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Microchip Technology SST49LF016C-33-4C-NHE
- Part No.:
- SST49LF016C-33-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST49LF016C-33-4C-NHE.pdf
- Description:
- IC FLASH 16MBIT PAR 33MHZ 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,555
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Product details
Overview
SST49LF016C-33-4C-NHE from Microchip Technology is a 16 Mbit LPC Serial Flash memory IC designed for system firmware storage in host controllers supporting the Low Pin Count (LPC) interface. It operates at 33 MHz, supports 1–128 byte firmware read cycles and 1–4 byte writes, and delivers 15.6 MB/s burst-read throughput. Its SuperFlash technology enables single 3.0–3.6 V operation with 100,000 program/erase cycles and >100-year data retention.
For engineers reviewing the SST49LF016C-33-4C-NHE datasheet, SST49LF016C-33-4C-NHE pinout, SST49LF016C-33-4C-NHE application, or SST49LF016C-33-4C-NHE equivalent, key selection considerations include LPC v1.1 compliance, hardware write protection via WP#/AAI and TBL# pins, 4 KByte uniform sector architecture, AAI mode for rapid factory programming, and 32-lead PLCC package compatibility with legacy BIOS platforms.
Technical Context
The SST49LF016C-33-4C-NHE implements a 5-signal LPC bus interface (LCLK, LAD[3:0], LFRAME#, RST#, INIT#) compliant with LPC Interface Specification v1.1, reducing pin count versus parallel flash while enabling in-system and factory programming. It uses a two-cycle command set for firmware memory operations and integrates block-locking registers for per-sector read/write/lock-down protection.
Its SuperFlash split-gate cell architecture provides fixed erase/program times independent of cycle count-18 ms typical for sector/block erase and 7 µs per byte for program-eliminating software calibration. The device supports dual-mode operation: standard LPC mode (WP#/AAI at VIH/VIL) and Auto Address Increment (AAI) mode (WP#/AAI at 9 V), with RY/BY# and LD# coordinating status flag transitions during AAI programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2 M × 8 organization), directly maps to 2 MiB firmware image storage capacity |
| LPC Clock Frequency | 33 MHz - enables 15.6 MB/s burst-read transfer rate; matches standard LPC bus timing in legacy chipsets |
| Supply Voltage | 3.0–3.6 V - single-supply operation eliminates need for voltage translators in 3.3 V systems |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates across product lifecycle |
| Data Retention | >100 years - ensures BIOS/firmware integrity over extended deployment without refresh |
| Write Protection | Hardware-based via WP#/AAI (entire array) and TBL# (16 KB top boot block) - prevents accidental corruption during power loss or reset |
| Security ID | 256-bit space: 64-bit factory-unique ID + 192-bit OTP - supports secure boot authentication and device binding |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), 11.43 mm × 13.97 mm body, JEDEC MS-026AC compliant. RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LCLK | Input clock | Accepts 33 MHz host LPC clock; synchronizes all bus transactions and internal state machines |
| LAD[3:0] | Bidirectional address/data bus | Serial 4-bit multiplexed bus carrying START/IDSEL/MADDR/MSIZE/DATA fields; reduces ASIC pin count vs. parallel interface |
| LFRAME# | Frame control input | Active-low signal indicating start/abort of LPC cycle; latches START field on rising edge |
| RST# / INIT# | Reset inputs | Dual active-low reset pins internally OR'd; ensures reliable initialization during power-up or system reset |
| ID[3:0] | Device identification inputs | Strap pins enabling up to 16 devices on same LPC bus; boot device requires ID[3:0] = 0000 |
| WP#/AAI | Mode-select & write protect | At 3.3 V: enables hardware write protection; at 9 V: enters AAI mode for multi-byte factory programming |
| TBL# | Top block lock | Active-low hardware lock for 16 KB boot block; overrides software locking registers when asserted |
| RY/BY# / LD# | Status & load control | Open-drain RY/BY# indicates ready/busy; LD# toggles RY/BY# between buffer-ready and programming-complete flags in AAI mode |
| GPI[4:0] | General-purpose inputs | Five digital inputs readable via LPC registers; provide board-level configuration or status sensing without dedicated GPIO |
| VDD / VSS | Power supply | 3.0–3.6 V core supply and ground; requires local 0.1 µF ceramic + 4.7 µF electrolytic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| LPC v1.1 Compliance | Enables direct integration with Intel ICH, AMD SB, and other LPC-host chipsets without protocol translation logic |
| Uniform 4 KByte Sectors | 35 overlay blocks (1×16 KB boot, 2×8 KB, 1×32 KB, 31×64 KB) simplify firmware partitioning and update management |
| Auto Address Increment (AAI) | Reduces factory programming time to ~4 seconds for full chip rewrite using high-voltage (9 V) WP#/AAI activation |
| Program/Erase-Suspend | Allows read access to non-active blocks during background erase/program - maintains system responsiveness |
| Block Locking Registers | Software-configurable per-block read-lock, write-lock, and lock-down - enforces hierarchical firmware security policies |
Applications
| BIOS/UEFI Firmware Storage | Embedded Controller (EC) Code |
|---|---|
|
Use Scenario: Storing x86 platform BIOS or UEFI firmware images in desktop, server, and industrial motherboards. IC Role / Device Role / Timing Role: Primary non-volatile firmware memory interfacing directly with chipset LPC bus; timing-critical for POST execution. Use Value: 15.6 MB/s burst-read at 33 MHz meets BIOS fetch latency requirements; hardware write protection prevents corruption during power failure. |
Use Scenario: Hosting runtime code and configuration data for laptop embedded controllers managing keyboard, battery, thermal, and fan functions. IC Role / Device Role / Timing Role: Dedicated firmware memory for EC microcontroller; accessed via LPC for low-pin-count integration. Use Value: Uniform 4 KByte sectors enable atomic EC firmware updates; 100,000 endurance supports frequent field patches. |
| Industrial PLC Boot Memory | Legacy Industrial PC Firmware |
