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Microchip Technology SST39VF020-70-4I-NHE-T
- Part No.:
- SST39VF020-70-4I-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39VF020-70-4I-NHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,655
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Product details
Overview
SST39VF020-70-4I-NHE-T 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 and low-energy programming, and is used in embedded firmware storage, BIOS/UEFI code retention, and industrial controller configuration memory.
For engineers reviewing the SST39VF020-70-4I-NHE-T datasheet, SST39VF020-70-4I-NHE-T pinout, SST39VF020-70-4I-NHE-T application, or SST39VF020-70-4I-NHE-T equivalent, key selection criteria include its 2.7V minimum VDD, industrial temperature range (–40°C to +85°C), JEDEC-standard x8 interface, and hardware/software data protection schemes.
Technical Context
This device uses Microchip's proprietary SuperFlash® split-gate cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional Flash technologies where timing degrades over endurance life. Its control logic supports standard microprocessor bus interfacing via CE#, OE#, and WE# with latched address/data paths.
It implements JEDEC-standard command sets for byte program, sector erase (30H), chip erase (10H), and software product identification (90H), all initiated via three- or six-byte sequences with address-based unlocking at 5555H/2AAAH. End-of-write detection is provided via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after defined WE#/CE# edge counts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly maps to 256 KB of byte-addressable nonvolatile storage |
| Read Access Time | 70 ns maximum - determines minimum bus cycle time for reliable read operations at full speed |
| Supply Voltage Range | 2.7V–3.6V - enables compatibility with 3.3V systems and brown-out tolerant operation down to 2.7V |
| Endurance | 10,000 cycles minimum per sector - defines guaranteed reprogrammability before wear-out failure |
| Data Retention | 100 years minimum - ensures long-term firmware integrity without refresh in powered-off state |
| Active Current | 20 mA max at 70 ns read - constrains peak power draw during active fetches in battery-sensitive designs |
| Standby Current | 15 µA max - enables ultra-low-power hold mode during system sleep states |
Pinout & Package
32-lead PLCC (Plastic Leaded Chip Carrier) and 32-lead TSOP (Thin Small Outline Package) options; both share identical pin functions and JEDEC-standard x8 memory pinout. The NHE-T suffix indicates 32-lead TSOP package with industrial temperature grade (–40°C to +85°C) and lead-free (RoHS-compliant) finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | A0–A16 select 256K bytes; A17 is AMS (most significant address) and must be driven for sector erase addressing |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; outputs tri-state when CE# or OE# high; DQ6 = Toggle Bit, DQ7 = Data# Polling |
| CE# | Chip Enable | Active-low chip select; device enters standby (15 µA) when high; required low for all write/read operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive; high disables outputs to prevent bus contention |
| WE# | Write Enable | Active-low write strobe; initiates byte program, sector erase, and chip erase command sequences |
| VDD | Power Supply | 2.7V–3.6V supply; internal VPP generation eliminates need for external high-voltage programming supply |
| VSS | Ground | Reference return path for all signals and power; decoupling capacitor required near VDD/VSS pins |
| NC | No Connection | Pins 6 and 9 are NC for SST39VF020; must remain unconnected to avoid functional disruption |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 14 µs byte program and 18 ms sector erase times - eliminates software derating and timing margin expansion over lifetime |
| Uniform 4-Kbyte Sectors | 64 independent erasable sectors - enables granular firmware updates without full-chip erase latency |
| Hardware + Software Protection | Glitch immunity (<5 ns), VDD power-up detection, and JEDEC-standard 3-/6-byte unlock sequences - prevents accidental writes during reset or noise events |
| CMOS I/O Compatibility | VIH = 0.7VDD, VIL = 0.8V - ensures interoperability with standard 3.3V microcontrollers and FPGAs without level shifters |
| JEDEC Standard Compliance | Pinout and command set match industry-standard x8 Flash memories - simplifies drop-in replacement and design reuse |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial interface while maintaining operation-critical reliability. IC Role / Device Role / Timing Role: Nonvolatile code storage with 70 ns read access supporting real-time instruction fetch from microcontroller bus. Use Value: 100-year data retention and 10,000-cycle endurance ensure firmware integrity across 15+ year product lifecycles without degradation. | Use Scenario: Holding calibrated sensor offsets and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration memory accessed only during boot or maintenance mode. Use Value: 2.7V minimum VDD and 15 µA standby current enable reliable operation during battery-backed power loss events. |
| Automotive Infotainment Bootloader | Networking Equipment BIOS Storage |
Use Scenario: Hosting bootloader code in automotive head units requiring AEC-Q100 alignment and extended temperature operation. IC Role / Device Role / Timing Role: Primary boot memory mapped into MCU address space, accessed at power-on reset. Use Value: Industrial temperature grade (–40°C to +85°C) and RoHS compliance meet automotive environmental and regulatory requirements. | Use Scenario: Storing UEFI/BIOS images in enterprise switches and routers where firmware integrity impacts network uptime. IC Role / Device Role / Timing Role: Read-only execution memory during system initialization; write-protected except during controlled firmware upgrades. Use Value: Sector erase capability allows partial updates without disrupting active runtime partitions, minimizing service window duration. |
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, 3.0V–3.6V VDD, 70 ns access, but lacks SuperFlash® fixed-timing architecture | Higher program/erase variability over lifetime requires dynamic timing margining in firmware | Select if legacy AT29LV footprint compatibility is mandatory and lifetime timing stability is not critical |
| SST39VF020-70-4C-NHE-T | Identical silicon and timing, but commercial temperature grade (0°C to +70°C) instead of industrial | Not qualified for extended ambient environments; unsuitable for outdoor or under-hood deployments | Select only for cost-sensitive consumer-grade applications operating within 0°C–70°C ambient |
Compared with AT29LV020 and SST39VF020-70-4C-NHE-T, the SST39VF020-70-4I-NHE-T provides guaranteed fixed erase/program timing across its full industrial temperature range and 100-year data retention-critical for infrastructure and medical systems where firmware longevity and deterministic update behavior are non-negotiable.
