25LC040A-I/P Microchip Technology, 25LC040A-I/P Datasheet - Page 11
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25LC040A-I/P
Manufacturer Part Number
25LC040A-I/P
Description
IC EEPROM 4KBIT 10MHZ 8DIP
Manufacturer
Microchip Technology
Specifications of 25LC040A-I/P
Memory Size
4K (512 x 8)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
10MHz
Interface
SPI, 3-Wire Serial
Voltage - Supply
2.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DIP (0.300", 7.62mm)
Memory Configuration
512 X 8 / 256 X 16
Ic Interface Type
SPI
Clock Frequency
10MHz
Supply Voltage Range
2.5V To 5.5V
Memory Case Style
DIP
No. Of Pins
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
25LC040A-I/P
Manufacturer:
MICROCHIP
Quantity:
12 000
3.4
The 25LCXXXA contains a write enable latch.
Table 5-1 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 3-4:
FIGURE 3-5:
© 2009 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
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
1 0
6
0
7
0
7
25LCXXXA
DS22136B-page 11