24AA52_05 Datasheet, PDF (1/28 Pages) Microchip Technology – 2K 2.2V I2C™ Serial EEPROM with Software Write-Protect

24AA52/24LCS52
2K 2.2V I²C^™ Serial EEPROM with Software Write-Protect
Features:
• Single supply with operation down to 1.8V
• Low-power CMOS technology:
- 1 mA active current, typical
- 1 μA standby current, typical (I-temp)
• Organized as 1 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
• Schmitt Trigger inputs for noise suppression
• Output slope control to eliminate ground bounce
• 100 kHz (24AA52) and 400 kHz (24LCS52)
compatibility
• Self-timed write cycle (including auto-erase)
• Page write buffer for up to 16 bytes
• ESD protection > 4,000V
• 1,000,000 erase/write cycles
• Data retention > 200 years
• 8-lead PDIP, SOIC, TSSOP, MSOP and DFN
packages
• Pb-free finishes available
• Available for extended temperature ranges:
- Industrial (I): -40°C to +85°C
Device Selection Table
Part
Number
VCC
Range
Max Clock
Frequency
24AA52
1.8-5.5
400 kHz⁽¹⁾
24LCS52
2.2-5.5
400 kHz
Note 1: 100 kHz for VCC <2.2V
Temp
Ranges
I
I
Package Types
PDIP/SOIC/TSSOP/MSOP/DFN
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
A0 1
A1 2
A2 3
VSS 4
8 VCC
7 WP
6 SCL
5 SDA
Description:
The Microchip Technology Inc. 24AA52/24LCS52
(24XXX52*) is a 2 Kbit Electrically Erasable PROM
capable of operation across a broad voltage range
(1.8V 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 special command. Once this
feature has been enabled, it cannot be reversed. In
addition to the software protect feature, there is a WP
pin that can be used to write-protect the entire array,
regardless of whether the software 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 one block of 256 x 8-bit memory with a 2-wire serial
interface. Low-voltage design permits operation down
to 1.8V, with standby and active currents of only 1 μA
and 1 mA, respectively. The 24XXX52 also has a page
write capability for up to 16 bytes of data. The 24XXX52
is available in the standard 8-pin PDIP, surface mount
SOIC, TSSOP, MSOP and DFN packages.
Block Diagram
A0 A1 A2
WP
HV Generator
I/O
Control
Logic
Memory
Control
Logic
XDEC
SDA SCL
VCC
VSS
Software write
protected area
(00h-7Fh)
Standard
Array
Write-Protect
Circuitry
YDEC
Sense Amp.
R/W Control
*24XXX52 is used in this document as a generic part number
for the 24AA52/24LCS52 devices.
© 2005 Microchip Technology Inc.
DS21166J-page 1