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Microchip Technology SST39VF512-70-4I-WHE
- Part No.:
- SST39VF512-70-4I-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39VF512-70-4I-WHE.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,084
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Product details
Overview
SST39VF512-70-4I-WHE 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 byte-program capability in 14 µs typical, sector-erase in 18 ms typical, and >100 years data retention - deployed in firmware storage for embedded controllers and boot code in industrial HMIs.
For engineers reviewing the SST39VF512-70-4I-WHE datasheet, SST39VF512-70-4I-WHE pinout, SST39VF512-70-4I-WHE application, or SST39VF512-70-4I-WHE equivalent, key selection criteria include its 32-pin TSOP (8 mm × 14 mm) package, uniform 4 KB sector architecture, hardware/software data protection, toggle-bit and data# polling status detection, and compatibility with legacy 8-bit microcontroller buses requiring nonvolatile program storage.
Technical Context
This device implements SST's proprietary SuperFlash technology with split-gate cell design and thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count - eliminating software de-rating over lifetime. It operates as a JEDEC-compliant x8 parallel flash, using standard CE#, OE#, and WE# control signals with latched address/data bus and tri-state outputs.
The SST39VF512-70-4I-WHE supports three primary operations: Read (CE#/OE# low), Byte-Program (via 3-byte unlock sequence followed by address/data), and Sector-Erase (6-byte command with sector address). End-of-write detection uses DQ6 (Toggle Bit) and DQ7 (Data# Polling), both valid after the fourth (program) or sixth (erase) WE# pulse edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8) - provides sufficient space for bootloader, configuration tables, and firmware patches in resource-constrained 8-bit systems. |
| Read Access Time | 70 ns max - enables direct execution from flash (XIP) on MCUs with ≤14 MHz bus timing without wait states. |
| Supply Voltage | 2.7–3.6 V - supports wide-input industrial power rails and battery-backed operation down to 2.7 V without external regulators. |
| Endurance | 100,000 program/erase cycles typical - ensures reliable field updates over 10+ years in telemetry and control applications. |
| Data Retention | >100 years at 85°C - guarantees long-term integrity of calibration data and security keys in unattended deployments. |
| Sector Size | Uniform 4 KB sectors - simplifies firmware partitioning and enables atomic update of functional modules without full chip erase. |
| Standby Current | 1 µA typical - minimizes quiescent power in always-on industrial sensors and remote I/O nodes. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS compliant, standard JEDEC x8 pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A12–A15 select 4 KB sector during erase. |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus; DQ6 = Toggle Bit, DQ7 = Data# Polling for write status monitoring. |
| CE# | Chip Enable | Active-low chip select; must be low for read/write access; high-Z output when asserted high. |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read; independent of CE# for flexible timing. |
| WE# | Write Enable | Active-low write strobe; latches address/data and initiates internal program/erase sequences. |
| VDD | Power Supply | 2.7–3.6 V supply; internally generates VPP for programming - no external high-voltage source required. |
| VSS | Ground | Reference ground for all I/O and core logic; decoupling capacitor placement critical for noise immunity. |
| NC | No Connection | Pins 16 and 31 are unconnected; must remain floating per datasheet - not tied to VDD/VSS. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with fixed 14 µs byte-program and 18 ms sector-erase times - eliminates performance degradation over lifetime. |
| Hardware + Software Data Protection | Glitch-resistant WE#/CE# filtering, VDD power-up/down detection, and mandatory 3-byte unlock sequence prevents accidental writes. |
| JEDEC x8 Standard Interface | Pin- and command-set compatible with industry-standard parallel flash devices - enables drop-in replacement in existing designs. |
| Industrial Temperature Range | –40°C to +85°C operation with guaranteed 2.7–3.6 V supply - qualified for use in motor drives, PLCs, and outdoor metering. |
| Status Detection Methods | DQ6 Toggle Bit and DQ7 Data# Polling provide real-time, software-readable completion signals - no external polling timer needed. |
Applications
| Industrial HMI Firmware Storage | Embedded Controller Bootloader |
|---|---|
|
Use Scenario: Storing GUI assets, language packs, and firmware images in panel-mounted HMIs exposed to vibration and thermal cycling. IC Role / Device Role: Nonvolatile program memory mapped directly to MCU address space for XIP execution. Use Value: 70 ns read speed enables responsive UI rendering; 100,000-cycle endurance supports over-the-air firmware updates in field-deployed units. |
Use Scenario: Holding secure boot code and hardware initialization routines in programmable logic controllers (PLCs). IC Role / Device Role: Primary boot memory accessed at power-on reset via 8-bit parallel bus. Use Value: Industrial temperature rating and >100-year data retention ensure reliable cold-start operation across decades of service life. |
| Smart Sensor Configuration Memory | Legacy Industrial Communication Module |
|
Use Scenario: Storing calibrated sensor coefficients, device IDs, and communication parameters in wireless temperature transmitters. IC Role / Device Role: Configuration EEPROM replacement with faster write and higher endurance. Use Value: 4 KB uniform sectors allow atomic reprogramming of calibration data without erasing operational firmware. |
Use Scenario: Replacing obsolete EPROMs in Modbus RTU gateways and RS-485 protocol converters. IC Role / Device Role: Pin-compatible JEDEC x8 flash providing in-system reprogrammability. Use Value: 2.7–3.6 V operation matches legacy 3.3 V or 5 V–regulated industrial power supplies via level-shifting buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV512-70PU | 512 Kbit, 70 ns, 3.0–3.6 V only; lacks 2.7 V lower limit and industrial temp grade. | Restricted to commercial-temp (0°C to +70°C) environments; unsuitable for outdoor or motor-control enclosures. | Select only if system VDD is tightly regulated ≥3.0 V and ambient stays within 0–70°C. |
| MX29LV512CTTI-70G | 512 Kbit, 70 ns, 2.7–3.6 V, industrial temp; requires different unlock sequence (60H/05H vs SST's 5555H/2AAAH/A0H). | Command set incompatibility demands firmware modification; no toggle-bit support - relies solely on polling. | Choose when migrating legacy designs to Macronix platform and redesigning driver software is feasible. |
Compared with AT29LV512-70PU and MX29LV512CTTI-70G, the SST39VF512-70-4I-WHE uniquely combines true 2.7 V minimum operation, industrial temperature qualification, and native toggle-bit status reporting - reducing firmware complexity and broadening deployment scope without layout changes.
