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AT49F040 Datasheet

  • AT49F040

  • 4 Megabit 512K x 8 5-volt Only CMOS Flash Memory

  • 10頁

  • ATMEL   ATMEL

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AT49F040
Features
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Single Voltage Operation
- 5V Read
- 5V Reprogramming
Fast Read Access Time - 90 ns
Internal Program Control and Timer
16K bytes Boot Block With Lockout
Fast Erase Cycle Time - 10 seconds
Byte By Byte Programming - 50
碌s/Byte
Hardware Data Protection
DATA Polling For End Of Program Detection
Low Power Dissipation
- 50 mA Active Current
- 100
碌A
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鈥檚 advanced nonvola-
tile CMOS technology, the device offers access times to 90 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
碌A.
To allow for simple in-system reprogrammability, the AT49F040 does not require high
input voltages for programming. Five-volt-only commands determine the read and
programming operation of the device. Reading data out of the device is similar to
reading from an EPROM. Reprogramming the AT49F040 is performed by erasing
the entire 4 megabits of memory and then programming on a byte by byte basis. The
byte programming time is a fast 50
碌s.
The end of a program cycle can be optionally
detected by the DATA polling feature. Once the end of a byte program cycle has been
detected, a new access for a read or program can begin. The typical number of pro-
gram and erase cycles is in excess of 10,000 cycles.
(continued)
DIP Top View
4 Megabit
(512K x 8)
5-volt Only
CMOS Flash
Memory
Preliminary
AT49F040
Pin Configurations
Pin Name
A0 - A18
CE
OE
WE
Function
Addresses
Chip Enable
Output Enable
Write Enable
I/O0 - I/O7 Data Inputs/Outputs
PLCC Top View
TSOP Top View
Type 1
0359C
4-209

AT49F040相關型號PDF文件下載

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  • 英文版
    PROTECTIVE GUARD KB SER SQ&RND
  • 英文版
    COVER DUST POLY FOR KB SERIES
  • 英文版
    CENTER BARRIER BLACK POLY LB SER
  • 英文版
    PROTECTIVE GUARD FOR LB SER SQ
  • 英文版
    Round Pushbutton Switch Cap Black Slip On
  • 英文版
    Round Pushbutton Switch Cap Red Slip On
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    2-megabit (256K x 8) 5-volt Only Flash Memory
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  • 英文版
    8-Megabit 5-volt Only Flash Memory
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    8-Megabit 1M x 8 5-volt Only Flash Memory
    ATMEL
  • 英文版
    ATMEL Corporation [1-Megabit 128K x 8 5-volt Only CMOS Flas...
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  • 英文版
    4 Megabit 512K x 8 5-volt Only CMOS Flash Memory
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    ATMEL [ATM...

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