Boardoza TCA6408A 8-Bit I²C I/O Expander Breakout Board
The TCA6408A is a 16-pin device that provides 8- bits of general purpose parallel input/output (I/O)
expansion for the two-line bidirectional I2C bus (or SMBus) protocol. This device can operate with a
power supply voltage ranging from 1.65 V to 5.5 V on both the I2C bus side (VCCI) and on the P-port side (VCCP). This allows the TCA6408A to interface with next-generation microprocessors and microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to the dropping power supplies of microprocessors and microcontrollers, some PCB components such as LEDs remain at a 5-V power supply. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies. I/O expanders such as the TCA6408A provide a simple solution when additional I/Os are needed for switches, sensors, push-buttons, LEDs, fans, and so forth.
Key Features
- I2C to Parallel port expander
- Operating power-supply voltage range of 1.65 V to 5.5 V
- Allows bidirectional voltage-level translation and gpio expansion between 1.8-V, 2.5-V, 3.3-V, and 5-V I2C bus and P-ports
- Low standby current consumption of 1 μA
- 5-V Tolerant I/O ports
- 400-kHz Fast I2C bus
- Hardware address pin allows two TCA6408A devices on the same I2C/SMBus bus
- Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- 2 Applications
- Servers
- Routers (telecom switching equipment)
- Personal computers
- Personal electronics (gaming consoles)
- Industrial automation
- Products with GPIO-limited processors
Technical Specifications
- Item
- B-TCA6408A-IO Expander-BRK
- Supply voltage for P-ports .
- 1.65 V to 5.5 V
- Supply voltage for I2C pins .
- 1.8-V, 2.5-V, 3.3-V, and 5-V I2C bus and P-ports. (1.65 V to 5.5 V)
- Functions
- I/O Expander
- Operating Temperature
- -40/+85°C
- Board Dimensions
- 20x40mm
Support
For technical questions, documentation and issue reports, use the GitHub repository or write to us directly.