25AA256-I/SM Microchip Technology, 25AA256-I/SM Datasheet - Page 8

• Manufacturer Part Number: 25AA256-I/SM
• Description: IC EEPROM 256KBIT 10MHZ 8SOIC
• Manufacturer: Microchip Technology

Specifications of 25AA256-I/SM

• Memory Size: 256K (32K x 8)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 10MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Memory Configuration: 32K X 8
• Ic Interface Type: Serial, SPI
• Clock Frequency: 10MHz
• Access Time: 50ns
• Supply Voltage Range: 1.8V To 5.5V
• Memory Case Style: SOIC
• No. Of Pins: 8
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25AA256/25LC256
FIGURE 2-2:
FIGURE 2-3:
DS21822F-page 8
SCK
CS
SO
SCK
SCK
SI
CS
CS
SI
SI
0
0
0
0
0
1
32
7
1
0
0
BYTE WRITE SEQUENCE
Instruction
PAGE WRITE SEQUENCE
2
33
0
6
Instruction
2
0
3
5
34 35 36 37 38 39
3
0
Data Byte 2
0
4
0
4
4
0
5
3
5
0
High-Impedance
1
6
1
2
6
0
7
0
1
7
15 14 13 12
8
15 14 13 12
0
8
9 10 11
40
7
9 10 11
16-bit Address
41 42 43
16-bit Address
6
Data Byte 3
5
4
44 45
3
21 22 23 24 25 26 27 28 29 30 31
2
21 22 23 24 25 26 27 28 29 30 31
2
2
1
46 47
1
1
0 7
0
0
7
6
6
7
5
Data Byte n (64 max)
Data Byte
5
6
Data Byte 1
© 2007 Microchip Technology Inc.
4
4
5
3
3
4
2
2
3
1
1
2
0
0
1
Twc
0