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Microchip Technology SST39VF512-70-4I-NHE
- Part No.:
- SST39VF512-70-4I-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39VF512-70-4I-NHE.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,755
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Product details
Overview
SST39VF512-70-4I-NHE from Microchip Technology (formerly Silicon Storage Technology) is a 512 Kbit (64K × 8) CMOS Multi-Purpose Flash memory IC with JEDEC-standard x8 parallel interface, 70 ns read access time, 2.7–3.6 V single-supply operation, and industrial temperature range (–40°C to +85°C). It delivers uniform 4 KByte sector erase, 100,000 program/erase cycles endurance, and >100 years data retention for embedded firmware storage in microcontroller-based systems.
For engineers reviewing the SST39VF512-70-4I-NHE datasheet, SST39VF512-70-4I-NHE pinout, SST39VF512-70-4I-NHE application, or SST39VF512-70-4I-NHE equivalent, this page provides verified technical context, JEDEC-compliant pin functions, real-world use cases in industrial control and legacy BIOS, and two validated alternative flash parts with documented functional and timing differences.
Technical Context
The SST39VF512-70-4I-NHE implements SuperFlash technology with split-gate cell architecture and thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports standard JEDEC command sets for byte-program, sector-erase (30H), and chip-erase (10H), all initiated via three- or six-byte software data protection sequences.
Operation relies on asynchronous control signals CE#, OE#, and WE# with latched address/data buses. End-of-write detection uses DQ7 Data# Polling and DQ6 Toggle Bit, both valid after the fourth (program) or sixth (erase) WE#/CE# edge. The device conforms to JEDEC-standard x8 pinouts and operates with CMOS-compatible I/O levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), directly maps to 64 KB of firmware or configuration space in 8-bit bus systems. |
| Read Access Time | 70 ns maximum - enables direct execution from flash (XIP) in systems with ≤14 MHz bus clocks. |
| Supply Voltage | 2.7–3.6 V - supports wide-input industrial power rails and battery-backed operation without external regulators. |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in deployed equipment. |
| Data Retention | Greater than 100 years at 25°C - ensures long-term reliability in unpowered storage applications. |
| Sector Size | Uniform 4 KByte sectors - allows granular firmware partitioning (e.g., bootloader, app, config) without full-chip erasure. |
| Operating Temp | –40°C to +85°C - qualified for industrial automation, motor drives, and outdoor embedded controllers. |
Pinout & Package
32-lead PLCC (Plastic Leaded Chip Carrier) package, RoHS compliant, with standard JEDEC x8 parallel memory pinout. Pin 1 index corner marked per JEDEC MO-118.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K address space; A12–A15 select 4 KByte sector during erase. |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus; tri-stated when CE# or OE# is high; latched internally during write. |
| CE# | Chip Enable | Active-low chip select; device enters standby (1 µA) when high; required low for all operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive; high = high-impedance state during reads. |
| WE# | Write Enable | Active-low write control; initiates byte-program or erase command latching on rising/falling edges. |
| VDD | Power Supply | 2.7–3.6 V supply; internal VPP generation eliminates need for external high-voltage programming source. |
| VSS | Ground | Reference ground for all I/O and core logic; must be low-impedance connection per JEDEC layout rules. |
| NC | No Connection | Pins 16, 17, 31, and 32 are unconnected; must remain floating or tied to VSS per PCB design guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 18 ms sector-erase and 70 ms chip-erase times across full lifecycle. |
| Software Data Protection | JEDEC-compliant 3-byte (program) and 6-byte (erase) command sequences prevent accidental writes during power transitions. |
| Hardware Write Inhibit | Automatic lockout when VDD < 1.5 V, plus noise immunity for WE#/CE# pulses < 5 ns - eliminates spurious writes in noisy environments. |
| End-of-Write Detection | DQ7 Data# Polling and DQ6 Toggle Bit provide deterministic status feedback without requiring external timers or polling delays. |
| Low Power Standby | 1 µA typical standby current at VDD max - critical for battery-powered or energy-harvesting systems with infrequent firmware access. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS/UEFI Module |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile code storage with XIP-capable 70 ns read access, enabling deterministic scan-cycle execution without RAM shadowing. Use Value: 100,000-cycle endurance supports field firmware updates over 15+ years; industrial temp rating ensures reliability at –40°C cold starts and +85°C cabinet operation. |
Use Scenario: Boot ROM replacement in legacy desktop/server motherboards where BIOS/UEFI code must persist across power cycles and support hot updates. IC Role / Device Role / Timing Role: JEDEC-standard x8 parallel interface directly replaces older 27Cxxx EPROMs and 28Fxxx flash parts in socketed BIOS designs. Use Value: 2.7–3.6 V operation matches modern ATX 3.3 V rail; 4 KByte sector erase allows safe partial updates without corrupting boot vectors. |
| Medical Device Configuration Memory | Automotive Body Control Module (BCM) |
Use Scenario: Storing calibration data, user preferences, and safety-critical device parameters in portable diagnostic equipment requiring FDA-grade data integrity. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage with >100-year data retention and hardware/software write protection to prevent unauthorized parameter changes. Use Value: RoHS-compliant PLCC package supports lead-free reflow; 1 µA standby current extends battery life in handheld units between calibrations. |
Use Scenario: Storing lighting control logic, window/mirror position maps, and fault logs in automotive BCMs exposed to under-hood thermal cycling. IC Role / Device Role / Timing Role: Industrial-grade flash with –40°C to +85°C operation and robust ESD tolerance (per JEDEC JESD22-A114) for harsh vehicle environments. Use Value: Uniform 4 KByte sectors enable isolated update of lighting profiles without disturbing door-lock firmware; SuperFlash fixed timing avoids software de-rating over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV512CTI-70G | 70 ns read, 3.0–3.6 V supply, 512 Kbit density, but requires 12 V VPP for programming - no internal charge pump. | Not suitable for single-supply 2.7 V systems; requires external high-voltage circuitry and additional PCB area. | Select only if legacy system already includes 12 V programming rail and board space for discrete VPP generation. |
| EN29LV512A-70HIP | 70 ns read, 2.7–3.6 V, same density and industrial temp, but uses different command set (AMD-style vs JEDEC). | Requires firmware driver modification; not drop-in compatible due to incompatible sector-erase and chip-erase opcodes. | Choose only when migrating existing AMD-based codebase and redesigning flash initialization routines. |
Compared with MX29LV512CTI-70G and EN29LV512A-70HIP, the SST39VF512-70-4I-NHE offers true single-supply operation with integrated VPP generation and JEDEC-standard command compatibility - reducing BOM cost, simplifying layout, and accelerating firmware integration for new industrial designs.
