Products > Integrated Circuits (ICs) > Memory > FM31278
  • FM31278

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5V Integrated Processor Companion with Memory

  • Package/Case :
  • SOP-14
  • Product Categories :
  • MCU
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 11


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FM31278 Product Details

The FM3127x is a family of integrated devices that includes the most commonly needed functions for processor-based systems. Major features include nonvolatile memory available in various sizes, real time clock, low-VDD reset, watchdog timer, nonvolatile event counter, lockable 64-bit serial number area, and general purpose comparator that can be used for an early power-fail (NMI) interrupt or other purpose. The family operates from 4.0 to 5.5V.


High Integration Device Replaces Multiple Parts • Serial Nonvolatile Memory • Real-time Clock (RTC) • Low Voltage Reset • Watchdog Timer • Early Power-Fail Warning/NMI • Two 16-bit Event Counters • Serial Number with Write-lock for Security

Ferroelectric Nonvolatile RAM • 4Kb, 16Kb, 64Kb, and 256Kb versions • Unlimited Read/Write Endurance • 10 year Data Retention • NoDelay™ Writes

Real-time Clock/Calendar • Backup Current under 1 µA • Seconds through Centuries in BCD format • Tracks Leap Years through 2099 • Uses Standard 32.768 kHz Crystal (12.5pF) • Software Calibration • Supports Battery or Capacitor Backup

Processor Companion • Active-low Reset Output for VDD and Watchdog • Programmable VDD Reset Trip Point • Manual Reset Filtered and Debounced • Programmable Watchdog Timer • Dual Battery-backed Event Counter Tracks System Intrusions or other Events • Comparator for Early Power-Fail Interrupt • 64-bit Programmable Serial Number with Lock

Fast Two-wire Serial Interface • Up to 1 MHz Maximum Bus Frequency • Supports Legacy Timing for 100 kHz & 400 kHz • Device Select Pins for up to 4 Memory Devices • RTC, Supervisor Controlled via 2-wire Interface

Easy to Use Configurations • Operates from 4.0 to 5.5V • 14-pin “Green”/RoHS SOIC package (-G) • Low Operating Current • -40°C to +85°C Operation


Technical Parameters

  • Manufacturer
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free / RoHS Compliant
  • Package/Case
  • SOP-14

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Estimated Delivery Time: Jun 19 - Jun 24 days (choose Expedited at checkout).

Shipping & Payment


  • 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.


  • Terms of payment
  • 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 FM31278 is the original manufacturer or agent of RAMTRON?
We have a professional business development department to strictly test and verify the qualifications of RAMTRON original manufacturers and agents. All RAMTRON suppliers must pass the qualification review before they can publish their FM31278 devices; we pay more attention to the channels and quality of FM31278 products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of FM31278 chips? Including RAMTRON original factory information, MCU application, FM31278 pictures?
You can use Jotrin's intelligent search engine, or filter by MCU category, or find it through Ramtron International Corporation (Cypress) Information page.
Q: Are the RAMTRON's FM31278 price and stock displayed on the platform accurate?
The RAMTRON's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for FM31278, 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.
Q: What forms of payment can I use in Jotrin?
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 FM31278?
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 FM31278 we delivered, we will accept the replacement or return of the FM31278 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 FM31278.
(3)The FM31278 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 FM31278 datasheet pdf, FM31278 pin diagram?
Need any After-Sales service, please feel free contact us:

Ramtron International Corporation (Cypress)

Ramtron is a fabless semiconductor company that designs, develops, and markets specialized memory, microcontroller, and integrated semiconductor solutions. As a leading supplier of integrated products and nonvolatile FRAM (Ferroelectric Random Access Memory),...
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