Products > Integrated Circuits (ICs) > SST49LF004B-33-4C-WHE
  • SST49LF004B-33-4C-WHE

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4 Mbit Firmware Hub

  • Package/Case :
  • TSOP-32
  • Product Categories :
  • Integrated Circuits (ICs)
  • RoHs Status:
  • Lead free/RoHS Compliant
  • In-stock:
  • 110


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SST49LF004B-33-4C-WHE Product Details

The SST49LF004B flash memory devices are designed to interface with host controllers (chipsets) that support a low pin-count (LPC) interface for BIOS applications. The SST49LF004B devices comply with Intel’s LPC Interface Specification, supporting single-byte Firmware Memory cycle type.
The SST49LF004B devices are backward compatible to the SST49LF004A Firmware Hub. In this document, FWH mode in the SST49LF004A specification is referenced as the Firmware Memory Read/Write cycle. Two interface modes are supported by the SST49LF004B: LPC mode (Firmware Memory cycle types) for in-system operations and Parallel Programming (PP) mode to interface with programming equipment.



• 4 Mbit SuperFlash memory array for code/data storage
– SST49LF004B: 512K x8 (4 Mbit)
• Conforms to Intel LPC Interface Specification
– Supports Single-Byte Firmware Memory Cycle Type
• Flexible Erase Capability
– Uniform 4 KByte sectors
– Uniform 64 KByte overlay blocks
– Chip-Erase for PP Mode Only
• Single 3.0-3.6V Read and Write Operations
• Superior Reliability
– Endurance: 100,000 Cycles (typical)
– Greater than 100 years Data Retention
• Low Power Consumption
– Active Read Current: 6 mA (typical)
– Standby Current: 10 µA (typical)
• Fast Sector-Erase/Byte-Program Operation
– Sector-Erase Time: 18 ms (typical)
– Block-Erase Time: 18 ms (typical)
– Chip-Erase Time: 70 ms (typical)
– Byte-Program Time: 14 µs (typical)
– Chip Rewrite Time: 8 seconds (typical)
– Single-pulse Program or Erase
– Internal timing generation
• CMOS and PCI I/O Compatibility
• Two Operational Modes
– Low Pin Count (LPC) interface mode for in-system operation
– Parallel Programming (PP) mode for fast production programming
• Low Pin Count (LPC) Interface Mode
– LPC bus interface supporting byte Read and Write
– 33 MHz clock frequency operation
– WP# and TBL# pins provide hardware write protect for entire chip and/or top Boot Block
– Block Locking Registers for individual block Write-Lock and Lock-Down protection
– JEDEC Standard SDP Command Set
– Data# Polling and Toggle Bit for End-of-Write detection
– 5 GPI pins for system design flexibility
– 4 ID pins for multi-chip selection
• Parallel Programming (PP) Mode
– 11-pin multiplexed address and 8-pin data I/O interface
– Supports fast In-System or PROM programming for manufacturing
• Packages Available
– 32-lead PLCC
– 32-lead TSOP (8mm x 14mm)
• All non-Pb (lead-free) devices are RoHS compliant

Technical Parameters

  • Manufacturer
  • SST
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free/RoHS Compliant
  • Package/Case
  • TSOP-32

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Estimated Delivery Time: Jun 24 - Jun 29 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 SST49LF004B-33-4C-WHE is the original manufacturer or agent of SST?
We have a professional business development department to strictly test and verify the qualifications of SST original manufacturers and agents. All SST suppliers must pass the qualification review before they can publish their SST49LF004B-33-4C-WHE devices; we pay more attention to the channels and quality of SST49LF004B-33-4C-WHE products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of SST49LF004B-33-4C-WHE chips? Including SST original factory information, application, SST49LF004B-33-4C-WHE pictures?
You can use Jotrin's intelligent search engine, or filter by Integrated Circuits (ICs) category, or find it through Silicon Storage Technology (Microchip) Information page.
Q: Are the SST's SST49LF004B-33-4C-WHE price and stock displayed on the platform accurate?
The SST's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for SST49LF004B-33-4C-WHE, 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 SST49LF004B-33-4C-WHE?
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 SST49LF004B334CWHE we delivered, we will accept the replacement or return of the SST49LF004B-33-4C-WHE 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 SST49LF004B-33-4C-WHE.
(3)The SST49LF004B-33-4C-WHE 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 SST49LF004B-33-4C-WHE datasheet pdf, SST49LF004B pin diagram?
Need any After-Sales service, please feel free contact us:

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