Products > Integrated Circuits (ICs) > Memory > SST25WF040B-40I/SN
  • SST25WF040B-40I/SN

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Flash Memory, Serial, Serial NOR, 4 Mbit, 512K x 8bit, SPI, SOIC, 8 Pins

  • Package/Case :
  • SOIC-8
  • Product Categories :
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 40


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SST25WF040B-40I/SN Product Details

The SST25WF040B-40I/SN is a 4MB Serial Flash Memory features a 4-wire, SPI-compatible interface that allows for which occupies less board space. SPI serial flash memory is manufactured with proprietary, high-performance CMOS SuperFlash technology. The split-gate cell design and thick-oxide tunneling injector attain better reliability and manufacturability compared with alternate approaches. This serial flash significantly improves performance and reliability, while lowering power consumption. The device writes with a single power supply of 1.65 to 1.95V. The total energy consumed is a function of the applied voltage, current and time of application. Since for any given voltage range, the SuperFlash technology uses less current to program and has a shorter erase time, the total energy consumed during any erase or program operation is less than alternative flash memory technologies.



  • Serial interface architecture - SPI compatible - mode 0/3
  • High speed clock frequency - up to 40MHz
  • Dual input/output support
  • Fast-read dual-output instruction
  • Fast-read dual I/O instruction
  • Superior reliability
  • Endurance - 100000 cycles
  • Greater than 20 years data retention
  • Ultralow power consumption
  • Flexible erase capability
  • Page program mode - 256 bytes/page
  • Fast erase and page-program
  • End-of-write detection - software polling the BUSY bit in status register
  • Hold pin - Suspend a serial sequence without deselecting the device
  • Write protection - Enables/disables the lock-down function of the status register
  • Software write protection - write protection through block-protection bits in status register


Computers & Computer Peripherals, Industrial, Communications & Networking, Consumer Electronics

Technical Parameters

  • Memory Type
  • Non-Volatile
  • Memory Format
  • Technology
  • Memory Size
  • 4Mb (512K x 8)
  • Memory Interface
  • SPI
  • Clock Frequency
  • 40MHz
  • Write Cycle Time Word, Page
  • 1ms
  • Voltage Supply
  • 1.65V ~ 1.95V
  • Operating Temperature
  • -40??C ~ 85??C (TA)
  • Mounting Type
  • Surface Mount
  • Package / Case
  • 8-SOIC (0.154, 3.90mm Width)
  • Supplier Device Package
  • 8-SOIC

SST25WF040B-40I/SN Documents

  • SST25WF040B Technical Documentation of Application Note

SST25WF040B-40I/SN Related Products

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  • **an S***

    wie beschrieben,bin gerne zu weiteren Geschäften bereit

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Estimated Delivery Time: Dec 03 - Dec 08 days (choose Expedited at checkout).

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  • Shipping Type
  • Ship Fee
  • Lead Time
  • $20.00-$40.00 (0.50 KG)
  • 2-5 days
  • $20.00-$40.00 (0.50 KG)
  • 3-7 days
  • $20.00-$45.00 (0.50 KG)
  • 2-5 days
  • $25.00-$65.00 (0.50 KG)
  • 2-5 days
  • $25.00-$45.00 (0.50 KG)
  • 5-14 days
  • $2.00-$3.00 (0.10 KG)
  • 7-30 days

Processing Time:Shipping fee depend on different zone and country.


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  • Hand Fee
  • Payment Site
  • charge US$30.00 banking fee.
  • charge 4.0% service fee.
  • charge 3.5% service fee.
  • charge US$0.00 banking fee.
  • charge US$0.00 banking fee.

We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

    Step2: Vacuum Packaging

  • Step3:Anti-static bag

    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

    Step5: Packaging Boxes

  • Step6:bar-code shipping tag

    Step6: Bar-Code Shipping Tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

Jotrin ESD packing


1.We provide 90 days warranty.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that SST25WF040B-40I/SN is the original manufacturer or agent of MICROCHIP?
We have a professional business development department to strictly test and verify the qualifications of MICROCHIP original manufacturers and agents. All MICROCHIP suppliers must pass the qualification review before they can publish their SST25WF040B-40I/SN devices; we pay more attention to the channels and quality of SST25WF040B-40I/SN products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of SST25WF040B-40I/SN chips? Including MICROCHIP original factory information, FLASH application, SST25WF040B-40I/SN pictures?
You can use Jotrin's intelligent search engine, or filter by Serial Flash Products category, or find it through Microchip Technology, Inc Information page.
Q: Are the MICROCHIP's SST25WF040B-40I/SN price and stock displayed on the platform accurate?
The MICROCHIP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for SST25WF040B-40I/SN, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
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TT Bank, Paypal, Credit Card, Western Union, and Escrow is all acceptable.
Q: How is the shipping arranged and track my package?
Customers can choose industry-leading freight companies, including DHL, FedEx, UPS, TNT, and Registered Mail.
Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of SST25WF040B-40I/SN?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the SST25WF040B40ISN we delivered, we will accept the replacement or return of the SST25WF040B-40I/SN only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of SST25WF040B-40I/SN.
(3)The SST25WF040B-40I/SN is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as SST25WF040B-40I/SN datasheet pdf, SST25WF040B pin diagram?
Need any After-Sales service, please feel free contact us:

Microchip Technology, Inc

Microchip Technology Inc. is a leading manufacturer of microcontroller and analog products, providing low-risk product development, lower total system cost, and faster time to market for thousands of diverse customer applications worldwide. Microchip offers outstanding technical support along with d...
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