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EEPROM Serial-SPI 64K-bit 8K x 8 2.5V/3.3V/5V Automotive 8-Pin SOIC N T/R

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25AA640AT-E/SN General Description

The Microchip 25AA640A is a 64 Kb Serial EEPROM utilizing theindustry standard Serial Peripheral Interface (SPI) compatible serial bus. Thedevice is organized as one block of 8192 x 8-bit and is optimized for use in consumer electronics, industrial, medical,and automotive applications where reliable and dependable nonvolatile memorystorage 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.The EEPROM is available in a variety of space-saving packaging options.

Microchip Technology, Inc Inventory

Key Features

  • 8192 x 8-bit (64 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: 1 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
  • 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 and 8-lead 2x3 TDFN
Microchip Technology, Inc Original Stock


Category Integrated Circuits (ICs)MemoryMemory Mfr Microchip Technology
Series - Package Tape & Reel (TR)
Product Status Active Memory Type Non-Volatile
Memory Format EEPROM Technology EEPROM
Memory Size 64Kbit Memory Organization 8K x 8
Memory Interface SPI Clock Frequency 10 MHz
Write Cycle Time - Word, Page 5ms Voltage - Supply 1.8V ~ 5.5V
Operating Temperature -40°C ~ 125°C (TA) Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width) Supplier Device Package 8-SOIC
Base Product Number 25AA640


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

  • DHL

  • Fedex

  • UPS

  • EMS

  • Registered Air Mail


We accept TT prepayment (bank transfer), paypal, credit cards, Western Union, Money Gram.

Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
customs fees, etc.

  • Wire Transfer

  • Paypal

  • Credit Card

  • Western Union

  • Money Gram


Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


  • Tape and Reel

    Tape and Reel

  • Cut Tape

    Cut Tape

  • Tube or Tray

    Tube or Tray


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Buying Guide

  • What is the lifespan of 25AA640AT-E/SN?

    The lifespan of 25AA640AT-E/SN depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of 25AA640AT-E/SN?

    You can find it with PDF Datasheet for 25AA640AT-E/SN on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of 25AA640AT-E/SN?

    Avaq has separate quality services with common quality inspection equipment for testing items, you can also fill out a sample form, our team will get in touch with you within 24 HOURS.

  • Can I purchase samples for testing?

    Avaq offers free samples for customers to test. This can often help you determine whether the chip or component meets your needs.

  • Where can I check the delivery after the order is completed?

    Once the order is completed, you will receive an order confirmation email containing a tracking number from AVAQ, then you can track the delivery by yourself.

  • Where to view my order of 25AA640AT-E/SN or my history order record?

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