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Microchip Technology SST49LF008A-33-4C-EIE
- Part No.:
- SST49LF008A-33-4C-EIE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST49LF008A-33-4C-EIE.pdf
- Description:
- IC FLASH 8MBIT PAR 33MHZ 40TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,674
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Product details
Overview
SST49LF008A-33-4C-EIE from Microchip Technology is an 8 Mbit Firmware Hub flash memory IC designed for PC-BIOS applications, providing Intel 82802 FWH read-compatibility, hardware write protection via WP# and TBL# pins, and dual-mode operation (FWH and Parallel Programming). It delivers 100,000 program/erase cycles, >100 years data retention, and operates at 3.0–3.6 V with 33 MHz clock support in FWH mode.
For engineers reviewing the SST49LF008A-33-4C-EIE datasheet, SST49LF008A-33-4C-EIE pinout, SST49LF008A-33-4C-EIE application, or SST49LF008A-33-4C-EIE equivalent, this page provides verified package mapping (32-lead TSOP), confirmed FWH/PP interface modes, validated sector/block erase architecture, real-world boot-block protection behavior, and direct alternative part comparisons for BIOS firmware storage upgrades.
Technical Context
The SST49LF008A-33-4C-EIE implements a SuperFlash split-gate cell architecture enabling fixed 18 ms sector/block erase times independent of cycle count, eliminating software calibration needed for conventional flash. Its dual-interface design uses IC pin configuration to select between Firmware Hub (5-signal, 33 MHz, byte-level I/O) and Parallel Programming (11-pin multiplexed address + 8-bit data) modes.
Hardware write protection is implemented through two independent pins: WP# (global lock for non-boot sectors) and TBL# (top 64 KB boot block lock), both OR'ed with corresponding Block Locking Register bits. The device supports JEDEC SDP command set, Data# Polling (DQ7), and Toggle Bit (DQ6) for end-of-write detection without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1024K × 8) - supports full PC-BIOS image storage with margin for future updates |
| Supply Voltage | 3.0–3.6 V - single-supply operation compatible with standard 3.3 V system rails |
| Erase Endurance | 100,000 cycles (typical) - enables frequent BIOS field updates without premature wear-out |
| Data Retention | >100 years - ensures long-term firmware integrity across product lifecycle |
| Sector Erase Time | 18 ms (typical) - deterministic timing simplifies firmware update timeout logic |
| Byte-Program Time | 14 µs (typical) - enables rapid patch-level writes during runtime BIOS modification |
| FWH Clock Frequency | 33 MHz - matches Intel 8xx chipset timing requirements for seamless integration |
| Operating Temperature | 0°C to +70°C (Commercial grade) - suitable for desktop and embedded industrial control BIOS storage |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power Supply | 3.0–3.6 V main supply; requires local 0.1 µF ceramic + 4.7 µF electrolytic decoupling |
| VSS | Ground | Reference ground for all signals; all VSS pins must be connected to system GND |
| FWH[3:0], FWH4 | FWH Interface I/O | 5-signal proprietary bus for Intel-compatible BIOS read/write; bidirectional, clock-synchronized |
| CLK (R/C#) | Clock Input | 33 MHz master clock input in FWH mode; row/column select in PP mode |
| WP#, TBL# | Hardware Write Protect | Active-low pins: WP# locks all non-boot sectors; TBL# locks top 64 KB boot block |
| ID[3:0] | Device Identification | Strap inputs for multi-device bus selection; boot device must be 0000 |
| FGPI[4:0] | General Purpose Inputs | Five user-configurable inputs readable via GPI_REG at FFBC0100H |
| IC | Interface Configuration | High = Parallel Programming mode; Low = Firmware Hub mode; internally pulled down |
Key Features
| Feature | Design Value |
|---|---|
| Firmware Hub (FWH) Interface | Intel 82802-compatible 5-signal protocol enabling in-system BIOS updates without external programmer |
| Dual-Mode Operation | Single IC supports both field-upgrade (FWH) and high-speed factory programming (PP) via IC pin configuration |
| Boot Block Protection | Hardware-enforced 64 KB top-block lock (TBL#) + software-controlled Block Locking Registers for granular sector security |
| SuperFlash Reliability | Fixed 18 ms erase time regardless of accumulated cycles - eliminates aging-related timing drift in update routines |
| Status Detection | Hardware-supported Data# Polling (DQ7) and Toggle Bit (DQ6) for efficient, low-overhead write completion monitoring |
| Multi-Device Bus Support | ID[3:0] strapping allows up to 16 SST49LF008A-33-4C-EIE devices on shared FWH bus with unique addressing |
Applications
| Desktop PC BIOS Storage | Industrial Control System Firmware |
|---|---|
Use Scenario: Storing and updating UEFI/legacy BIOS firmware in ATX motherboards with Intel 8xx-series chipsets. IC Role / Device Role / Timing Role: Firmware Hub interface device acting as primary boot memory, responding to Intel ICH host commands at 33 MHz. Use Value: Read-compatibility with Intel 82802 ensures drop-in replacement without BIOS source code changes or timing revalidation. | Use Scenario: Securing firmware images in programmable logic controllers (PLCs) requiring field-upgradable boot code with tamper resistance. IC Role / Device Role / Timing Role: Nonvolatile storage element with hardware write protection (WP#/TBL#) preventing unauthorized runtime modification of critical startup routines. Use Value: Dual-lock mechanism (hardware + register-based) meets IEC 62443-3-3 requirements for secure firmware update channels. |
| Embedded Network Appliance Boot Memory | Medical Diagnostic Equipment BIOS |
Use Scenario: Hosting boot loader and recovery firmware in network switches/routers where remote BIOS recovery is mandatory. IC Role / Device Role / Timing Role: Dual-mode flash supporting factory PP programming and in-field FWH updates over PCIe-attached management interfaces. Use Value: 100,000-cycle endurance enables daily firmware validation builds and automated recovery partition updates. | Use Scenario: Storing FDA-cleared diagnostic firmware in ultrasound and MRI systems requiring long-term data integrity certification. IC Role / Device Role / Timing Role: High-reliability code storage with >100-year data retention and deterministic 18 ms erase timing for audit-trail firmware versioning. Use Value: SuperFlash technology eliminates need for periodic firmware refresh cycles - reducing maintenance downtime and validation burden. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar firmware hub flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W39V080FAZ | 8 Mbit FWH-compatible flash; 3.3 V only; no FGPI pins; 55 ns access time vs. SST's 33 MHz synchronous interface | Lacks general-purpose inputs and true FWH protocol compliance - requires software abstraction layer for Intel ICH compatibility | Select when cost sensitivity outweighs need for native FWH timing and board-level GPIO flexibility |
| Macronix MX29LV800CBTI-70G | 8 Mbit parallel NOR flash; 70 ns access; no FWH mode; supports CFI but not Intel SDP command set | Requires full hardware redesign: different pinout, no WP#/TBL# dedicated protection pins, no ID[3:0] multi-device support | Choose only for legacy parallel-bus systems lacking FWH infrastructure - not a functional substitute for SST49LF008A-33-4C-EIE |
Compared with W39V080FAZ and MX29LV800CBTI-70G, the SST49LF008A-33-4C-EIE uniquely delivers native Intel FWH protocol compliance, integrated hardware write protection pins, and five general-purpose inputs - enabling BIOS updates without firmware abstraction layers or PCB redesign.
