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Microchip Technology SST49LF080A-33-4C-WHE-T
- Part No.:
- SST49LF080A-33-4C-WHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST49LF080A-33-4C-WHE-T.pdf
- Description:
- IC FLASH 8MBIT PAR 33MHZ 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
SST49LF080A-33-4C-WHE-T from Microchip Technology (formerly Silicon Storage Technology) is an 8 Mbit LPC interface flash memory IC designed for BIOS/firmware storage in PC and Internet appliance platforms compliant with Intel LPC Interface Specification 1.0. It delivers 1024K × 8 organization, single 3.0–3.6V operation, 33 MHz clock support, and hardware write protection via WP# and TBL# pins.
For engineers reviewing the SST49LF080A-33-4C-WHE-T datasheet, SST49LF080A-33-4C-WHE-T pinout, SST49LF080A-33-4C-WHE-T application, or SST49LF080A-33-4C-WHE-T equivalent, this page provides verified technical context, LPC/PP mode behavior, sector/block erase timing, SuperFlash® reliability metrics, and TSOP-32 package–specific pin mapping - all confirmed from Microchip's official DS20005086B datasheet.
Technical Context
The SST49LF080A-33-4C-WHE-T implements a dual-mode architecture: LPC interface mode uses LAD[3:0], LFRAME#, LCLK, and RST#/INIT# for byte-level read/write over a 4-bit multiplexed bus at up to 33 MHz; Parallel Programming (PP) mode employs 11-pin multiplexed address (A10–A0) and 8-bit data (DQ7–DQ0) with R/C# for row/column selection during high-speed production programming.
Its SuperFlash® technology features split-gate cells and thick-oxide tunneling injectors, enabling fixed 18 ms sector/block erase time independent of program/erase cycle count, 100,000 endurance cycles, and >100 years data retention - eliminating software calibration required by conventional flash technologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (1024K × 8), supporting full BIOS/firmware images in legacy PC and embedded x86 platforms. |
| Interface Standard | Intel LPC Interface Specification 1.0 - enables direct integration into southbridge-connected firmware buses without protocol translation. |
| Erase Granularity | Uniform 4 KByte sectors and 64 KByte overlay blocks; top 64 KByte boot block protected independently via TBL# pin. |
| Write Timing | 14 µs typical byte-program time; 70 ms chip-erase time in PP mode only - critical for factory programming throughput. |
| Supply Voltage | 3.0–3.6V single supply - compatible with standard 3.3V system rails and eliminates need for voltage translators. |
| Reliability | 100,000 program/erase cycles typical endurance; >100 years data retention - validated for long-lifecycle industrial and computing applications. |
| Power Consumption | 6 mA active read current; 10 µA standby current - reduces thermal load and supports low-power system states. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, lead-free. Pinout conforms to Figure 3 and Table 1 of DS20005086B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LAD[3:0] | LPC Address/Data Bus | 4-bit multiplexed bidirectional bus for LPC command, address, and data transfer - requires external pull-ups and timing alignment to LCLK. |
| LCLK | LPC Clock Input | Accepts up to 33 MHz system clock; synchronizes all LPC read/write cycles and frame timing. |
| LFRAME# | LPC Frame Control | Active-low signal initiating each LPC transaction; also used to abort ongoing cycles when reasserted. |
| WP# | Hardware Write Protect | Active-low global lock preventing program/erase of non-boot sectors - must be hardwired high or low; cannot float. |
| TBL# | Top Boot Block Lock | Active-low protection for highest 64 KByte boot region - operates independently of WP# for layered security. |
| ID[3:0] | Device Identification | Strapped inputs enabling up to 16 devices on same LPC bus; boot device requires ID[3:0] = 0000. |
| GPI[4:0] | General Purpose Inputs | Five user-configurable status inputs readable via GPI_REG register - supports board-specific configuration detection. |
| MODE | Interface Mode Select | High = Parallel Programming (PP) mode; Low = LPC mode - must be set at power-up and held static during operation. |
| RST# / INIT# | Reset Inputs | Dual active-low reset pins with identical internal function; ensures robust initialization in LPC-hosted systems. |
