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Microchip Technology SST39LF512-45-4C-WHE
- Part No.:
- SST39LF512-45-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39LF512-45-4C-WHE.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
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Product details
Overview
SST39LF512-45-4C-WHE from Microchip Technology (formerly Silicon Storage Technology) is a 4 Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC with single 3.0–3.6 V supply, 45 ns read access time, and JEDEC-standard x8 parallel interface. It implements SuperFlash® split-gate technology for high reliability in embedded firmware storage, BIOS/UEFI code retention, and configuration data logging in industrial control systems.
For engineers reviewing the SST39LF512-45-4C-WHE datasheet, SST39LF512-45-4C-WHE pinout, SST39LF512-45-4C-WHE application, or SST39LF512-45-4C-WHE equivalent, key selection criteria include its 45 ns read timing, 4 KByte uniform sector erase architecture, 100,000-cycle endurance, 100-year data retention, and compatibility with standard 32-pin PLCC or TSOP footprints.
Technical Context
This device belongs to the SST39LF/VF family of parallel-interface flash memories using proprietary SuperFlash® technology - featuring a split-gate cell and thick-oxide tunneling injector to achieve fixed erase/program times independent of cycle count. It supports byte-program, sector-erase (4 KByte), and chip-erase operations via JEDEC-compliant command sequences.
Operation relies on three control signals (CE#, OE#, WE#) and latched address/data buses. Write status detection uses Data# Polling (DQ7) and Toggle Bit (DQ6); hardware protections include VDD power-up/down detection and noise/glitch immunity (<5 ns pulse rejection). The device exits reset in read mode and requires no external VPP.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - provides sufficient space for full BIOS images or multi-region firmware partitions in legacy x86 and microcontroller-based systems. |
| Read Access Time | 45 ns - enables direct connection to 22 MHz ISA bus or similar legacy microprocessor address/data buses without wait states. |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic rails; eliminates need for level shifters in 3.3 V system designs. |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over product lifetime in industrial controllers and medical devices. |
| Data Retention | >100 years - ensures long-term integrity of boot code and calibration data without refresh or backup power. |
| Sector Size | Uniform 4 KByte sectors - simplifies firmware update partitioning and enables atomic sector-level reprogramming without full chip erase. |
| Standby Current | 1 µA typical - minimizes quiescent power draw in battery-backed or energy-sensitive applications. |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier) or 32-lead TSOP (8 mm × 14 mm), RoHS compliant. Both packages conform to JEDEC standard x8 flash pinouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A15 select byte location; A16–A17 used for sector/block addressing during erase commands per JEDEC protocol. |
| DQ0–DQ7 | Data Input/Output | Bi-directional 8-bit data bus; tri-stated when CE# or OE# is high; supports latched byte-program and polling status reads. |
| CE# | Chip Enable | Active-low chip select; device enters standby (1 µA) when high; required low for all write and read operations. |
| OE# | Output Enable | Active-low output gate; controls DQ bus drive; high impedance when asserted high during writes or standby. |
| WE# | Write Enable | Active-low write control; initiates byte-program, sector-erase, and chip-erase command sequences with CE#. |
| VDD | Power Supply | 3.0–3.6 V supply; internal charge pump generates programming voltage - no external VPP required. |
| VSS | Ground | Reference ground for all I/O and core logic; must be low-impedance connection for reliable erase/write timing. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell architecture delivers fixed 18 ms sector-erase and 70 ms chip-erase times - no software de-rating needed over lifetime. |
| Software Data Protection | Three-byte (program) or six-byte (erase) JEDEC-compliant command sequences prevent accidental writes during power transitions. |
| End-of-Write Detection | DQ6 (Toggle Bit) and DQ7 (Data# Polling) provide deterministic, software-readable status - eliminates need for fixed delay timers. |
| Hardware Write Inhibit | Automatic lockout when VDD < 1.5 V or WE#/CE#/OE# pulses < 5 ns - prevents corruption during brown-out or EMI events. |
| JEDEC Pinout Compliance | Direct drop-in replacement for industry-standard 32-pin x8 flash devices - supports existing PCB layouts and socket tooling. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS/UEFI Code |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with 45 ns read access enabling real-time instruction fetch from microcontroller bus. Use Value: 100,000-cycle endurance allows quarterly firmware patches over 10+ years; 100-year retention avoids recalibration drift in unattended deployments. |
Use Scenario: Holding boot firmware in legacy desktop/server motherboards using ISA/LPC interfaces and 3.3 V power domains. IC Role / Device Role / Timing Role: Parallel x8 flash memory mapped into CPU address space for fast POST execution and option ROM loading. Use Value: JEDEC pin compatibility permits direct substitution for obsolete AMI/Winbond parts; 4 KByte sectors enable modular BIOS update without full chip erase. |
| Medical Device Configuration Memory | Telecom Line Card Boot Image |
Use Scenario: Retaining calibration tables, user preferences, and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power (1 µA standby) nonvolatile storage accessed only during initialization or service mode. Use Value: >100-year data retention meets FDA long-term traceability requirements; hardware write inhibit prevents corruption during battery swaps. |
