* Key input function for up to 30 keys.
* General-purpose output ports for up to four pins.
* A key scan is performed only when a key is pressed, and thus pow.

LC7570

LC7570E

LC75710NE

LC75711NE

LC75712E

LC75725E

LC7573

LC7573N

LC7573NM

LC75741E

LC75741W

LC75742E

LC75742W

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