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AT49F040-12TI
Features • Single-voltage Operation • • • • • • • • • – 5V Read – 5V Reprogramming Fast Read Access Time – 55 ns Internal Program Control and Timer 16-Kbyte Boot Block with Lockout Fast Erase Cycle Time – 10 seconds Byte-by-byte Programming – 50 µs/Byte Hardware Data Protection DATA Polling for End of Program Detection Low Power Dissipation – 50 mA Active Current – 100 µA CMOS Standby Current Typical 10,000 Write Cycles Description The AT49F040 is a 5-volt-only in-system 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 275 mW over the commercial temperature range. When the device is deselected, the CMOS standby current is less than 100 µA. The device contains a user-enabled “boot block” protection feature. The AT49F040 locates the boot block at lowest order addresses (“bottom boot”). (continued) Pin Configurations Function A0 - A18 Addresses CE Chip Enable OE Output Enable WE Write Enable I/O0 - I/O7 Data Inputs/Outputs A18 A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 I/O1 I/O2 GND TSOP Top View Type 1 Not Recommended for New Design Contact Atmel to discuss the latest design in trends and options 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 VCC WE A17 A14 A13 A8 A9 A11 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 A7 A6 A5 A4 A3 A2 A1 A0 I/O0 4 3 2 1 32 31 30 OE A10 CE I/O7 I/O6 I/O5 I/O4 I/O3 GND I/O2 I/O1 I/O0 A0 A1 A2 A3 5 6 7 8 9 10 11 12 13 29 28 27 26 25 24 23 22 21 14 15 16 17 18 19 20 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 A12 A15 A16 A18 VCC WE A17 PLCC Top View A14 A13 A8 A9 A11 OE A10 CE I/O7 I/O1 I/O2 GND I/O3 I/O4 I/O5 I/O6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 AT49F040 DIP Top View Pin Name A11 A9 A8 A13 A14 A17 WE VCC A18 A16 A15 A12 A7 A6 A5 A4 4-megabit (512K x 8) 5-volt Only Flash Memory Rev. 0998D–03/01 1
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