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Microchip Technology SST39VF020-70-4I-NHE
- Part No.:
- SST39VF020-70-4I-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39VF020-70-4I-NHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:107
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Product details
Overview
SST39VF020-70-4I-NHE from Microchip Technology is a 2-Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with 2.7V–3.6V single-supply write operation, 70 ns read access time, and uniform 4-Kbyte sector erase architecture. It implements SuperFlash® technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39VF020-70-4I-NHE datasheet, SST39VF020-70-4I-NHE pinout, SST39VF020-70-4I-NHE application, or SST39VF020-70-4I-NHE equivalent, key selection criteria include its industrial temperature range (–40°C to +85°C), JEDEC-standard x8 flash command set, 100,000-cycle endurance, and compatibility with 32-lead PLCC/TSOP footprints in legacy microcontroller systems.
Technical Context
This device belongs to Microchip's SST39VF family of parallel-interface flash memories using split-gate SuperFlash® cells. Its architecture supports byte-level programming and sector-based erasure via standard microprocessor bus cycles, with internal VPP generation eliminating external high-voltage circuitry.
Write status detection relies on two hardware-supported methods-Data# Polling (DQ7) and Toggle Bit (DQ6)-both valid after the fourth (program) or sixth (erase) WE#/CE# pulse. The device conforms to JEDEC-standard pinouts and command sequences, enabling drop-in replacement in existing x8 flash designs without protocol changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly maps to 256 KB of addressable storage space |
| Read Access Time | 70 ns maximum - determines minimum CPU wait-state requirement for zero-wait-state operation at ≤14 MHz |
| Supply Voltage Range | 2.7V–3.6V - enables direct interface with 3.3V logic and battery-backed systems down to 2.7V |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates over product lifetime |
| Data Retention | Greater than 100 years - ensures long-term validity of stored boot code or calibration data |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and automotive body electronics |
| Standby Current | 1 µA typical - minimizes power draw in sleep-mode systems such as remote sensors |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier) and 32-lead TSOP (Thin Small Outline Package), both with standard JEDEC x8 flash pinout. Pin 1 is NC for SST39VF020; pin 30 is NC in PLCC variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for byte addressing; A17 selects upper/lower half of 256K array (AMS = A17) |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; outputs tri-stated when CE# or OE# is high |
| CE# | Chip Enable | Active-low chip select; must be low for any read/write operation |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read only |
| WE# | Write Enable | Active-low write strobe; latches address/data and initiates internal program/erase timing |
| VDD | Power Supply | 2.7V–3.6V supply; powers core logic and SuperFlash® cell programming circuitry |
| VSS | Ground | Reference return path for all digital and analog functions |
| NC | No Connection | Pins 1 and 30 (PLCC), pins 6 and 9 (TSOP) are unconnected per device variant |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 20 µs byte-program and 18 ms sector-erase times independent of wear level - eliminates software derating over lifetime |
| Uniform 4-Kbyte Sectors | 64 independent erasable blocks enable granular firmware updates without full-chip erase overhead |
| Hardware + Software Data Protection | Glitch-resistant WE#/CE# inputs plus six-byte SDP command sequence prevent spurious writes during power transitions |
| JEDEC x8 Standard Compliance | Pin-compatible and command-set-compatible with industry-standard parallel flash devices - simplifies BOM consolidation |
| CMOS I/O Compatibility | Direct interface with 3.3V microcontrollers and FPGAs without level-shifting circuitry |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing and updating ladder logic programs and I/O configuration tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability via RS-232 or CAN bootloader. Use Value: Enables field firmware patches without hardware replacement; 100-year data retention ensures integrity across multi-decade equipment lifecycles. | Use Scenario: Holding vehicle-specific calibration data, door lock logic, and lighting control algorithms in automotive body domain controllers. IC Role / Device Role / Timing Role: Boot-time configuration memory accessed by MCU during power-on initialization. Use Value: Industrial temperature rating (–40°C to +85°C) guarantees reliable operation under hood thermal stress; 2.7V min VDD supports cold-cranking scenarios. |
| Medical Diagnostic Equipment BIOS | Network Router Bootloader Storage |
Use Scenario: Storing secure boot firmware and regulatory-compliant diagnostic self-test routines in FDA-cleared imaging devices. IC Role / Device Role / Timing Role: Trusted execution environment (TEE) root-of-trust storage for cryptographic keys and signed firmware images. Use Value: Hardware write-inhibit modes and software data protection prevent unauthorized firmware modification - critical for regulatory audit trails. | Use Scenario: Hosting U-Boot or similar open-source bootloader firmware in enterprise-grade Ethernet switches and wireless access points. IC Role / Device Role / Timing Role: Primary boot memory mapped into CPU address space at reset vector location. Use Value: 70 ns read access enables fast boot times; sector erase allows incremental bootloader updates without disrupting running network services. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020 | 2-Mbit parallel flash with 5V/3.3V dual-voltage support; 90 ns read access; no SuperFlash® fixed-timing guarantee | Requires external VPP for programming; less robust against voltage transients during erase | Choose AT29LV020 only if 5V system compatibility is required and tighter timing budgets are acceptable |
| SST39VF020-70-4C-NHE | Identical silicon and pinout; differs only in temperature grade (0°C to +70°C commercial vs. –40°C to +85°C industrial) | Not rated for extended temperature operation; unsuitable for under-hood or outdoor deployments | Select SST39VF020-70-4C-NHE only for cost-sensitive consumer applications with controlled ambient conditions |
Compared with AT29LV020 and SST39VF020-70-4C-NHE, the SST39VF020-70-4I-NHE delivers guaranteed industrial temperature operation, fixed SuperFlash® timing unaffected by wear, and lower 2.7V minimum VDD - making it optimal for mission-critical embedded systems where reliability and voltage margin are design priorities.
