TCA1116RTWR

The Texas Instruments TCA1116RTWR is a versatile 16-bit I/O expander that communicates via the I2C interface. It is designed for 1.65V to 5.5V VCC operation, providing general-purpose remote I/O expansion for various microcontroller families. The device supports a fast 400 kHz I2C bus speed and features configurable I2C addresses using hardware pins, allowing up to four devices on the same bus.

Key features include an open-drain active-low interrupt output and an active-low reset input. The I/O ports are 5V tolerant, and the device offers high current push-pull outputs suitable for directly driving LEDs. It also supports partial power-down modes where SDA and SCL remain 5V tolerant even when VCC is 0V. The TCA1116RTWR is supplied in a 24-WQFN exposed pad package, designed for surface mounting.

This I/O expander includes polarity inversion registers for active-high or active-low operation and configurable I/O direction. At power-on, all I/Os are configured as inputs. The system master can enable the I/Os as either inputs or outputs by writing to the I/O configuration bits. The device exhibits low standby current consumption of 3 μA maximum and meets stringent ESD and latch-up performance standards.