The SN7326 is a 64 key, key-scan controller. It offloads the burden of keyboard scanning from the host processor. The SN7326 supports keypad matrix of up to 8×8. Key press and release events are encoded into a byte format and loaded into a key event register for retrieval by the host processor.
The SN7326 integrates a debounce function which rejects false or transient key switch activities. The interrupt output (INT) is used to signify if there are any keypad activities.
To minimize power, the SN7326 automatically enters a low power standby mode when there is no keypad, I/O, or host activity.
The SN7326 is available in a Pb-free 4mm × 4mm QFN-24 package.
l 2.4V to 5.5V operation
l 400kHz I2C serial interface
l Available for multi-key press detect
l Low 0.3μA (typ.) standby current
l Operate in -40°C to +125°C
l Pb-free 4mm × 4mm QFN-24 package
l Keypad of QWERTY type phones
l PDAs, games, and other handheld applications