Availability
SST39VF020-70-4I-NHE is available at Aetrix Electronics and suitable for industrial control systems, automotive body electronics, medical diagnostics equipment, and network infrastructure requiring stable component supply across extended product lifecycles.
Supply support for SST39VF020-70-4I-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 Inc. is a leading provider of microcontroller, analog, FPGA, and memory solutions, serving industrial, automotive, communications, and consumer markets with vertically integrated semiconductor products.
The SST39VF series was designed specifically for cost-effective, high-reliability parallel flash replacement in legacy 8-bit and 16-bit microcontroller systems requiring field-upgradable firmware and configuration storage.
FAQ
What is the memory organization of the SST39VF020-70-4I-NHE?
The SST39VF020-70-4I-NHE is organized as 256K × 8, providing 2,097,152 bits (2 Mbit) of addressable storage space. This corresponds to 256 KB of contiguous byte-addressable memory, with A0–A16 used for byte addressing and A17 serving as the most significant address bit (AMS) for sector/block selection during erase operations.
Does the SST39VF020-70-4I-NHE require an external high-voltage supply for programming?
No, the SST39VF020-70-4I-NHE does not require an external high-voltage supply. It uses internal VPP generation enabled by its SuperFlash® technology, allowing full byte-program and sector-erase functionality using only the 2.7V–3.6V VDD supply. This eliminates the need for charge pumps or external 12V circuitry commonly found in older flash architectures.
How is write completion detected on the SST39VF020-70-4I-NHE?
Write completion on the SST39VF020-70-4I-NHE is detected using either Data# Polling (DQ7) or Toggle Bit (DQ6). After the fourth WE#/CE# pulse for programming or sixth pulse for erasing, DQ7 toggles between complement and true data, while DQ6 alternates between 0 and 1 until the operation completes. Both methods are supported in hardware and require no additional components.
What package options are available for the SST39VF020-70-4I-NHE?
The SST39VF020-70-4I-NHE is offered in two RoHS-compliant packages: 32-lead PLCC (Plastic Leaded Chip Carrier) and 32-lead TSOP (Thin Small Outline Package). Both share identical pinouts and electrical characteristics, differing only in mechanical form factor and thermal performance - PLCC offers better thermal dissipation, while TSOP enables higher board density.
Is the SST39VF020-70-4I-NHE compatible with JEDEC-standard flash command sets?
Yes, the SST39VF020-70-4I-NHE fully complies with JEDEC® standard pin assignments and command sets for x8 parallel flash memories. It supports standard commands including Byte Program (A0H), Sector Erase (30H), Chip Erase (10H), and Software ID Read (90H), ensuring interoperability with existing flash programming tools and bootloader firmware written for JEDEC-compliant devices.
SST39VF020-70-4I-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K 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)
SST39VF020-70-4I-NHE FAQ
1.How can I place an order for SST39VF020-70-4I-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF020-70-4I-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 SST39VF020-70-4I-NHE reliable?
The price and inventory of SST39VF020-70-4I-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF020-70-4I-NHE is usually 5 days.
3.What payment methods are accepted for SST39VF020-70-4I-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF020-70-4I-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF020-70-4I-NHE?
SST39VF020-70-4I-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF020-70-4I-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 SST39VF020-70-4I-NHE?
For technical support, including SST39VF020-70-4I-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF020-70-4I-NHE requirements.
6.How does Aetrix verify that SST39VF020-70-4I-NHE is sourced from the original manufacturer or authorized distributors?
All SST39VF020-70-4I-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 SST39VF020-70-4I-NHE meets industry standards.
7.What is the process for return or replacement of SST39VF020-70-4I-NHE?
All SST39VF020-70-4I-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF020-70-4I-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 SST39VF020-70-4I-NHE part is unused and in its original packaging.
Return procedure for SST39VF020-70-4I-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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