |
| Pin Count | 24 |
| Clock Frequency | 400 kHz |
| Interface | I2C, SMBus |
| Number of I/O | 16 |
| Output Type | Push-Pull |
| Voltage - Supply | 2.3V ~ 5.5V |
What's Included
BILL OF MATERIALS
- 1x PCA9555DWR 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