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AT28C64B Datasheet

  • AT28C64B

  • 64K (8K x 8 CMOS

  • Atmel   Atmel

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Features
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Fast Read Access Time 鈥?150 ns
鈥?/div>
Automatic Page Write Operation
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
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鈥?Internal Address and Data Latches for 64 Bytes
Fast Write Cycle Times
鈥?Page Write Cycle Time: 10 ms Maximum
鈥?1 to 64-byte Page Write Operation
Low Power Dissipation
鈥?40 mA Active Current
鈥?100 碌A(chǔ) CMOS Standby Current
Hardware and Software Data Protection
DATA Polling and Toggle Bit for End of Write Detection
High Reliability CMOS Technology
鈥?Endurance: 100,000 Cycles
鈥?Data Retention: 10 Years
Single 5V
鹵
10% Supply
CMOS and TTL Compatible Inputs and Outputs
JEDEC Approved Byte-wide Pinout
Commercial and Industrial Temperature Ranges
Description
The AT28C64B is a high-performance electrically-erasable and programmable read
only memory (EEPROM). Its 64K of memory is organized as 8,192 words by 8 bits.
Manufactured with Atmel鈥檚 advanced nonvolatile CMOS technology, the device offers
access times to 150 ns with power dissipation of just 220 mW. When the device is
deselected, the CMOS standby current is less than 100 碌A(chǔ).
(continued)
64K (8K x 8)
Parallel
EEPROM with
Page Write and
Software Data
Protection
AT28C64B
Pin Configurations
Pin Name
A0 - A12
CE
OE
WE
I/O0 - I/O7
NC
DC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Data Inputs/Outputs
No Connect
Don鈥檛 Connect
PLCC
Top View
A7
A12
NC
DC
VCC
WE
NC
PDIP, SOIC
Top View
NC
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
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
WE
NC
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
TSOP
Top View
OE
A11
A9
A8
NC
WE
VCC
NC
A12
A7
A6
A5
A4
A3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
I/O1
I/O2
GND
DC
I/O3
I/O4
I/O5
14
15
16
17
18
19
20
A6
A5
A4
A3
A2
A1
A0
NC
I/O0
5
6
7
8
9
10
11
12
13
4
3
2
1
32
31
30
29
28
27
26
25
24
23
22
21
A8
A9
A11
NC
OE
A10
CE
I/O7
I/O6
Rev. 0270H鈥?2/99
Note:
PLCC package pins 1 and 17 are
DON鈥橳 CONNECT.
1

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