25AA020A-I/P Microchip Technology, 25AA020A-I/P Datasheet - Page 9
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25AA020A-I/P
Manufacturer Part Number
25AA020A-I/P
Description
IC EEPROM 2KBIT 10MHZ 8DIP
Manufacturer
Microchip Technology
Specifications of 25AA020A-I/P
Memory Size
2K (256 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-DIP (0.300", 7.62mm)
Clock Frequency
10MHz
Supply Voltage Range
1.8V To 5.5V
Memory Case Style
DIP
No. Of Pins
8
Operating Temperature Range
-40°C To +85°C
Svhc
No SVHC (15-Dec-2010)
Package /
RoHS Compliant
Memory Configuration
256 X 8
Interface Type
Serial, SPI
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
2.4
The 25XX020A contains a write enable latch.
Table 2-4 for the Write-Protect Functionality Matrix.
This latch must be set before any write operation will be
completed internally. The WREN instruction will set the
latch, and the WRDI will reset the latch.
FIGURE 2-4:
FIGURE 2-5:
© 2006 Microchip Technology Inc.
Write Enable (WREN) and Write
Disable (WRDI)
WRITE ENABLE SEQUENCE (WREN)
WRITE DISABLE SEQUENCE (WRDI)
SCK
CS
SO
SCK
SI
CS
SO
SI
0
0
0
0
0
1
0
1
See
Preliminary
high-impedance
0
high-impedance
0
2
2
0
0
3
3
25AA020A/25LC020A
The following is a list of conditions under which the
write enable latch will be reset:
• Power-up
• WRDI instruction successfully executed
• WRSR instruction successfully executed
• WRITE instruction successfully executed
• WP pin is brought low
0
0
4
4
1
5
1
5
1
6
0
6
0
7
0
7
DS21833C-page 9