Availability
SST39VF512-70-4I-WHE is available at Aetrix Electronics and suitable for industrial HMI firmware storage, embedded controller bootloader, smart sensor configuration memory, and legacy industrial communication module applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39VF512-70-4I-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 SST39VF family as part of its broad serial and parallel flash portfolio.
The SST39VF series was designed specifically for cost-sensitive, high-reliability embedded systems requiring simple, JEDEC-standard parallel flash with robust data retention and industrial-grade operation - targeting industrial automation, medical diagnostics, and automotive subsystems.
FAQ
What is the operating voltage range for the SST39VF512-70-4I-WHE?
The SST39VF512-70-4I-WHE operates from 2.7 V to 3.6 V over its full industrial temperature range (–40°C to +85°C). This wide supply window allows direct interfacing with 3.3 V systems and tolerance for brown-out conditions, unlike narrower-range alternatives such as the AT29LV512 which requires ≥3.0 V. The SST39VF512-70-4I-WHE internally generates programming voltage - no external VPP supply is needed.
Does the SST39VF512-70-4I-WHE support sector-erase functionality?
Yes, the SST39VF512-70-4I-WHE supports uniform 4 KB sector-erase using a six-byte software command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SAX/30H). Each sector can be erased independently, enabling modular firmware updates without full chip erase. The SST39VF512-70-4I-WHE datasheet specifies 18 ms typical sector-erase time and confirms compatibility with JEDEC-standard sector architecture.
How is write completion detected on the SST39VF512-70-4I-WHE?
Write completion on the SST39VF512-70-4I-WHE is detected using two hardware-supported methods: DQ6 Toggle Bit (alternating 0/1 during operation, stops when complete) and DQ7 Data# Polling (complement of data during write, returns true value at completion). Both are valid after the fourth WE# pulse for programming and sixth for erasing. The SST39VF512-70-4I-WHE does not require external timers or status registers - detection is fully pin-level and software-transparent.
What package type is used for the SST39VF512-70-4I-WHE?
The SST39VF512-70-4I-WHE is supplied in a 32-lead TSOP (Thin Small Outline Package) measuring 8 mm × 14 mm, with standard JEDEC x8 pinout. It is RoHS compliant and rated for surface-mount reflow up to 260°C for 10 seconds. This package replaces older PLCC variants while maintaining pin compatibility - no PCB redesign is required when upgrading from SST39VF512-70-4C-WHE or similar TSOP versions.
Is the SST39VF512-70-4I-WHE compatible with legacy 8-bit microcontrollers?
Yes, the SST39VF512-70-4I-WHE is fully compatible with legacy 8-bit microcontrollers (e.g., 8051, PIC18, Z80 derivatives) via its standard JEDEC x8 parallel interface. It uses asynchronous CE#, OE#, and WE# control signals, latched address/data bus, and tri-state outputs - matching timing and electrical requirements of classic bus architectures. The SST39VF512-70-4I-WHE requires no glue logic or voltage translation when interfaced to 3.3 V or 5 V–tolerant MCU buses.
SST39VF512-70-4I-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:
- 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-TSOP
SST39VF512-70-4I-WHE FAQ
1.How can I place an order for SST39VF512-70-4I-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF512-70-4I-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 SST39VF512-70-4I-WHE reliable?
The price and inventory of SST39VF512-70-4I-WHE 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-WHE is usually 5 days.
3.What payment methods are accepted for SST39VF512-70-4I-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF512-70-4I-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF512-70-4I-WHE?
SST39VF512-70-4I-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF512-70-4I-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 SST39VF512-70-4I-WHE?
For technical support, including SST39VF512-70-4I-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF512-70-4I-WHE requirements.
6.How does Aetrix verify that SST39VF512-70-4I-WHE is sourced from the original manufacturer or authorized distributors?
All SST39VF512-70-4I-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 SST39VF512-70-4I-WHE meets industry standards.
7.What is the process for return or replacement of SST39VF512-70-4I-WHE?
All SST39VF512-70-4I-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF512-70-4I-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 SST39VF512-70-4I-WHE part is unused and in its original packaging.
Return procedure for SST39VF512-70-4I-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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