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Description

The AT28HC256 is a high-performance electrically erasable and programmable read only memory. Its 256K of memory is organized as 32,768 words by 8 bits. Manufactured with Atmel¡¯s advanced nonvolatile CMOS technology, the AT28HC256 offers access times to 70 ns with power dissipation of just 440 mW. When the AT28HC256 is deselected, the standby current is less than 5 mA.

Features

? Fast Read Access Time ¨C 70 ns

? Automatic Page Write Operation

¨C Internal Address and Data Latches for 64 Bytes

¨C Internal Control Timer

? Fast Write Cycle Times

¨C Page Write Cycle Time: 3 ms or 10 ms Maximum

¨C 1 to 64-byte Page Write Operation

? Low Power Dissipation

¨C 80 mA Active Current

¨C 3 mA Standby Current

? Hardware and Software Data Protection

? DATA Polling for End of Write Detection

? High Reliability CMOS Technology

¨C Endurance: 104 or 105 Cycles

¨C Data Retention: 10 Years

? Single 5V ¡À 10 Supply

? CMOS and TTL Compatible Inputs and Outputs

? JEDEC Approved Byte-wide Pinout

? Full Military, Commercial, and Industrial Temperature Ranges

? Green (Pb/Halide-free) Packaging Option