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1FEATURES

? 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

Vhys 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

APPLICATIONS

? Smart Phones

? PDAs

? GPS Devices

? MP3 Players

? Digital Cameras

DESCRIPTION/ORDERING INFORMATION

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.