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General Description

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

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