| VDD / VSS | Power Supply | 3.0–3.6V core supply with mandatory 0.1 µF ceramic + 4.7 µF electrolytic decoupling per design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell architecture with thick-oxide tunneling injector delivers fixed 18 ms erase time regardless of cumulative P/E cycles - removes runtime calibration overhead. |
| LPC + PP Dual Interface | Single device supports both in-system LPC operation (for field updates) and high-speed parallel programming (for manufacturing), reducing BOM and test complexity. |
| Hardware Write Protection | Independent WP# (full array) and TBL# (top 64 KB) pins enable hierarchical firmware security - prevents accidental corruption of boot code or system firmware. |
| End-of-Write Detection | Data# Polling (DQ7) and Toggle Bit (DQ6) provide deterministic software-controlled completion signaling - eliminates fixed delays and optimizes host CPU utilization. |
| Multi-Device LPC Support | ID[3:0] strapping and address decoding (A24:A23, A21:A20) allow up to 16 SST49LF080A-33-4C-WHE-T devices on one LPC bus - scales memory density without bridge logic. |
Applications
| BIOS Firmware Storage | Embedded Controller Code |
|---|---|
|
Use Scenario: Storing and executing x86 platform BIOS/UEFI firmware in desktop, laptop, and server motherboards. IC Role / Device Role / Timing Role: Primary nonvolatile firmware storage device interfacing directly with Intel southbridge LPC controller at 33 MHz. Use Value: Hardware write protection (WP#/TBL#) prevents unauthorized modification of boot code; SuperFlash® endurance ensures >10-year field reliability. |
Use Scenario: Hosting firmware for embedded controllers (ECs) in notebooks and thin clients requiring secure, low-latency code execution. IC Role / Device Role / Timing Role: LPC-connected flash providing fast read access to EC microcode with minimal bus loading due to 4-bit LAD interface. Use Value: Dual-mode operation allows factory programming via PP mode and in-field updates via LPC - streamlining production and service workflows. |
| Industrial PC Boot Memory | Internet Appliance Firmware |
|
Use Scenario: Boot image storage in fanless industrial PCs deployed in automation, kiosk, and medical equipment. IC Role / Device Role / Timing Role: LPC flash delivering deterministic 14 µs byte-program and 18 ms sector-erase for reliable firmware recovery operations. Use Value: 100,000-cycle endurance and >100-year data retention meet extended product lifecycle requirements without refresh cycles. |
Use Scenario: Firmware storage in network-attached storage (NAS), IP cameras, and smart home gateways. IC Role / Device Role / Timing Role: Low-pin-count flash minimizing PCB footprint while supporting JEDEC SDP command set for standardized firmware updates. Use Value: GPI[4:0] inputs enable board-specific feature detection (e.g., model variant, regional settings) during boot initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPC flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W39L080PZ | Same 8 Mbit density, LPC 1.0 compliant, but uses conventional NOR architecture - erase times increase with P/E cycling. | Lacks SuperFlash® fixed-timing guarantee; requires host-side timing calibration after ~50k cycles. | Choose for cost-sensitive designs where lifetime P/E count is low and firmware update frequency is infrequent. |
| Macronix MX29LV800CTTI-90G | 8 Mbit CMOS flash with parallel interface only - no native LPC support; requires external LPC-to-parallel bridge. | Increases BOM count and PCB area; incompatible with direct LPC southbridge connection. | Consider only if existing design already uses parallel flash infrastructure and LPC bridge ICs are available. |
Compared with Winbond W39L080PZ and Macronix MX29LV800CTTI-90G, the SST49LF080A-33-4C-WHE-T uniquely combines native LPC 1.0 compliance, SuperFlash® fixed-timing reliability, and dual-mode programmability - making it optimal for new x86 platform designs requiring zero-burden firmware security and longevity.
Availability
SST49LF080A-33-4C-WHE-T is available at Aetrix Electronics and suitable for BIOS firmware storage, embedded controller code hosting, and industrial PC boot memory requiring stable component supply across multi-year production cycles.
Supply support for SST49LF080A-33-4C-WHE-T 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 acquired Silicon Storage Technology (SST) in 2016 and maintains full support for the SuperFlash® product line, including process control, qualification, and long-term supply assurance.
