25LC640-E/P Microchip Technology, 25LC640-E/P Datasheet - Page 8

• Manufacturer Part Number: 25LC640-E/P
• Description: IC EEPROM 64KBIT 2MHZ 8DIP
• Manufacturer: Microchip Technology

Specifications of 25LC640-E/P

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 64K (8K x 8)
• Speed: 2MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 25LC640E/P

25AA640/25LC640
FIGURE 3-1:
FIGURE 3-2:
FIGURE 3-3:
DS21223H-page 8
CS
SO
SCK
SCK
SCK
CS
CS
SI
SO
SI
SI
CS
SI
0
0
0
0
0
0
7
0
32
1
0
1
Instruction
0
0
6
Instruction
33
2
0
Instruction
2
READ SEQUENCE
BYTE WRITE SEQUENCE
PAGE WRITE SEQUENCE
0
Data Byte 2
5
0
3
34 35 36 37 38 39
0
3
0
0
4
4
0
4
0
3
0
5
High-Impedance
0
5
1
2
1
6
High-Impedance
1
6
0
0
1
7
15 14 13 12
1
15 14 13 12
7
0
8
15 14 13 12
8
7
40
9 10 11
9 10 11
16-bit Address
16-bit Address
6
41 42 43
16-bit Address
Data Byte 3
5
4
3
44 45
2
21 22 23 24 25 26 27 28 29 30 31
2
2
2
21 22 23 24 25 26 27 28 29 30 31
1
1
1
46 47
1
0 7
0
0 7
0
6
6
7
7
5
Data Byte n (32 max)
5
6
6
Data Byte 1
Data Byte
© 2008 Microchip Technology Inc.
4
4
5
5
Data Out
3
3
4
4
2
2
3
3
1
1
2
2
0
0
1
1
Twc
0
0