25C320-I/SN Microchip Technology, 25C320-I/SN Datasheet - Page 12
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25C320-I/SN
Manufacturer Part Number
25C320-I/SN
Description
IC EEPROM 32KBIT 3MHZ 8SOIC
Manufacturer
Microchip Technology
Datasheet
1.25AA320-ISN.pdf
(26 pages)
Specifications of 25C320-I/SN
Memory Size
32K (4K x 8)
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Speed
3MHz
Interface
SPI, 3-Wire Serial
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (3.9mm Width)
Memory Configuration
4K X 8
Ic Interface Type
SPI
Clock Frequency
3MHz
Supply Voltage Range
4.5V To 5.5V
Memory Case Style
SOIC
No. Of Pins
8
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
25C320-I/SN
Manufacturer:
MCP
Quantity:
2 496
Company:
Part Number:
25C320-I/SN
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
25C320-I/SN
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
25AA320/25LC320/25C320
3.7
The following protection has been implemented to
prevent inadvertent writes to the array:
• The write enable latch is reset on power-up
• A WRITE ENABLE instruction must be issued to
• After a byte write, page write or STATUS register
• CS must be set high after the proper number of
• Access to the array during an internal write cycle
TABLE 3-3:
DS21227F-page 12
set the write enable latch
write, the write enable latch is reset
clock cycles to start an internal write cycle
is ignored and programming is continued
WPEN
x
0
1
x
Data Protection
WRITE-PROTECT FUNCTIONALITY MATRIX
High
Low
WP
x
x
WEL
0
1
1
1
Protected Blocks
Protected
Protected
Protected
Protected
3.8
The 25XX320 powers on in the following state:
• The device is in low-power Standby mode
• The write enable latch is reset
• SO is in high-impedance state
• A low level on CS is required to enter active state
.
(CS =
1
Unprotected Blocks
Power-On State
)
Protected
Writable
Writable
Writable
© 2008 Microchip Technology Inc.
STATUS Register
Protected
Protected
Writable
Writable