Texas Instruments TCA8418E Keypad Scan IC
Texas Instruments TCA8418E Keypad Scan IC features integrated ESD protection and can operate from 1.65V to 3.6V. The TI TCA8418E keypad IC has 18 general-purpose inputs / outputs (GPIO) that can be used to support up to 80 keys via the I²C interface. The TCA8418E key controller includes an oscillator that debounces at 50µs and maintains a 10-byte FIFO of key-press and release events that can store up to 10 keys with overflow wrap capability. This TI keypad IC is ideal for use in a variety of applications, including smart phones, PDAs, GPS devices, MP3 players, and digital cameras.
Features
- Operating power-supply voltage range of 1.65V to 3.6V
- ±15kV Human body model high voltage ESD (GPIO lines)
- Supports 80 buttons with use of 18 GPIOs
- Supports QWERTY keypad operation plus GPIO expansion
- 3µA Low standby (idle) current consumption
- Supports 1MHz fast mode plus I2C bus
- 10-Byte FIFO to store 10 key presses and releases
- Open-drain active-low interrupt output
- Integrated debounce time of 50µs
- Schmitt-trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs - typical vhys at 1.8V is 0.18V
- Latch-up performance exceeds 200mA Per JESD 78, class II
- Very small package WCSP (YFP): 2mm × 2mm; 0.4mm pitch
Applications
- Smart phones
- Tablets
- HMI panels
- GPS devices
- MP3 Players
- Digital cameras
Veröffentlichungsdatum: 2010-12-01
| Aktualisiert: 2022-03-11