LM8333 Datasheet - National Semiconductor

LM8333 Keypad Controller

The LM8333 is a general-purpose controller for matrixaddressed keypads which provides an ACCESS.bus (I2Ccompatible) interface to a host microcontroller. It offloads the burden of keyboard scanning from the host, while providing extremely low power consumption in both operational and standby modes. I.

LM8333 Features

* n 8 x 8 standard keys n 8 special function keys (SF keys) providing a total of 72 keys for the maximum keyboard matrix n ACCESS.bus (I2C-compatible) communication interface to the host n Four general purpose host programmable I/O pins with two optional (slow) external Interrupts n 16 byte FIFO buffe

LM8333_NationalSemiconductor.pdf