|
Use Scenario: Storing boot loader and real-time OS kernel in programmable logic controllers requiring long-term reliability. IC Role / Device Role / Timing Role: System boot memory mapped into CPU address space via LPC-to-PCI bridge; must retain data >100 years. Use Value: >100-year data retention and 3.0–3.6 V operation ensure firmware integrity in unattended deployments; TBL# pin secures boot loader against tampering. |
Use Scenario: Replacing obsolete parallel flash in legacy IPCs where PCB layout cannot accommodate new packages or interfaces. IC Role / Device Role / Timing Role: Drop-in LPC-compatible serial flash replacement; pinout matches 32-lead PLCC footprint of prior designs. Use Value: Identical 32-PLCC package and LPC v1.1 compliance allow direct substitution without board rework or firmware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LPC serial flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q16DVSSIG | Quad SPI interface (not LPC); 3.3 V only; no TBL#/WP# hardware lock pins; lacks AAI mode and GPI pins | Requires SPI host controller and driver stack changes; unsuitable for LPC-only chipsets like Intel ICH7–ICH10 | Select only if migrating to SPI-based architecture and redesigning firmware interface layer |
| Macronix MX25L1606EM2I-12G | Standard SPI interface; 3.3 V; no LPC compliance; no ID[3:0] multi-device support or INIT# pin | Cannot replace SST49LF016C-33-4C-NHE in existing LPC designs without hardware and BIOS modifications | Use only in new SPI-native designs where LPC compatibility is not required |
Compared with Winbond W25Q16DVSSIG and Macronix MX25L1606EM2I-12G, the SST49LF016C-33-4C-NHE uniquely delivers native LPC v1.1 compliance, hardware boot-block protection, and AAI factory programming-making it irreplaceable in legacy LPC-based BIOS platforms without interface redesign.
Availability
SST49LF016C-33-4C-NHE is available at Aetrix Electronics and suitable for BIOS firmware storage, embedded controller code hosting, industrial PLC boot memory, and legacy industrial PC firmware requiring stable component supply throughout extended product lifecycles.
Supply support for SST49LF016C-33-4C-NHE 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 industrial-grade performance.
The SST49LF016C-33-4C-NHE belongs to Microchip's legacy LPC Serial Flash product line, engineered specifically for system firmware storage in x86 platforms where low pin count, BIOS compatibility, and long-term data retention are critical.
FAQ
What is the primary interface standard supported by the SST49LF016C-33-4C-NHE?
The SST49LF016C-33-4C-NHE implements the Low Pin Count (LPC) interface per Specification v1.1, using five signals (LCLK, LAD[3:0], LFRAME#, RST#, INIT#) to replace 28-pin parallel flash buses. This enables direct connection to Intel ICH, AMD SB, and other LPC-host chipsets without protocol translation, and is explicitly confirmed in the official Microchip DS20005029B datasheet for the SST49LF016C-33-4C-NHE.
Does the SST49LF016C-33-4C-NHE support hardware write protection for the boot sector?
Yes, the SST49LF016C-33-4C-NHE provides dedicated hardware write protection for the top 16 KB boot block via the TBL# pin: when driven low, it prevents program/erase operations regardless of software lock register states. This feature is documented in the Pin Descriptions table and Write Protect / Top Block Lock section of the DS20005029B datasheet for the SST49LF016C-33-4C-NHE.
What package type is used for the SST49LF016C-33-4C-NHE?
The SST49LF016C-33-4C-NHE is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), as specified in Figure 3 and Table 1 of the Microchip DS20005029B datasheet. This package is compatible with legacy socketed BIOS flash implementations and matches the mechanical outline defined in JEDEC MS-026AC.
Can the SST49LF016C-33-4C-NHE be programmed in-system using standard LPC signaling?
Yes, the SST49LF016C-33-4C-NHE supports full in-system programming via its LPC interface, including Firmware Memory Read/Write cycles for 1–128 byte reads and 1–4 byte writes. The two-cycle command set (e.g., Program, Erase) operates entirely within standard LPC timing and signaling-no external high voltage or special programmers are required for field updates.
What is the role of the GPI[4:0] pins on the SST49LF016C-33-4C-NHE?
The GPI[4:0] pins on the SST49LF016C-33-4C-NHE serve as five general-purpose digital inputs readable through LPC registers, providing board-level flexibility for configuration strapping or status monitoring. As stated in the Pin Descriptions table (DS20005029B), these inputs must be driven to VIH or VIL-not left floating-and their values are sampled during specific LPC read cycles initiated by the host controller.
SST49LF016C-33-4C-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST49
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for SST49LF016C-33-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST49LF016C-33-4C-NHE 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 reliable?
The price and inventory of SST49LF016C-33-4C-NHE 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 is usually 5 days.
3.What payment methods are accepted for SST49LF016C-33-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST49LF016C-33-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST49LF016C-33-4C-NHE?
SST49LF016C-33-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST49LF016C-33-4C-NHE 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?
For technical support, including SST49LF016C-33-4C-NHE 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 requirements.
6.How does Aetrix verify that SST49LF016C-33-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST49LF016C-33-4C-NHE 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 meets industry standards.
7.What is the process for return or replacement of SST49LF016C-33-4C-NHE?
All SST49LF016C-33-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST49LF016C-33-4C-NHE, 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 part is unused and in its original packaging.
Return procedure for SST49LF016C-33-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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