25LC040A-I/SN Memory by Microchip Technology

4Kb 2.5V SPI Serial EEPROM

Status: Active
Series: 25LC040A
RoHS: Compliant
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The Microchip 25LC040A is a 4 Kb Serial EEPROM utilizing the industry standard Serial Peripheral Interface (SPI) compatible serial bus. The device is organized as one block of 512 x 8-bit and is optimized for use in consumer electronics, industrial, medical, and automotive applications where reliable and dependable nonvolatile memory storage is essential. Software write protection allows the user to protect ¼, ½, or the entire memory array. A hardware write protect pin is also provided, which additionally protects against inadvertent writes to the status register and memory array. The EEPROM is available in a variety of space-saving packaging options.

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Prices starting from US$0.45

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512 x 8-bit (4 Kbit)
Supports SPI modes 0 and 3
Up to 10 MHz clock frequency
Self-Timed Erase and Write Cycles (5 ms max.)
Read current: 5 mA (Max) at 10 MHz
Write current: 5 mA (Max) at 10 MHz
Standby current: 5 µA (Max) at 5.5 V
Block Write Protection: Protect 1/4, 1/2 or Entire Array
More than 1 million erase/write cycles
Data retention > 200 years
Industrial (I): -40°C to 85°C
Extended (E): -40°C to +125°C
Extended+ (H): -40°C to +150°C
Automotive AECQ-100 Qualified1
Factory Programming Available
Available in standard packages including 8-lead PDIP and SOIC, and advanced packages including 8-lead MSOP, 8-lead TSSOP, 8-lead 2x3 DFN, and 6-lead SOT-23


Density (Organization) 4K bits
Operating Voltage Min. (V) 2.5
Oper Voltage Max (V) 5.5
Max. Clock Freq. 10 MHz
Page Size (bytes) 16
Write Protected True
Write Protect Scheme Quarter, Half, Whole Array
Endurance 1,000,000
Data Retention (Years) 0
Bus Modes SPI
Battery Backup False
Pins | Packaging 8 | SOIC
Temp Range -40C to +85C
Packing Media Tube (100)


Application Notes
AN909 - Interfacing SPI? Serial EEPROMs to PIC16 Devices
AN966 - Interfacing SPI Serial EEPROMs to Microchip PICmicro® Microcontrollers
AN995 - Using the C18 Compiler and the MSSP to Interface SPI? EEPROMs with PIC18 Devices
AN1000 - Using the MSSP Module to Interface SPI? Serial EEPROMs with PIC18 Devices
AN1006 - Interfacing SPI(TM) Serial EEPROMs to PIC18 Devices
AN1018 - Using the C18 Compiler to Interface SPI Serial EEPROMs with PIC18 Devices
AN1019 - EEPROM Endurance Tutorial
AN1040 - Recommended Usage of Microchip SPI Serial EEPROM Devices
AN1073 - Interfacing Microchip SPI Serial EEPROMs to NXP P89LPC9XX Microcontrollers Using Hardware Peripheral
AN1069 - Using C30 Compiler and the SPI module to Interface EEPROMs with dsPIC33F and PIC24F
AN1096 - Using the C30 Compiler to Interface SPI Serial EEPROMs with dsPIC33
AN1193 - Using C to Interface 8051 MCUs with SPI Serial EEPROMs
AN1197 - Using a Hardware Module to Interface 8051 MCUs with SPI Serial EEPROMs
AN1198 - Interfacing 8051 MCUs with SPI Serial EEPROMs
AN1419 - Adding Flexibility by Using Multiple Footprints for SPI 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

4K, 512 X 8, 2.5V SER EE | Microchip Technology
25LC040A Series 4 Kbit (512 x 8) 5.5 V SMT SPI Bus Serial EEPROM - SOIC-8 | Future Electronics
IC: EEPROM memory | Transfer Multisort Elektronik
4K,512 X 8, 2.5V Serial EE SOIC-8 | RS
Serial Eeprom, 4Kbit, 10Mhz, Soic-8 | Newark Electronics
SERIAL EEPROM, 4KBIT, 10MHZ, SOIC-8 | element14
EEPROM Serial-SPI 4K-bit 512 x 8 3.3V/5V 8-Pin SOIC N | EBV Elektronik
Microchip 25LC040A-I/SN Serial EEPROM Memory,4kbit,80ns,2.5 to 5.5V 8-Pin SOIC | Microchip Technology Inc. 25LC040A-I/SN | RS Americas

Frequently Asked Questions

Where can I find additional details, specifications and documents for a 25LC040A-I/SN?

Additional datasheets, footprints and schematics for 25LC040A-I/SN are listed on our Part Details page. You can also find images and similar parts to 25LC040A-I/SN on this page.

What pricing and inventory information can I view?

Distributor pricing and stock information is available for 25LC040A-I/SN on our Product Comparison page. Access via the 'View Pricing & Stock' button to view 25LC040A-I/SN price breaks, MOQs, lead times, inventory and SKUs from distributors.

What category does 25LC040A-I/SN fall under?

The 25LC040A-I/SN is listed under Semiconductors - ICs > Memory > EEPROM.

Can I view similar or alternative parts?

You can view similar parts to 25LC040A-I/SN when available in the EEPROM range under the specifications section at the bottom of the details page.

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Submit any questions directly to the customer support team of the distributor listing the product. For the 25LC040A-I/SN you can contact the distributor directly for product support, shipping queries etc.

Is the 25LC040A-I/SN RoHS compliant?

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

Which authorised distributors for 25LC040A-I/SN have stock available?

Authorised distributors including Microchip Technology, Future Electronics, Transfer Multisort Elektronik, RS and Newark Electronics have stock available or on a lead time for 25LC040A-I/SN.

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