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AT49F020-70JI Datasheet

  • AT49F020-70JI

  • 2-Megabit 256K x 8 5-volt Only CMOS Flash Memory

  • 10頁(yè)

  • ATMEL   ATMEL

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Features
鈥?/div>
Single Voltage Operation
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?5V Read
鈥?5V Reprogramming
Fast Read Access Time - 55 ns
Internal Program Control and Timer
8K 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
鈥?50 mA Active Current
鈥?100
碌A(chǔ)
CMOS Standby Current
Typical 10,000 Write Cycles
Description
The AT49F020 is a 5-volt-only in-system Flash Memory. Its 2 megabits of memory is
organized as 262,144 words by 8 bits. Manufactured with Atmel鈥檚 advanced nonvola-
tile 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 dese-
lected, the CMOS standby current is less than 100
碌
A.
To allow for simple in-system reprogrammability, the AT49F020 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 AT49F020 is performed by erasing the
entire 2 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)
2-Megabit
(256K x 8)
5-volt Only
CMOS Flash
Memory
AT49F020
Pin Configurations
Pin Name
A0 - A17
CE
OE
WE
I/O0 - I/O7
NC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
PLCC Top View
A11
A9
A8
A13
A14
A17
WE
VCC
NC
A16
A15
A12
A7
A6
A5
A4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DIP Top View
NC
A16
A15
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
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
TSOP Top View
Type 1
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
A3
I/O1
I/O2
GND
I/O3
I/O4
I/O5
I/O6
14
15
16
17
18
19
20
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
5
6
7
8
9
10
11
12
13
4
3
2
1
32
31
30
A12
A15
A16
NC
VCC
WE
A17
29
28
27
26
25
24
23
22
21
A14
A13
A8
A9
A11
OE
A10
CE
I/O7
0567B-A鈥?/97
1

AT49F020-70JI相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 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
  • 英文版
    128K x 8 (1M bit), 2.7-Volt (BV)/3-Volt (LV) Read and 2.7-Vo...
  • 英文版
    1-Megabit 128K x 8 5-volt Only Flash Memory
    ATMEL
  • 英文版
    1-Megabit 128K x 8 5-volt Only Flash Memory
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  • 英文版
    2-Megabit 256K x 8 5-volt Only Flash Memory
    ATMEL
  • 英文版
    2-megabit (256K x 8) 5-volt Only Flash Memory
    ATMEL [ATM...
  • 英文版
    2-Megabit 256K x 8 5-volt Only Flash Memory
    ATMEL [ATM...
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    4-Megabit CMOS Flash Memory
    ETC
  • 英文版
    ATMEL Corporation [4-Megabit 512K x 8/ 256K x 16 CMOS Flash...
    ATMEL
  • 英文版
    8-Megabit 5-volt Only Flash Memory
    ETC
  • 英文版
    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...
    ATMEL
  • 英文版
    ATMEL Corporation [2-Megabit 256K x 8 5-volt Only CMOS Flas...
    ATMEL
  • 英文版
    4 Megabit 512K x 8 5-volt Only CMOS Flash Memory
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  • 英文版
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    ATMEL [ATM...

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