24AA52_LCS52| Datasheet

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24AA52/24LCS52
2K 2.2V I2CTM 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 A 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, I2CTM 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

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 A and 1 mA, respectively. The 24XXX52 also has a page write capabi
lity 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 Software write protected area (00h-7Fh) Standard Array SDA SCL VCC VSS Write-Protect Circuitry YDEC Sense Amp. R/W Control

Device Selection Table
Part Number 24AA52 24LCS52 Note 1: VCC Range 1.8-5.5 2.2-5.5 Max Clock Frequency 400 kHz(1) 400 kHz Temp Ranges I I
I/O Control Logic Memory Control Logic XDEC

100 kHz for VCC <2.2V

Package Types
PDIP/SOIC/TSSOP/MSOP/DFN
A0 A1 A2 VSS 1 2 3 4 8 7 6 5 VCC WP SCL SDA

A0 1 A1 2 A2 3 VSS 4

8 VCC 7 WP 6 SCL 5 SDA

*24XXX52 is used in this document as a generic part number for the 24AA52/24LCS52 devices.

2005 Microchip Technology Inc.

DS21166J-page 1

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24AA52_LCS52 DATASHEET