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24LCS52 Datasheet(PDF) 1 Page - Microchip Technology

Part No. 24LCS52
Description  2K 2.5V I 2 C Serial EEPROM with Software Write Protect
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Maker  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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© 1996 Microchip Technology Inc.
Preliminary
DS21166B-page 1
FEATURES
• Single supply with operation down to 2.5V
• Low power CMOS technology
- 1 mA active current typical
- 10
µA standby current typical at 5.5V
-5
µA standby current typical at 3.0V
• Organized as a single block of 256 bytes (256 x 8)
• Software write protection for lower 128 bytes
• Hardware write protection for entire array
• 2-wire serial interface bus, I2C
™ compatible
• 100kHz (2.5V) and 400kHz (5V) compatibility
• Self-timed write cycle (including auto-erase)
• Page-write buffer for up to 16 bytes
• 3.5 ms typical write cycle time for page-write
• 10,000,000 erase/write cycles guaranteed
• ESD protection >4,000V
• Data retention > 200 years
• 8-pin DIP, SOIC or TSSOP packages
• Available for extended temperature ranges
DESCRIPTION
The Microchip Technology Inc. 24LCS52 is a 2K bit
Electrically Erasable PROM capable of operation
across a broad voltage range (2.5V to 5.5V). This
device has a software write protect feature for the lower
half of the array, as well as an external pin that can be
used to write protect the entire array. The software write
protect feature is enabled by sending the device a spe-
cial command, and once this feature has been enabled,
it cannot be reversed. In addition to the software pro-
tect feature, there is a WP pin that can be used to write
protect the entire array, regardless of whether the soft-
ware write protect register has been written or not. This
allows the system designer to protect none, half or all of
the array, depending on the application. The device is
organized as a single block of 256 x 8-bit memory with
a 2-wire serial interface. Low voltage design permits
operation down to 2.5 volts with typical standby and
active currents of only 5
µA and 1 mA respectively. The
device has a page-write capability for up to 16 bytes of
data. The device is available in the standard 8-pin DIP,
8-pin SOIC and TSSOP packages.
- Commercial (C):
0
°C to +70°C
- Industrial (I):
-40
°C to +85°C
PACKAGE TYPES
BLOCK DIAGRAM
PDIP/SOIC
TSSOP
A0
A1
A2
Vss
Vcc
WP
SCL
SDA
1
2
3
4
8
7
6
5
Vcc
WP
SCL
SDA
A0
A1
A2
Vss
1
2
3
4
8
7
6
5
I/O
Control
Logic
Memory
Control
Logic
XDEC
HV Generator
Standard
Array
Software write
Write Protect
Circuitry
YDEC
Vcc
Vss
SENSE AMP
R/W CONTROL
SDA SCL
A0 A1 A2
WP
protected area
(00h-7Fh)
24LCS52
2K 2.5V I2CSerial EEPROM with Software Write Protect
I2C is a trademark of Philips Corporation.
This document was created with FrameMaker404




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