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GENERAL DESCRIPTION

The WS57C256F is a High Performance 256K UV Erasable Electrically Programmable Read Only Memory. It is manufactured using an advanced CMOS process technology enabling it to operate at speeds as fast as 55 ns Access Time.

Two major features of the WS57C256F are its Low Power and High Speed. While operating in a TTL environment it consumes less than 120 mA while cycling at full speed. Additionally, the WS57C256F can be placed in a standby mode which drops operating current below 5 mA in a TTL environment and 500 ?A in a CMOS environment.

The WS57C256F also has exceptional output drive capability. It can source 4 mA and sink 16 mA per output.

The WS57C256F is configured in the standard EPROM pinout which provides an easy upgrade path for systems which are currently using standard EPROMs.

KEY FEATURES

? Fast Access Time

— 55 ns

? Low Power Consumption

? DESC SMD No. 5962-86063

? EPI Processing

— Latch-up Immunity Up to 200 mA

? Standard EPROM Pinout