Use Scenario: Hosting boot loader and FPGA configuration bitstreams on carrier-grade telecom line cards requiring hot-swap capability. IC Role / Device Role / Timing Role: Primary boot memory interfaced to ARM or PowerPC processors via local bus with minimal glue logic. Use Value: Uniform 4 KByte sectors allow atomic field upgrades of individual card functions; SuperFlash® fixed timing ensures predictable boot duration across lifecycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-interface flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-90EC | 45 ns read access vs. 90 ns; 3.0–3.6 V supply same; 4 KByte sectors; JEDEC-compatible but different command set (AMD-style vs. SST's SuperFlash). | Requires firmware driver modification due to distinct unlock-bypass and status register protocols. | Select if AMD ecosystem support exists and 45 ns timing is not critical; verify command sequence compatibility in bootloader. |
| MX29LV040CTTI-70G | 70 ns read access; 2.7–3.6 V supply range wider; same 4 KByte sector size; identical JEDEC pinout and command set (SST-compatible). | Lower minimum VDD enables operation in brown-out conditions where SST39LF512-45-4C-WHE would suspend. | Preferred for 2.7 V–3.6 V systems needing guaranteed operation at 2.7 V; retains full software compatibility. |
Compared with AM29LV040B-90EC and MX29LV040CTTI-70G, the SST39LF512-45-4C-WHE delivers the fastest read timing (45 ns) and most consistent erase/program performance across temperature and wear - making it optimal for latency-sensitive boot paths and high-reliability industrial firmware storage.
Availability
SST39LF512-45-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS/UEFI code, and medical device configuration memory requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF512-45-4C-WHE 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 continues to manufacture and support the SST39LF/VF family of parallel flash memories.
The SST39LF series was designed specifically for cost-sensitive, high-reliability embedded applications requiring fast read access, robust write protection, and long data retention - targeting industrial control, computing, and communications infrastructure.
FAQ
What is the maximum operating frequency supported by SST39LF512-45-4C-WHE?
The SST39LF512-45-4C-WHE does not operate at a clock frequency - it is an asynchronous parallel flash memory. Its 45 ns read access time corresponds to a maximum effective interface speed of approximately 22 MHz when interfaced with a microprocessor bus without wait states. Timing is governed by CE#, OE#, and address setup/hold requirements per Table 12 in the datasheet.
Does SST39LF512-45-4C-WHE require an external VPP voltage for programming?
No. The SST39LF512-45-4C-WHE integrates an internal charge pump that generates the high voltage required for programming and erasing. Only a single 3.0–3.6 V supply (VDD) is needed - eliminating external VPP circuitry and reducing board complexity and cost.
How many sectors does SST39LF512-45-4C-WHE contain, and what is their size?
The SST39LF512-45-4C-WHE contains 128 uniform 4 KByte sectors, totaling 512 KBytes (4 Mbit). Each sector can be erased independently using the six-byte sector-erase command sequence, enabling granular firmware updates without affecting other memory regions.
Is SST39LF512-45-4C-WHE compatible with 32-pin TSOP-II footprint?
Yes. The SST39LF512-45-4C-WHE is offered in both 32-lead PLCC and 32-lead TSOP (8 mm × 14 mm) packages. The TSOP variant matches standard TSOP-II mechanical dimensions and JEDEC pinout - allowing direct PCB footprint reuse where thermal and height constraints permit.
What happens if power is interrupted during a sector-erase operation on SST39LF512-45-4C-WHE?
The SST39LF512-45-4C-WHE includes hardware write-inhibit circuitry that disables programming when VDD drops below 1.5 V. If power fails mid-erase, the device halts the operation and retains valid data in unaffected sectors. No sector is left in an undefined state - partial erase is not possible due to the command-sequence architecture and internal state machine validation.
SST39LF512-45-4C-WHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 45 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39LF512-45-4C-WHE FAQ
1.How can I place an order for SST39LF512-45-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF512-45-4C-WHE 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 SST39LF512-45-4C-WHE reliable?
The price and inventory of SST39LF512-45-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF512-45-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39LF512-45-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF512-45-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF512-45-4C-WHE?
SST39LF512-45-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF512-45-4C-WHE 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 SST39LF512-45-4C-WHE?
For technical support, including SST39LF512-45-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF512-45-4C-WHE requirements.
6.How does Aetrix verify that SST39LF512-45-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39LF512-45-4C-WHE 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 SST39LF512-45-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39LF512-45-4C-WHE?
All SST39LF512-45-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF512-45-4C-WHE, 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 SST39LF512-45-4C-WHE part is unused and in its original packaging.
Return procedure for SST39LF512-45-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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