TCA8418E Overview
The TCA8418E 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 TCA8418E saves power and bandwidths since it handles the keypad scanning algorithms.
TCA8418E Key Features
- 1 Operating Power-Supply Voltage Range of 1.65-V to 3.6-V
- ±15-kV Human Body Model High Voltage ESD (GPIO lines)
- 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