Features

• 8192 x 8 Bit organization

• Single +5 Volt Supply

• Access Time - 200/300/450 ns (max.)

• Totally static operation

• Completely TT L compatible

• 24 Pin JEDEC approved pinout

• UM2364A - Automatic power down (CE)

• UM2364 - non power down version

- programmable chip select (CS)

• Three state outputs for wire-OR expansion

• EPROMs accepted as program data input

• 2564 EPROM compatible

General Description

The UM2364 and UM2364A high performance Read Only

Memories are organ ized 8192 words by 8 b its with access

times from 200 ns to 450 ns. The ROMs are designed to

be compatible with all microprocessor and similar applications where high performance, large bit storage and simple

interfacing are important design considerations. Both

ROMs conform to the JEDEC approved pinout for 24 pin

64K ROMs.

The UM2364 offers the simplest operation (no power

down.) Its programmable chip select allows two 64K

ROMs to be OR-tied without external decoding

The UM2364A offers an automatic power down feature.

Power down is controlled by the Chip Enable (CE) input.

When CE goes high, the device will automatically power

down and remain in a low power standby mode as long as

CE remains high. This unique feature provides system level

power savings as much as 90%.

Both the UM2364 and UM2364A are pin compatible with

the 2564 EPROM thus eliminating the need to redesign

printed circuit boards for volume mask programmed ROMs

after prototyping with EPROMs.