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TCA9535RTWR Breakout
I2C EXPANDER 16-BIT 400KHZ 24WQFN
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Design a Custom BoardAbout This Component
16-bit I2C-compatible GPIO expander with dual 8-bit ports supporting open-drain outputs. Operates at up to 400 kHz clock frequency and is compatible with SMBus protocols. Ideal for applications requiring additional digital I/O expansion in microcontroller systems with limited GPIO pins.
Package: QFN-24 (4×4mm) · 24 pins
Why does this need a breakout?
This 0.5mm pitch QFN is nearly impossible to hand solder and entirely incompatible with breadboards due to hidden pads beneath the package. A breakout board provides accessible headers and pre-soldered connections, letting you prototype with InvenSense motion sensors via I2C or SPI without specialized SMD equipment or rework skills.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | TCA9535RTWR |
| Package | QFN-24 (4×4mm) |
| Pin Count | 24 |
| Clock Frequency | 400 kHz |
| Interface | I2C, SMBus |
| Number of I/O | 16 |
| Output Type | Push-Pull |
| Voltage - Supply | 1.65V ~ 5.5V |
What's Included
BILL OF MATERIALS
- 1x TCA9535RTWR 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