TCAL9539 Datasheet (Texas Instruments)

TCAL9539, SMBus I/O Expander

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 freq

TCAL9539 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 same I2C, SMBus bus

* Active-low reset input (RESET )