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Description

The AT49F040B is a 5-volt-only in-system reprogrammable Flash Memory. Its 4 megabits of memory is organized as 524,288 words by 8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the device offers access times to 55 ns with power dissipation of just 110 mW over the commercial temperature range.

Features

? Single Supply for Read and Write: 4.5 to 5.5V

? Fast Read Access Time – 55 ns

? Internal Program Control and Timer

? Flexible Sector Architecture

– One 16K Bytes Boot Sector with Programming Lockout

– Two 8K Bytes Parameter Sectors

– Eight Main Memory Sectors (One 32K Bytes, Seven 64K Bytes)

? Fast Erase Cycle Time – 8 Seconds

? Byte-by-Byte Programming – 12 μs/Byte Typical

? Hardware Data Protection

? DATA Polling or Toggle Bit for End of Program Detection

? Low Power Dissipation

– 20 mA Active Current

– 25 μA CMOS Standby Current

? Minimum 100,000 Write Cycles