24AA256_24LC256_24FC256| Datasheet

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24AA256/24LC256/24FC256
256K I2CTM CMOS Serial EEPROM
Device Selection Table
Part Number 24AA256 24LC256 24FC256 Note 1: 2: VCC Range 1.7-5.5V 2.5-5.5V 1.7-5.5V Max. Clock Frequency 400 kHz(1) 400 kHz 1 MHz(2) Temp. Ranges I I, E I Temperature Ranges: - Industrial (I): - Automotive (E): -40 C to +85 C -40 C to +125 C

Description:
The Microchip Technology Inc. 24AA256/24LC256/ 24FC256 (24XX256*) is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM, capable of operation across a broad voltage range (1.7V to 5.5V). It has been developed for advanced, low-power applications such as personal communications or data acquisition. This device also has a page write capability of up to 64 bytes of data. This device is capable of both random and sequential reads up to the 256K boundary. Functional address lines allow up to eight devices on the same bus, for up to 2 Mbit address space. This device is available in the standard 8-pin plastic DIP, SOIC, TSSOP, MSOP and DFN packages.

100 kHz for VCC < 2.5V. 400 kHz for VCC < 2.5V.

Features:
Single Supply with Operation Down to 1.7V for 24AA256 and 24FC256 Devices, 2.5V for 24LC256 Devices Low-Power CMOS Technology: - Active current 400 uA, typical - Standby current 100 nA, typical 2-Wire Serial Interface, I2CTM Compatible Cascadable up to Eight Devices Schmitt Trigger Inputs for Noise Suppression Output Slope Control to Eliminate Ground Bounce 100 kHz and 400 kHz Clock Compatibility Page Write Time 5 ms max. Self-Timed Erase/Write Cycle 64-Byte Page Write Buffer Hardware Write-Protect ESD Protection >4000V More than 1 Million Erase/Write Cycles Data Retention >200 years Factory Programming Available Packages Include 8-lead PDIP, SOIC, DFN, TSSOP and MSOP Pb-Free and RoHS Compliant

Block Diagram
A0 A1A2 WP HV Generator

I/O Control Logic

Memory Control Logic

XDEC

EEPROM Array Page Latches

I/O

SCL YDEC

SDA VCC VSS Sense Amp. R/W Control

Package Types
PDIP/SOIC A0 A1 A2 VSS 1 24XX256 2 3 4 8 7 6 5 VCC WP SCL SDA A0 A1 A2 VSS TSSOP/MSOP* 1 24XX256 2 3 4 8 7 6 5 VCC WP SCL SDA A0 A1 A2 VSS 1 24XX256 2 3 4 DFN 8 VCC 7 WP 6 SCL 5 SDA

Note: * Pins A0 and A1 are no connects for the MSOP package only.

*24XX256 is used in this document as a generic part number for the 24AA256/24LC256/24FC256 devices.

2007 Microchip Technology Inc.

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