25AA256-I/SM Microchip Technology, 25AA256-I/SM Datasheet - Page 12

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25AA256-I/SM

Manufacturer Part Number
25AA256-I/SM
Description
IC EEPROM 256KBIT 10MHZ 8SOIC
Manufacturer
Microchip Technology
Datasheet

Specifications of 25AA256-I/SM

Memory Size
256K (32K 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-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Memory Configuration
32K X 8
Ic Interface Type
Serial, SPI
Clock Frequency
10MHz
Access Time
50ns
Supply Voltage Range
1.8V To 5.5V
Memory Case Style
SOIC
No. Of Pins
8
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
25AA256-I/SM
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
25AA256/25LC256
2.7
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 set
• 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 2-1:
DS21822F-page 12
x = don’t care
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
(SR bit 1)
WEL
0
1
1
1
Data Protection
WRITE-PROTECT FUNCTIONALITY MATRIX
(SR bit 7)
WPEN
x
0
1
1
1 (high)
WP pin
0 (low)
x
x
Protected Blocks
Protected
Protected
Protected
Protected
2.8
The 25XX256 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 high-to-low-level transition on CS is required to
(CS = 1)
enter active state
Unprotected Blocks
Power-On State
Protected
Writable
Writable
Writable
© 2007 Microchip Technology Inc.
STATUS Register
Protected
Protected
Writable
Writable

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