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TCA6408ARGTR Breakout
I/O EXPANDER I2C 8-BIT 16-VQFN
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Design a Custom BoardAbout This Component
8-bit I/O expander with I2C/SMBus interface operating at 400 kHz, designed to extend GPIO capabilities in embedded systems. Features 8 independently configurable I/O pins with programmable input/output modes, interrupt generation, and open-drain outputs. Ideal for microcontroller applications requiring additional digital I/O without dedicated pins.
Package: QFN-16 (3×3mm) · 16 pins
Why does this need a breakout?
This 3×3mm QFN with 0.5mm pitch requires a breakout board to hand-solder reliably—the fine pitch and sub-millimeter pad spacing make direct assembly impractical without professional equipment. The breakout converts the hidden pads to accessible 0.1" spaced pins, enabling breadboard prototyping of energy harvesting and battery management circuits.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | TCA6408ARGTR |
| Package | QFN-16 (3×3mm) |
| Pin Count | 16 |
| Clock Frequency | 400 kHz |
| Interface | I2C, SMBus |
| Number of I/O | 8 |
| Output Type | Push-Pull |
| Voltage - Supply | 1.65V ~ 5.5V |
What's Included
BILL OF MATERIALS
- 1x TCA6408ARGTR 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