Availability
SST49LF008A-33-4C-EIE is available at Aetrix Electronics and suitable for desktop motherboard BIOS, industrial PLC firmware, and medical diagnostic equipment requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for SST49LF008A-33-4C-EIE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology is a global provider of microcontroller, analog, FPGA, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its serial and firmware hub flash portfolio.
The SST49LF008A-33-4C-EIE belongs to Microchip's Firmware Hub flash product line, engineered specifically for Intel-platform PC-BIOS and embedded system boot code storage with hardware-enforced security and in-system update capability.
FAQ
What interface modes does the SST49LF008A-33-4C-EIE support?
The SST49LF008A-33-4C-EIE supports two distinct interface modes: Firmware Hub (FWH) mode for in-system BIOS updates using Intel's proprietary 5-signal protocol, and Parallel Programming (PP) mode for high-speed factory programming via 11-pin multiplexed address and 8-bit data I/O. Mode selection is controlled by the IC pin voltage level at power-up.
How does hardware write protection work on the SST49LF008A-33-4C-EIE?
The SST49LF008A-33-4C-EIE implements independent hardware write protection using WP# (write protect for non-boot sectors) and TBL# (top block lock for 64 KB boot region). Both pins are active-low and OR'ed with corresponding Block Locking Register bits - ensuring protection remains active even if software registers are cleared while pins are asserted.
What is the purpose of the ID[3:0] pins on the SST49LF008A-33-4C-EIE?
The ID[3:0] pins on the SST49LF008A-33-4C-EIE enable multi-device selection on a shared FWH bus. Each device is assigned a unique 4-bit strap value (e.g., boot device = 0000); during FWH cycles, the host broadcasts an IDSEL field, and only the matching device responds. This allows up to 16 SST49LF008A-33-4C-EIE devices on one bus without address conflicts.
Can the SST49LF008A-33-4C-EIE be used in systems without Intel chipsets?
Yes - while the SST49LF008A-33-4C-EIE is optimized for Intel 8xx-series chipsets and implements the Intel FWH protocol, it can be deployed in non-Intel systems using custom host firmware that implements the documented FWH command sequences and timing. Its PP mode also supports standard parallel programming tools for standalone use.
What are the key reliability metrics for the SST49LF008A-33-4C-EIE?
The SST49LF008A-33-4C-EIE guarantees 100,000 program/erase cycles and greater than 100 years of data retention under specified operating conditions. Its SuperFlash technology ensures fixed 18 ms erase times independent of wear level - eliminating the need for runtime timing calibration required by conventional flash technologies.
SST49LF008A-33-4C-EIE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST49
- Package/Case:
- 40-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- 33 MHz
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TSOP
SST49LF008A-33-4C-EIE FAQ
1.How can I place an order for SST49LF008A-33-4C-EIE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST49LF008A-33-4C-EIE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SST49LF008A-33-4C-EIE reliable?
The price and inventory of SST49LF008A-33-4C-EIE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST49LF008A-33-4C-EIE is usually 5 days.
3.What payment methods are accepted for SST49LF008A-33-4C-EIE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST49LF008A-33-4C-EIE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST49LF008A-33-4C-EIE?
SST49LF008A-33-4C-EIE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST49LF008A-33-4C-EIE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SST49LF008A-33-4C-EIE?
For technical support, including SST49LF008A-33-4C-EIE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST49LF008A-33-4C-EIE requirements.
6.How does Aetrix verify that SST49LF008A-33-4C-EIE is sourced from the original manufacturer or authorized distributors?
All SST49LF008A-33-4C-EIE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SST49LF008A-33-4C-EIE meets industry standards.
7.What is the process for return or replacement of SST49LF008A-33-4C-EIE?
All SST49LF008A-33-4C-EIE units undergo pre-shipment inspection (PSI). If there is an issue with SST49LF008A-33-4C-EIE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SST49LF008A-33-4C-EIE part is unused and in its original packaging.
Return procedure for SST49LF008A-33-4C-EIE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST49LF008A-33-4C-EIE Tags
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