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