25LC128-E/P Microchip Technology, 25LC128-E/P Datasheet - Page 9
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25LC128-E/P
Manufacturer Part Number
25LC128-E/P
Description
128k, 16K X 8 , 2.5V SER EE EXT 8 PDIP .300in TUBE
Manufacturer
Microchip Technology
Datasheet
1.25AA128-IP.pdf
(26 pages)
Specifications of 25LC128-E/P
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Memory Size
128K (16K x 8)
Speed
10MHz
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
2.4
The 25XX128 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:
© 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
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
0
0
4
4
25AA128/25LC128
1
5
1
5
1
6
0
6
0
7
0
7
DS21831D-page 9