TCAL9539 Description
The TCAL9539 device provides general purpose parallel input/output (I/O) expansion for the two-line bidirectional I2C bus (or SMBus) protocol and is designed for 1.08-V to 3.6-V VCC operation. The device supports 100-kHz (Standard-mode), 400kHz (Fast-mode), and 1-MHz (fast-mode-plus) I2C clock frequencies. I/O expanders such as the TCAL9539 provide a simple solution when additional I/Os are needed for switches,...
TCAL9539 Key Features
- Operating power-supply voltage range of 1.08 V to 3.6 V
- Low standby current consumption of 1 µA typical at 1.8 mV
- 1-MHz fast mode plus I2C bus
- Hardware address pin allows two devices on the
- Active-low reset input (RESET )
- Open-drain active-low interrupt output (INT )
- Input or output configuration register
- Polarity inversion register
- Configurable I/O drive strength register
- Pull-up and pull-down resistor configuration