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Microchip Technology SST49LF016C-33-4C-NHE-T
- Part No.:
- SST49LF016C-33-4C-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST49LF016C-33-4C-NHE-T.pdf
- Description:
- IC FLASH 16MBIT PAR 33MHZ 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,486
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Product details
Overview
SST49LF016C-33-4C-NHE-T from Microchip Technology is a 16 Mbit (2M × 8) LPC Serial Flash memory IC designed for system firmware storage in host controllers supporting the Low Pin Count (LPC) interface. It operates at 3.0–3.6 V, supports 33 MHz clock frequency, delivers 15.6 MB/s burst-read throughput, and features hardware write protection via WP#/AAI and TBL# pins for boot-block and main-memory sectors.
For engineers reviewing the SST49LF016C-33-4C-NHE-T datasheet, SST49LF016C-33-4C-NHE-T pinout, SST49LF016C-33-4C-NHE-T application, or SST49LF016C-33-4C-NHE-T equivalent, this device serves as a legacy LPC firmware memory solution with AAI programming mode, 256-bit Security ID, uniform 4 KByte sectors, and RoHS-compliant 40-lead TSOP packaging - critical for BIOS/UEFI, embedded controller, and industrial system firmware updates.
Technical Context
The SST49LF016C-33-4C-NHE-T implements a 5-signal LPC bus interface (LCLK, LAD[3:0], LFRAME#, RST#, INIT#) compliant with LPC Interface Specification v1.1, enabling firmware read/write cycles of 1–128 bytes without requiring parallel address/data buses. Its SuperFlash technology provides fixed erase/program timing independent of cycle count, eliminating software calibration.
It supports two operational modes: standard LPC mode (WP#/AAI at VIL/VIH) and Auto Address Increment (AAI) mode (WP#/AAI at 9 V), where multi-byte programming occurs without reissuing address commands. Block locking registers and hardware pins (TBL#, WP#/AAI) provide hierarchical protection for boot code and parameter blocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 × 8 bits) - sufficient for full BIOS/UEFI firmware images in compact embedded systems. |
| Interface Standard | LPC v1.1 - reduces host controller pin count from 28 (parallel flash) to 5 signals, lowering ASIC cost and PCB routing complexity. |
| Burst Read Throughput | 15.6 MB/s at 33 MHz - enables fast firmware loading during boot or recovery sequences. |
| Write Protection | Dual-layer: hardware (WP#/AAI & TBL# pins) + software (block locking registers) - prevents accidental overwrite of boot code or configuration data. |
| Endurance & Retention | 100,000 program/erase cycles typical; >100 years data retention - validated for long-life industrial and server platforms. |
| Security ID | 256-bit space: 64-bit factory-unique ID + 192-bit OTP - supports secure boot authentication and device identity binding. |
| Power Supply | Single 3.0–3.6 V supply - eliminates need for high-voltage programming circuitry during in-system writes. |
Pinout & Package
Package: 40-lead TSOP (10 mm × 20 mm), RoHS-compliant, surface-mount.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LAD[3:0] | LPC Address/Data Bus | 4-bit bidirectional serial bus carrying addresses, commands, and data - replaces 8-bit parallel bus, reducing signal count and EMI. |
| LCLK | LPC Clock Input | Accepts 33 MHz host clock; synchronizes all LPC transactions - defines maximum firmware read bandwidth. |
| LFRAME# | LPC Frame Control | Active-low signal indicating start/abort of LPC cycle - enables deterministic bus arbitration and error recovery. |
| WP#/AAI | Write Protect / AAI Enable | Low = hardware write protect for non-boot blocks; 9 V = enters AAI mode for rapid factory programming. |
| TBL# | Top Block Lock | Low = hardware write protection for 16 KByte boot block - ensures bootloader integrity during field updates. |
| ID[3:0] | Device Identification | Strapped inputs selecting one of 16 devices on shared LPC bus - required for multi-flash configurations in modular systems. |
| GPI[4:0] | General Purpose Inputs | Five user-configurable digital inputs readable via LPC registers - adds board-level flexibility without extra GPIO ICs. |
| RST# / INIT# | Reset Inputs | Dual active-low reset pins (internally OR'd) - ensures reliable initialization during power-up or system recovery. |
