LM8333 Datasheet | National Semiconductor

.. LM8333 Keypad Controller with I/O Expansion and ACCESS.bus Host Interface September 2006 LM8333 Keypad Controller with I/O Expansion and ACCESS.bus Host Interface 1.0 General Description The LM8333 is a general-purpose controller for matrixaddressed keypads which provides an ACCESS.bus (I2Cpatible) 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. It supports keypad matrices up to 8 x 8 in size (plus another 8 special-function keys), for portable applications such as cellphones, PDAs, games, and other handheld applications. Key press...