24LC256-E/SN Memory by Microchip Technology

256Kb I2C compatible 2-wire Serial EEPROM

Status: Active
Series: 24LC256
RoHS: Compliant
Download Datasheet Visit Manufacturer Site View Pricing & Stock

The Microchip Technology Inc. 24LC256 is a 256Kb (32K x 8) Serial Electrically Erasable PROM (EEPROM), capable of 2.5V to 5.5V operation. 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.

Where to Buy

Prices starting from US$0.84

Distributor Stock
Logo for RS
from US$1.09
in stock
Buy Now
Logo for element14
from US$1.20
in stock
Buy Now
Logo for Newark Electronics
Newark Electronics
from US$0.84
in stock
Buy Now
Logo for Farnell
from US$1.24
in stock
Buy Now
Logo for Future Electronics
Future Electronics
from US$1.22
in stock
Buy Now
Logo for EBV Elektronik
EBV Elektronik
in stock
Buy Now
Logo for Avnet America
Avnet America
from US$1.02
Buy Now
Logo for Microchip Technology
Microchip Technology
from US$0.90
Buy Now
Logo for RS Americas
RS Americas
from US$1.06
Buy Now
Logo for Avnet Silica
Avnet Silica
Buy Now


32K x 8 (256Kbit)
Self-Timed Erase/Write Cycle
64-Byte Page Write Buffer
Page Write Time 5 ms Max.
Hardware Write-Protect Pin
Factory Programming Available
Operating voltage 2.5V to 5.5V
Read current 400 uA, max.
Standby current 1 uA, max.
Cascadable up to Eight Devices
Schmitt Trigger Inputs for Noise Suppression
Output Slope Control to Eliminate Ground Bounce
100 kHz and 400 kHz Clock Compatible
ESD Protection >4000V
Pb-Free and RoHS Compliant


Density (Organization) 256K bits (x8)
Operating Voltage Min. (V) 2.5
Oper Voltage Max (V) 5.5
Max. Clock Freq. 400 kHz
Page Size (bytes) 64
Write Protected True
Write Protect Scheme Full Array
Endurance 1,000,000
Data Retention (Years) 0
Battery Backup False
Pins | Packaging 8 | SOIC
Temp Range -40C to +125C
Packing Media Tube (100)


Application Notes
AN974 - Interfacing I2C™ Serial EEPROMs to PICmicro® Microcontrollers
AN976 - Using the MSSP Module to Interface I2C? Serial EEPROMs with PIC16 Devices
AN979 - Interfacing I2C™ Serial EEPROMs to PIC18 Devices
AN982 - Interfacing I2C Serial EEPROMs to PIC10 and PIC12 Devices
AN989 - Using the MSSP Module to Interface I2C? Serial EEPROMs with PIC18 Devices
AN991 - Using the C18 Compiler and the MSSP to Interface I2C™ EEPROMs with PIC18 Devices
AN997 - Using the C18 Compiler to Interface I2C? Serial EEPROMs with PIC18 Devices
AN1019 - EEPROM Endurance Tutorial
AN1028 - Recommended Usage of Microchip I2C? Serial EEPROM Devices
AN1079 - Using the C30 Compiler and the I2C? Peripheral to Interface Serial EEPROMs with dsPIC33F
AN1100 - Using the C30 Compiler to Interface Serial EEPROMs with dsPIC33F
AN1113 - Using C and a Hardware Module to Interface 8051 MCUs with I2C Serial EEPROMs
AN1147 - Interfacing 8051 MCUs with I2C Serial EEPROMs
AN1190 - Using ASM and a Hardware Module to Interface 8051 MCUs with I2C(TM) Serial EEPROMs
AN1195 - Using C to Interface 8051 MCUs with I2C(TM) Serial EEPROMs
AN1418 - Adding Flexibility by Using Multiple Footprints for I2C Serial EEPROMs

Environmental Information

JEDEC Indicator e3
ROHS Compliant
China EFUP Compliant
Device Weight (g) 0.078
Shipping Weight (kg) 0.25
Lead Count 8
Package Type SOIC
Package Width or Size .150In(3.90mm)
Soldering Composition Matte Tin

Alternative Descriptions

SERIAL EEPROM, 256KBIT, 400KHZ, SOIC-8 | element14
Serial Eeprom, 256Kbit, 400Khz, Soic-8 | Newark Electronics
256K 32Kx8 2.5V Ser. EEPROM,24LC256-E/SN | RS
24LC256 Series 256 Kb I2C 2 Wire (32K X 8) 2.5 V Serial EEPROM SMT - SOIC-8 | Future Electronics
EEPROM Serial-I2C 256K-bit 32K x 8 3.3V/5V 8-Pin SOIC N Tube | EBV Elektronik
256K, 32K X 8, 2.5V SER EE | Microchip Technology
256K 32Kx8 2.5V Ser. EEPROM,24LC256-E/SN | Microchip Technology Inc. 24LC256-E/SN | RS Americas

Frequently Asked Questions

Where can I find additional details, specifications and documents for a 24LC256-E/SN?

Additional datasheets, footprints and schematics for 24LC256-E/SN are listed on our Part Details page. You can also find images and similar parts to 24LC256-E/SN on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for 24LC256-E/SN on our Product Comparison page. Access via the 'View Pricing & Stock' button to view 24LC256-E/SN price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does 24LC256-E/SN fall under?

The 24LC256-E/SN is listed under Semiconductors - ICs > Memory > EEPROM.

Can I view similar or alternative parts?

You can view similar parts to 24LC256-E/SN when available in the EEPROM range under the specifications section at the bottom of the details page.

Who can I contact for technical support of the product?

Submit any questions directly to the customer support team of the distributor listing the product. For the 24LC256-E/SN you can contact the distributor directly for product support, shipping queries etc.

Is the 24LC256-E/SN RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Microchip Technology.

Which authorised distributors for 24LC256-E/SN have stock available?

Authorised distributors including element14, Newark Electronics, Farnell, RS and Future Electronics have stock available or on a lead time for 24LC256-E/SN.

How do I check stock and lead times for all distributors?

Stock availability and lead times will be displayed for 24LC256-E/SN often in real-time on the comparison pages.

What if I can't find stock of 24LC256-E/SN?

You can fill out our help required form which you can use to request a quote for 24LC256-E/SN from some of our verified obsolescence suppliers. Alternatively, contact us via our web chat in the bottom left of your screen and one of our team will try to help.

We use cookies to improve your experience. See our privacy policy.