GPIO Expander 25-Pin DSBGA T/R

The TCA6418E is a 18 channel GPIO expansion device with integrated ESD protection. It can operate from 1.65 V to 3.6 V and has 18 general purpose inputs/outputs (GPIO) that can be used via the I2C interface [serial clock (SCL), serial data (SDA)].The major benefit of this device is it frees up the processor from having to individually monitor changes in multiple inputs and also frees up the GPIOs on the processor to drive other outputs.. This provides power and bandwidth savings. The TCA6418E is also ideal for usage with processors that have limited GPIOs.

Operating Power-Supply Voltage Range of 1.65 V to 3.6 V

18 GPIOs Configurable as Inputs or Outputs

ESD Protection Exceeds JESD 22 on Non-GPIO Pins

• 2000-V Human Body Model (A114-A)
• 1000-V Charged Device Model (C101)

Low Standby (Idle) Current Consumption: 3 µA

Supports 1-MHz Fast Mode Plus I²C Bus

Open-Drain Active-Low Interrupt Output, Asserted When Key is Pressed
or Key is Released

Selectable Debounce Time of 50 µs

Schmitt-Trigger Action Allows Slow Input Transition and
Better Switching Noise Immunity at the SCL and SDA Inputs:
Typical V_hys at 1.8 V is 0.18 V

Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II

Very Small Package

• WCSP (YFP): 2 mm × 2 mm; 0.4 mm pitch