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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-16-1EP (3×3mm, EP) · 16 pins
Why does this need a breakout?
This 3×3mm QFN-16 with 0.5mm pitch requires a breakout board to prototype effectively. The fine pitch makes hand soldering nearly impossible, and the hidden pads underneath prevent breadboard use entirely. A breakout board converts the package to through-hole or larger pads, enabling rapid iteration with wideband amplifiers, motor drivers, and power management ICs that typically use this footprint.
Component specifications
ELECTRICAL CHARACTERISTICS
| Manufacturer | Texas Instruments |
| Part Number | TCA6408ARGTR |
| Package | QFN-16-1EP (3×3mm, EP) |
| 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