TCA8418 Description
The TCA8418 is a keypad scan 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 to support up to 80 keys via the I2C interface. The key controller debounces inputs and maintains a 10 byte FIFO of key-press and release events which can store up to 10 keys with overflow wrap capability.
TCA8418 Key Features
- 1 Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
- Supports 80 Buttons With Use of 18 GPIOs
- Supports QWERTY Keypad Operation Plus GPIO
- Low Standby (Idle) Current Consumption: 3 μA
- Supports 1-MHz Fast Mode Plus I2C Bus
- 10 Byte FIFO to Store 10 Key Presses and
- Open-Drain Active-Low Interrupt Output
- Integrated Debounce Time of 50 μs
- Schmitt-Trigger Action Allows Slow Input
- Latch-Up Performance Exceeds 200 mA Per JESD 78, Class II