| RY/BY# / LD# | Ready/Busy & Load Enable | Open-drain status flag (RY/BY#) toggled by LD# to indicate buffer readiness or programming completion in AAI mode. |
Key Features
| Feature | Design Value |
|---|---|
| LPC Burst-Read Performance | 15.6 MB/s at 33 MHz - cuts firmware load time vs. legacy SPI or parallel flash, improving boot speed in x86-based embedded systems. |
| Auto Address Increment (AAI) | Enables multi-byte programming with single address setup under 9 V on WP#/AAI - reduces factory programming time to ~4 seconds for full chip rewrite. |
| Uniform 4 KByte Sectors | 35 overlay blocks including 1×16 KB boot block, 3×8/32 KB parameter blocks, and 31×64 KB main blocks - supports granular firmware partitioning and OTA update schemes. |
| Program/Erase-Suspend | Allows read access to other blocks during active program/erase - enables real-time firmware validation without halting system operation. |
| Security ID Architecture | 64-bit factory-unique ID + 192-bit OTP space - enables cryptographic key binding and anti-cloning measures in certified platforms. |
Applications
| BIOS/UEFI Firmware Storage | Embedded Controller (EC) Code |
|---|---|
Use Scenario: Storing and updating x86 platform BIOS/UEFI firmware in desktop, server, and industrial motherboards. IC Role / Device Role / Timing Role: LPC-connected firmware memory providing boot-time instruction fetch and runtime update capability. Use Value: 15.6 MB/s burst read accelerates POST execution; hardware write protection prevents corruption during power loss or failed updates. |
Use Scenario: Hosting firmware for keyboard controllers, thermal management, and power sequencing in laptops and thin clients. IC Role / Device Role / Timing Role: Secondary LPC flash storing EC microcode with low-latency access during system suspend/resume transitions. Use Value: Uniform 4 KByte sectors enable atomic EC firmware patches; GPI[4:0] inputs support board-specific configuration detection. |
| Industrial PLC Boot Memory | Network Appliance Firmware |
Use Scenario: Storing boot loader and real-time OS kernel in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile firmware memory interfacing directly with Intel/AMD PCH LPC bus for deterministic boot. Use Value: 100,000-cycle endurance and >100-year data retention ensure reliability across 15+ year product lifecycles. |
Use Scenario: Holding firmware images for managed switches, firewalls, and SD-WAN edge devices requiring secure remote updates. IC Role / Device Role / Timing Role: Secure firmware repository supporting authenticated boot via 256-bit Security ID and block-locking registers. Use Value: OTP portion of Security ID stores public key hashes; TBL#/WP# pins enforce dual-layer protection against unauthorized reflash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPC firmware memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q16JVSSIQ | Quad SPI interface (not LPC); 3.3 V only; no hardware TBL#/WP# pins; lacks AAI mode and Security ID. | Requires SPI host controller and driver adaptation; unsuitable for legacy LPC-based chipsets without bridge logic. | Select only if migrating to SPI-based architecture and firmware signing is handled externally. |
| Macronix MX25L1606EM2I-12G | Standard SPI interface; 3.3 V; no LPC compliance; no ID[3:0] or GPI pins; no AAI or Security ID features. | Cannot replace SST49LF016C-33-4C-NHE-T on LPC bus without hardware redesign; limited to new designs with SPI-capable SoCs. | Consider for cost-sensitive new designs where LPC compatibility is not required and security features are implemented in software. |
Compared with Winbond W25Q16JVSSIQ and Macronix MX25L1606EM2I-12G, the SST49LF016C-33-4C-NHE-T delivers native LPC integration, hardware-assisted boot-block protection, and factory-programmed identity - making it irreplaceable in existing x86 platform designs without altering chipset interface logic or compromising firmware integrity mechanisms.
Availability
SST49LF016C-33-4C-NHE-T is available at Aetrix Electronics and suitable for BIOS/UEFI firmware storage, embedded controller code hosting, and industrial PLC boot memory applications requiring stable component supply throughout extended product lifecycles.
