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SUMMARY DESCRIPTION

The M29W022B is a 2 Mbit (256Kb x8) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single low voltage (2.7 to 3.6V) supply. On power-up the memory defaults to its Read mode where it can be read in the same way as a ROM or EPROM.

■ SINGLE 2.7 to 3.6V SUPPLY VOLTAGE for

PROGRAM, ERASE and READ OPERATIONS

■ ACCESS TIME: 55ns

■ PROGRAMMING TIME

– 10μs by Byte typical

■ 7 MEMORY BLOCKS

– 1 Boot Block (Top or Bottom Location)

– 2 Parameter and 4 Main Blocks

■ PROGRAM/ERASE CONTROLLER

– Embedded Byte Program algorithm

– Embedded Multi-Block/Chip Erase algorithm

– Status Register Polling and Toggle Bits

■ ERASE SUSPEND and RESUME MODES

– Read and Program another Block during

Erase Suspend

■ UNLOCK BYPASS PROGRAM COMMAND

– Faster Production/Batch Programming

■ LOW POWER CONSUMPTION

– Standby and Automatic Standby

■ 100,000 PROGRAM/ERASE CYCLES per

BLOCK

■ 20 YEARS DATA RETENTION

– Defectivity below 1 ppm/year

■ ELECTRONIC SIGNATURE

– Manufacturer Code: 20h

– Top Device Code M29W022BT: C4h

– Bottom Device Code M29W022BB: C3h