Products > Integrated Circuits (ICs) > SST49LF004B-33-4C-NHE-T

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4 Mbit Firmware Hub

  • Manufacturer :
  • Package/Case :
  • PLCC32
  • Product Categories :
  • Integrated Circuits (ICs)
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 155


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SST49LF004B-33-4C-NHE-T Product Details


The SST49LF004B flash memory devices are designed to interface with host controllers (chipsets) that support a lowpin-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.

The SST49LF004B flash memory devices are manufactured with SST’s proprietary, high-performance SuperFlash technology. The split-gate cell design and thick-oxide tunneling injector attain greater reliability and manufacturability compared with alternative approaches. The SST49LF004B devices significantly improve performance and reliability, while lowering power consumption. The SST49LF004B devices write (Program or Erase) with a single 3.0-3.6V power supply.

The SST49LF004B use less energy during Erase and Program than alternative flash memory technologies. 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. 

The SuperFlash technology provides fixed Erase and Program times, independent of the number of Erase/Program cycles that have occurred. This means the system software or hardware does not have to be calibrated or correlated to the cumulative number of Erase cycles as is necessary with alternative flash memory technologies, whose Erase and Program times increase with accumulated Erase/Program cycles.


• 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)


SST49LF004B-33-4C-NHE-T Pinout
(Picture: Pinout)

Technical Parameters

  • Manufacturer
  • Packing
  • Tape & Reel (TR)/Cut Tape (CT)/Tray/Tube
  • RoHs Status
  • Lead free / RoHS Compliant
  • Package/Case
  • PLCC32

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

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    90 days quality guarantee for all products.


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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.

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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-NHE-T is the original manufacturer or agent of METATECH?
We have a professional business development department to strictly test and verify the qualifications of METATECH original manufacturers and agents. All METATECH suppliers must pass the qualification review before they can publish their SST49LF004B-33-4C-NHE-T devices; we pay more attention to the channels and quality of SST49LF004B-33-4C-NHE-T 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-NHE-T chips? Including METATECH original factory information, application, SST49LF004B-33-4C-NHE-T pictures?
You can use Jotrin's intelligent search engine, or filter by Integrated Circuits (ICs) category, or find it through METATECH brand manufacturer page.
Q: Are the METATECH's SST49LF004B-33-4C-NHE-T price and stock displayed on the platform accurate?
The METATECH'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-NHE-T, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of SST49LF004B-33-4C-NHE-T?
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 SST49LF004B334CNHET we delivered, we will accept the replacement or return of the SST49LF004B-33-4C-NHE-T 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-NHE-T.
(3)The SST49LF004B-33-4C-NHE-T 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.
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