TCA9538 Overview
The TCA9538 is a 16-pin device that provides 8 bits of general purpose parallel input and output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol. The device can operate with a power supply voltage ranging from 1.65 V to 5.5 V. The device supports both 100-kHz (Standard-mode) and 400-kHz (Fast-mode) clock frequencies.
TCA9538 Key Features
- 1 Low Standby Current Consumption
- I2C to Parallel Port Expander
- Open-Drain Active-Low Interrupt Output
- Active-Low Reset Input
- Operating Power-Supply Voltage Range of 1.65 V
- 5-V Tolerant I/O Ports
- 400-kHz Fast I2C Bus
- Two Hardware Address Pins Allow up to Four
- Input and Output Configuration Register
- Polarity Inversion Register