The SST49LF080A-33-4C-WHE-T belongs to Microchip's legacy LPC flash family, engineered specifically for Intel-compatible computing platforms requiring secure, standards-compliant, and field-upgradable firmware storage.
FAQ
What interface modes does the SST49LF080A-33-4C-WHE-T support?
The SST49LF080A-33-4C-WHE-T supports two distinct interface modes: LPC mode for in-system operation using LAD[3:0], LCLK, and LFRAME#; and Parallel Programming (PP) mode for high-speed factory programming using multiplexed A10–A0 and DQ7–DQ0. MODE pin state at power-up determines active mode - low for LPC, high for PP. Both modes are fully documented in DS20005086B Section 7 and Section 8.
Does the SST49LF080A-33-4C-WHE-T require external voltage regulation?
No - the SST49LF080A-33-4C-WHE-T operates from a single 3.0–3.6V supply and is fully compatible with standard 3.3V system rails. However, Microchip mandates decoupling: a 0.1 µF ceramic capacitor placed ≤1 cm from VDD/VSS, plus a 4.7 µF electrolytic capacitor within 5 cm. These values are specified in DS20005086B Section 10 "Design Considerations" to ensure stable operation during erase/program transients.
How is hardware write protection implemented on the SST49LF080A-33-4C-WHE-T?
The SST49LF080A-33-4C-WHE-T implements two independent hardware write protection mechanisms: WP# pin locks all sectors except the top 64 KByte boot block when asserted low; TBL# pin locks only the top 64 KByte boot block when asserted low. Both pins must be hardwired - floating is prohibited - and protection state must be set before any program/erase operation begins, per DS20005086B Section 9.
What is the significance of SuperFlash® technology in the SST49LF080A-33-4C-WHE-T?
SuperFlash® technology in the SST49LF080A-33-4C-WHE-T uses a split-gate cell and thick-oxide tunneling injector to deliver fixed 18 ms sector/block erase time regardless of accumulated program/erase cycles - unlike conventional flash where erase time degrades over lifetime. This eliminates host software calibration and guarantees predictable firmware update timing across the full 100,000-cycle endurance spec, as confirmed in DS20005086B Sections 1 and 2.
Can multiple SST49LF080A-33-4C-WHE-T devices share the same LPC bus?
Yes - up to 16 SST49LF080A-33-4C-WHE-T devices can operate on a single LPC bus using ID[3:0] strapping. The boot device must use ID[3:0] = 0000; subsequent devices increment sequentially (0001, 0010, etc.). Address decoding uses A24:A23 and A21:A20 bits to select the correct device, as defined in DS20005086B Table 7 and Section 14 "Multiple Device Selection".
SST49LF080A-33-4C-WHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST49
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not 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:
- 32-TSOP
SST49LF080A-33-4C-WHE-T FAQ
1.How can I place an order for SST49LF080A-33-4C-WHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST49LF080A-33-4C-WHE-T 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 SST49LF080A-33-4C-WHE-T reliable?
The price and inventory of SST49LF080A-33-4C-WHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST49LF080A-33-4C-WHE-T is usually 5 days.
3.What payment methods are accepted for SST49LF080A-33-4C-WHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST49LF080A-33-4C-WHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST49LF080A-33-4C-WHE-T?
SST49LF080A-33-4C-WHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST49LF080A-33-4C-WHE-T 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 SST49LF080A-33-4C-WHE-T?
For technical support, including SST49LF080A-33-4C-WHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST49LF080A-33-4C-WHE-T requirements.
6.How does Aetrix verify that SST49LF080A-33-4C-WHE-T is sourced from the original manufacturer or authorized distributors?
All SST49LF080A-33-4C-WHE-T 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 SST49LF080A-33-4C-WHE-T meets industry standards.
7.What is the process for return or replacement of SST49LF080A-33-4C-WHE-T?
All SST49LF080A-33-4C-WHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST49LF080A-33-4C-WHE-T, 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 SST49LF080A-33-4C-WHE-T part is unused and in its original packaging.
Return procedure for SST49LF080A-33-4C-WHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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