Supply support for SST49LF016C-33-4C-NHE-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on reliability, longevity, and embedded system integration.
The SST49LF016C product line was developed specifically for LPC-based system firmware applications in x86 platforms, delivering high-speed, secure, and pin-efficient flash memory with robust write protection and identity features.
FAQ
What is the primary interface protocol supported by the SST49LF016C-33-4C-NHE-T?
The SST49LF016C-33-4C-NHE-T implements the Low Pin Count (LPC) v1.1 interface, using five dedicated signals (LCLK, LAD[3:0], LFRAME#, RST#, INIT#) to replace traditional 28-pin parallel flash buses. This enables direct connection to Intel/AMD PCH chipsets for BIOS/UEFI firmware storage without external logic. The SST49LF016C-33-4C-NHE-T does not support SPI, I²C, or parallel interfaces - its functionality is strictly defined by LPC specification compliance.
Does the SST49LF016C-33-4C-NHE-T support in-system programming?
Yes, the SST49LF016C-33-4C-NHE-T supports full in-system programming via its LPC interface at standard 3.0–3.6 V supply, enabling field firmware updates without removing the device. It also supports rapid factory programming using Auto Address Increment (AAI) mode when WP#/AAI is driven to 9 V. Both modes use the same LAD[3:0] bus and require no external high-voltage generators for standard LPC writes.
What package type is used for the SST49LF016C-33-4C-NHE-T?
The SST49LF016C-33-4C-NHE-T is packaged in a 40-lead TSOP (10 mm × 20 mm) with RoHS-compliant lead finish. This matches the pinout shown in Figure 5 of the official Microchip datasheet DS20005029B. It is not offered in PLCC or 32-lead TSOP variants - the "-NHE-T" suffix explicitly denotes the 40-lead TSOP configuration.
How does hardware write protection work on the SST49LF016C-33-4C-NHE-T?
The SST49LF016C-33-4C-NHE-T implements dual hardware write protection: WP#/AAI pin protects all non-boot blocks when low, and TBL# pin protects the top 16 KByte boot block when low. Both pins must be actively driven (not floated) and remain stable during erase/program operations. These hardware protections are OR'd with corresponding software block-locking registers - ensuring that even if register bits are cleared, physical pin state enforces protection.
Is the SST49LF016C-33-4C-NHE-T still in active production?
No - the SST49LF016C-33-4C-NHE-T is an obsolete (EOL) device per Microchip's official documentation (DS20005029B, Feb 2016). While Aetrix Electronics maintains legacy inventory and supply chain support, design-in of this part is not recommended for new products. Customers should contact Microchip Sales for officially endorsed replacement parts compatible with existing LPC firmware architectures.
SST49LF016C-33-4C-NHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST49
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 16Mbit
- Memory Organization:
- 2M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- 33 MHz
- Write Cycle Time - Word, Page:
- 10µs
- Access Time:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST49LF016C-33-4C-NHE-T FAQ
1.How can I place an order for SST49LF016C-33-4C-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST49LF016C-33-4C-NHE-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 SST49LF016C-33-4C-NHE-T reliable?
The price and inventory of SST49LF016C-33-4C-NHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST49LF016C-33-4C-NHE-T is usually 5 days.
3.What payment methods are accepted for SST49LF016C-33-4C-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST49LF016C-33-4C-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST49LF016C-33-4C-NHE-T?
SST49LF016C-33-4C-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST49LF016C-33-4C-NHE-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 SST49LF016C-33-4C-NHE-T?
For technical support, including SST49LF016C-33-4C-NHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST49LF016C-33-4C-NHE-T requirements.
6.How does Aetrix verify that SST49LF016C-33-4C-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST49LF016C-33-4C-NHE-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 SST49LF016C-33-4C-NHE-T meets industry standards.
7.What is the process for return or replacement of SST49LF016C-33-4C-NHE-T?
All SST49LF016C-33-4C-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST49LF016C-33-4C-NHE-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 SST49LF016C-33-4C-NHE-T part is unused and in its original packaging.
Return procedure for SST49LF016C-33-4C-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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