Availability
SST39VF020-70-4I-NHE-T is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for SST39VF020-70-4I-NHE-T 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 global semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security solutions for embedded systems.
The SST39VF series belongs to Microchip's Multi-Purpose Flash (MPF) product line, designed specifically for reliable, low-voltage, sector-erasable nonvolatile storage in resource-constrained embedded applications.
FAQ
What is the operating voltage range for SST39VF020-70-4I-NHE-T?
The SST39VF020-70-4I-NHE-T operates from 2.7V to 3.6V for both read and write operations. This wide supply range supports compatibility with 3.3V systems and maintains functionality during brown-out conditions down to 2.7V. The device includes on-chip VPP generation, eliminating the need for an external high-voltage programming supply. SST39VF020-70-4I-NHE-T is specified for industrial temperature range (–40°C to +85°C) under this voltage window.
Does SST39VF020-70-4I-NHE-T support sector erase, and what is the sector size?
Yes, SST39VF020-70-4I-NHE-T supports uniform sector erase with each sector sized at 4 Kbytes, totaling 64 erasable sectors across its 256K × 8 array. Sector erase is initiated via a six-byte JEDEC-standard command sequence ending with command 30H and a sector address. The SST39VF020-70-4I-NHE-T guarantees 18 ms typical erase time per sector, with fixed timing independent of endurance cycle count due to SuperFlash® technology.
How does SST39VF020-70-4I-NHE-T indicate completion of a program or erase operation?
SST39VF020-70-4I-NHE-T provides two hardware-supported status detection methods: Data# Polling (DQ7) and Toggle Bit (DQ6). During internal operations, DQ7 toggles between complement and true data, while DQ6 alternates logic states; both stabilize upon completion. These signals are valid after the fourth WE#/CE# edge for program and sixth edge for erase. SST39VF020-70-4I-NHE-T requires no external polling timer, enabling efficient host CPU utilization during nonvolatile writes.
Is SST39VF020-70-4I-NHE-T pin-compatible with other devices in the SST39VF family?
Yes, SST39VF020-70-4I-NHE-T shares identical pinout, command set, and electrical interface with SST39VF010 and SST39VF040 in both 32-lead PLCC and TSOP packages. Address mapping differs (A17 vs A16/A18), but physical pin functions-including CE#, OE#, WE#, DQ0–DQ7, and A0–A16-are fully aligned. SST39VF020-70-4I-NHE-T maintains JEDEC-standard x8 Flash pin assignments, enabling layout reuse across density variants where address decoding accommodates 256K depth.
What data protection mechanisms does SST39VF020-70-4I-NHE-T implement?
SST39VF020-70-4I-NHE-T implements dual-layer data protection: hardware features include <5 ns glitch immunity on WE#/CE#, VDD power-up/down detection below 1.5V, and write-inhibit mode (OE# low, CE# high, or WE# high); software protection uses JEDEC-standard 3-byte unlock for program and 6-byte unlock for erase. SST39VF020-70-4I-NHE-T ships with software data protection permanently enabled, preventing inadvertent writes during power transitions or noise events.
SST39VF020-70-4I-NHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- 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-T FAQ
1.How can I place an order for SST39VF020-70-4I-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF020-70-4I-NHE-T 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-T reliable?
The price and inventory of SST39VF020-70-4I-NHE-T 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-T is usually 5 days.
3.What payment methods are accepted for SST39VF020-70-4I-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF020-70-4I-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF020-70-4I-NHE-T?
SST39VF020-70-4I-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF020-70-4I-NHE-T 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-T?
For technical support, including SST39VF020-70-4I-NHE-T 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-T requirements.
6.How does Aetrix verify that SST39VF020-70-4I-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF020-70-4I-NHE-T 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-T meets industry standards.
7.What is the process for return or replacement of SST39VF020-70-4I-NHE-T?
All SST39VF020-70-4I-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF020-70-4I-NHE-T, 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-T part is unused and in its original packaging.
Return procedure for SST39VF020-70-4I-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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