Key Encoder IC
ROHM's key encoder IC can monitor up to 64 keys (8x8 matrix), making it suitable for QWERTY keyboards. Only key changes are are encoded (8bit), reducing microcontroller load significantly compared with conventional systems that store the status of all keys in the registry. Additional functions include ghost key rejection, N-key rollover, Power ON Reset function, and an oscillator.
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Detects and encodes (8bit) key changes
Only key changes are are encoded (8bit data via 3-wire interface), significantly reducing microcontroller load compared with conventional systems that store the status of all keys in the registry.
Monitors up to 64 keys (8x8 matrix)
Ghost key rejection function
Standby current <5µA
Integrated oscillator and Power ON Reset function
|Part No.||Supply Voltage (V)||Num. of GPIO port||Serial I/F||Power ON Reset||Num. of Slave Address||Output format||Package||RoHS||Distribution Inventory|
|BU1851GUW||2.20 to 3.60||-||Original||Yes||-||-||VBGA035W040||Yes|