Availability
SST39VF512-70-4I-NHE is available at Aetrix Electronics and suitable for industrial control systems, legacy BIOS modules, medical device configuration storage, and automotive body control applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39VF512-70-4I-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 acquired Silicon Storage Technology (SST) in 2016 and now manufactures and supports the SST39VF family as part of its broad portfolio of legacy-compatible nonvolatile memory solutions.
The SST39VF series was designed specifically for cost-sensitive, industrial-grade embedded systems requiring reliable parallel NOR flash with JEDEC pin and command compatibility - targeting firmware, BIOS, and configuration storage in resource-constrained environments.
FAQ
What is the exact memory organization of the SST39VF512-70-4I-NHE?
The SST39VF512-70-4I-NHE is organized as 64K × 8 bits (512 Kbit total), providing a linear 64 KB address space accessible via 16 address lines (A0–A15). This matches JEDEC-standard x8 parallel flash architecture and enables direct mapping to 8-bit microcontroller data buses without address translation logic. The SST39VF512-70-4I-NHE supports uniform 4 KByte sector erase across all 16 sectors.
Does the SST39VF512-70-4I-NHE require an external VPP voltage for programming?
No. The SST39VF512-70-4I-NHE integrates an internal charge pump that generates the high voltage required for programming and erasing, eliminating the need for an external 12 V VPP supply. It operates from a single 2.7–3.6 V VDD rail for both read and write operations - a key advantage over older AMD-style or Intel-style flash devices. This simplifies power design and reduces system BOM cost. The SST39VF512-70-4I-NHE leverages SuperFlash technology to achieve this capability.
How does the SST39VF512-70-4I-NHE indicate completion of a byte-program operation?
The SST39VF512-70-4I-NHE provides two hardware-supported methods: Data# Polling (DQ7) and Toggle Bit (DQ6). During programming, DQ7 outputs the complement of the true data until completion, then returns the correct value; DQ6 toggles between 0 and 1 until the operation finishes, then holds steady. Both are valid after the rising edge of the fourth WE# or CE# pulse. These mechanisms allow host firmware to poll asynchronously without fixed delay loops. The SST39VF512-70-4I-NHE guarantees deterministic status reporting per JEDEC standard.
Is the SST39VF512-70-4I-NHE pin-compatible with the SST39VF040 series?
No. Although both belong to the SST39VF family and share the same 32-pin PLCC package and JEDEC x8 pinout, the SST39VF512-70-4I-NHE is a 512 Kbit (64K × 8) device requiring only A0–A15, while the SST39VF040 is a 4 Mbit (512K × 8) device using A0–A18. Address lines A16–A18 are NC on the SST39VF512-70-4I-NHE but active on SST39VF040. Direct substitution would cause incorrect addressing beyond 64 KB. The SST39VF512-70-4I-NHE is functionally and physically distinct from higher-density variants.
What is the maximum allowable capacitive load on the DQ pins of the SST39VF512-70-4I-NHE?
The SST39VF512-70-4I-NHE specifies a maximum output load capacitance of 100 pF for AC timing compliance, as defined in Table 7 of the datasheet. This value ensures guaranteed 70 ns read access time under worst-case conditions. Exceeding 100 pF may degrade timing margins, increase signal rise/fall times, and risk setup/hold violations in high-speed bus interfaces. Layout best practices include minimizing trace length, avoiding stubs, and using series termination if driving multiple loads. The SST39VF512-70-4I-NHE's output drivers are rated for CL = 100 pF.
SST39VF512-70-4I-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39VF512-70-4I-NHE FAQ
1.How can I place an order for SST39VF512-70-4I-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF512-70-4I-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 SST39VF512-70-4I-NHE reliable?
The price and inventory of SST39VF512-70-4I-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF512-70-4I-NHE is usually 5 days.
3.What payment methods are accepted for SST39VF512-70-4I-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF512-70-4I-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF512-70-4I-NHE?
SST39VF512-70-4I-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF512-70-4I-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 SST39VF512-70-4I-NHE?
For technical support, including SST39VF512-70-4I-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF512-70-4I-NHE requirements.
6.How does Aetrix verify that SST39VF512-70-4I-NHE is sourced from the original manufacturer or authorized distributors?
All SST39VF512-70-4I-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 SST39VF512-70-4I-NHE meets industry standards.
7.What is the process for return or replacement of SST39VF512-70-4I-NHE?
All SST39VF512-70-4I-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF512-70-4I-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 SST39VF512-70-4I-NHE part is unused and in its original packaging.
Return procedure for SST39VF512-70-4I-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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