NEC Diamand Scan 71, Service Manual

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3. 2-wire serial CMOS EEROPM
Features
Ÿ
Low Voltage and Standard Voltage Operation
5.1 (Vcc = 4.5 V to 5.5 V)
3.0 (Vcc = 2.7 V to 5.5 V)
2.5 (Vcc = 2.5 V to 5.5 V)
2.0 (Vcc = 1.8 V to 5.5 V)
Ÿ
Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K), 1024 x 8 (8K) or 2048 x 8 (16K)
Ÿ
Two-wire Serial Interface
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Bldirectional Data Transfer Protocol
Ÿ
Wire Protect Pin for Hardware Data Protection
Ÿ
Eight-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes
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Partial Page Write Cycle (10 ms max)
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High Reliability
Endurance: 100,00 Cycles
Extended Endurance Devices Available
Data Retention: 100 years
Ÿ
Automotive Grade and Extended Temperature Device Available
Ÿ
Eight-Pin and 14-Pin JEDEC SOIC and Eight-Pin PDIP Packages
Description
The AT24C01A/02/04/08/16 provides 1024/2048/4096/8192/16384 bits of serial electrically erasable and
programmable read only memory (EEPROM) organized as 128/256/512/1024/2048 words of 8 bits each.
The device is optimized for use in many industrial and commercial applications where low power and low
voltage operation are essential. The AT24C01A/02/04/08/16 is available in space saving eight-pin PDIP,
eight-pin and fourteen-pin SOIC packages and is accessed via a two-wire serial interface. The AT24C01A/
02/04/08/16 is guaranteed for 100,000 erase/wire cycles and 100 year data retention. In addition, the entire
family is available in 5.0 V (4.5 V to 5.5 V), 3.0 V (2.7 V to 5.5 V), 2.5 V (2.5 V to 5.5 V) and 2.0 V (1.8 V to
5.5 V) versions.
Pin Configurations
Pin Name Function
A
0
to A
2
Address Inputs
SDA Serial Data
SCL Serial Clock Input
WP Write Protect
NC No Connect
1
2
3
4
5
6
7
8
Vcc
WP
SCL
SDA
A0
A1
A2
GND
8-PIN PDIP
1
2
3
4
Vcc
WP
SCL
SDA
A0
A1
A2
GND
8-PIN PDIP
5
6
7
8
14-PIN PDIP
NC
Vcc
WP
NC
14
13
12
11
1
2
3
4
NC
A0
A1
NC
5
6
7
A2
GND
NC
SCL
SDA
NC
10
9
8
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