256K Bit I²C™CMOS Serial EEPROM

DEVICE SELECTION TABLE

†100 kHz for V_CC < 2.5V.

‡100 kHz for E temperature range.

FEATURES

• Low power CMOS technology

- Maximum write current 3 mA at 5.5V

- Maximum read current 400 µA at 5.5V

- Standby current 100 nA typical at 5.5V

• 2-wire serial interface bus, I2C compatible

• Cascadable for up to eight devices

• Self-timed ERASE/WRITE cycle

• 64-byte page-write mode available

• 5 ms max write-cycle time

• Hardware write protect for entire array

• Output slope control to eliminate ground bounce

• Schmitt trigger inputs for noise suppression

• 100,000 erase/write cycles guaranteed

• Electrostatic discharge protection > 4000V

• Data retention > 200 years

• 8-pin PDIP and SOIC (208 mil) packages

• Temperature ranges:

- Commercial (C): 0°C to +70°C

- Industrial (I): -40°C to +85°C

- Automotive (E): -40°C to +125°C

DESCRIPTION

The Microchip Technology Inc. 24AA256/24LC256/ 24FC256 (24XX256*) is a 32K x 8 (256K bit) Serial Electrically Erasable PROM, capable of operation across a broad voltage range (1.8V 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 2M bit address space. This device is available in the standard 8-pin plastic DIP and 8-pin SOIC (208 mil) packages.

PACKAGE TYPE

BLOCK DIAGRAM

Maximum Ratings*

V_CC.................................................................................................7.0V

All inputs and outputs w.r.t. V_SS ............................. -0.6V to VCC +1.0V

Storage temperature ...................................................-65°C to +150°C

Ambient temp. with power applied ..............................-65°C to +125°C

Soldering temperature of leads (10 seconds) ...........................+300°C

ESD protection on all pins...........................................................Š 4 kV

*Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

PIN FUNCTION TABLE