25LC320A-I/ST Microchip Technology, 25LC320A-I/ST Datasheet - Page 11

• Manufacturer Part Number: 25LC320A-I/ST
• Description: IC EEPROM 32KBIT 10MHZ 8TSSOP
• Manufacturer: Microchip Technology

Specifications of 25LC320A-I/ST

• Memory Size: 32K (4K x 8)
• Package / Case: 8-TSSOP
• 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
• Organization: 4 K x 8
• Interface Type: SPI
• Maximum Clock Frequency: 10 MHz
• Access Time: 50 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.5 V
• Maximum Operating Current: 5 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.3 V, 5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

3.4
The 25LCXXX 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 com-
pleted 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
0
0
4
4
1
5
1
5
1
6
1 0
6
0
7
0
7
25LCXXX
DS22131C-page 11