24LC256-I/SM Integrated Circuit Chip I2C⑩ Serial EEPROM Family Data Sheet

Product Specification

I ²C™ Serial EEPROM Family Data Sheet

Features:

• 128-bit through 512 Kbit devices

• Single supply with operation down to 1.7V for 24AAXX devices

• Low-power CMOS technology:

  - 1 mA active current, typical

  - 1 μA standby current, typical (I-temp)

• 2-wire serial interface bus, I2C™ compatible

• Schmitt Trigger inputs for noise suppression

• Output slope control to eliminate ground bounce

• 100 kHz (1.7V) and 400 kHz (≥ 2.5V) compatibility

• 1 MHz for 24FCXX products

• Self-timed write cycle (including auto-erase)

• Page write buffer

• Hardware write-protect available on most devices

• Factory programming (QTP) available

• ESD protection > 4,000V

• 1 million erase/write cycles

• Data retention > 200 years

• 8-lead PDIP, SOIC, TSSOP and MSOP packages

• 5-lead SOT-23 package (most 1-16 Kbit devices)

• 8-lead 2x3mm and 5x6mm DFN packages available

• Pb-free and RoHS compliant

• Available for extended temperature ranges:

  - Industrial (I): -40°C to +85°C

  - Automotive (E): -40°C to +125°C

Description:

The Microchip Technology Inc. 24CXX, 24LCXX, 24AAXX and 24FCXX (24XX*) devices are a family of 128-bit through 512 Kbit Electrically Erased PROMs. The devices are organized in blocks of x8-bit memory with 2-wire serial interfaces. Low-voltage design permits operation down to 1.7V (for 24AAXX devices), with standby and active currents of only 1 μA and 1 mA, respectively. Devices 1 Kbit and larger have page write capability.

Parts having functional address lines allow connection of up to 8 devices on the same bus. The 24XX family is available in the standard 8-pin PDIP, surface mount SOIC, TSSOP and MSOP packages. Most 128-bit through 16 Kbit devices are also available in the 5-lead SOT-23 package. DFN packages (2x3mm or 5x6mm) are also available. All packages are Pb-free (Matte Tin) finish.

*24XX is used in this document as a generic part number for 24 series devices in this data sheet. 24XX64, for example, represents all voltages of the 64 Kbit device.

Absolute Maximum Ratings (†)

V_CC.......................................................................................................................................6.5V

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

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

Ambient temperature with power applied.............................................................-40°C to +125°C

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

† NOTICE: Stresses above those listed under “Absolute 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.

FUNCTIONAL DESCRIPTION

Each 24XX device supports a bidirectional, 2-wire bus and data transmission protocol. A device that sends data onto the bus is defined as a transmitter, while a device receiving data is defined as a receiver. The bus has to be controlled by a master device which generates the Serial Clock (SCL), controls the bus access and generates the Start and Stop conditions, while the 24XX works as slave. Both master and slave can operate as transmitter or receiver, but the master device determines which mode is activated.

Block Diagram

Package Types(1)