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AT49F040T Datasheet(PDF) 1 Page - ATMEL Corporation

Part No. AT49F040T
Description  4-Megabit (512K x 8) 5-volt Only CMOS Flash Memory
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT49F040T Datasheet(HTML) 1 Page - ATMEL Corporation

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1
DIP Top View
4-Megabit
(512K x 8)
5-volt Only
CMOS
Flash Memory
AT49F040
AT49F040T
AT49F040/040T
Features
Single Voltage Operation
– 5V Read
– 5V Reprogramming
Fast Read Access Time - 70 ns
Internal Program Control and Timer
16K bytes 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 nonvola-
tile CMOS technology, the device offers access times to 70 ns with power dissipation
of just 275 mW over the commercial temperature range. When the device is dese-
lected, the CMOS standby current is less than 100
µA.
The device contains a user-enabled “boot block” protection feature. Two versions of
the feature are available: the AT49F040 locates the boot block at lowest order
addresses (“bottom boot”); the AT49F040T locates it at highest order addresses (“top
boot”).
Rev. 0998A-A–01/98
AT49F040/040T
Pin Configurations
Pin Name
Function
A0 - A18
Addresses
CE
Chip Enable
OE
Output Enable
WE
Write Enable
I/O0 - I/O7
Data Inputs/Outputs
PLCC Top View
TSOP Top View
Type 1
(continued)


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