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Microchip Technology SST39VF020-70-4I-WHE
- Part No.:
- SST39VF020-70-4I-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39VF020-70-4I-WHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,004
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Product details
Overview
SST39VF020-70-4I-WHE from Microchip Technology (formerly Silicon Storage Technology) is a 2 Mbit (256K × 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 uniform 4 KB sector-erase architecture. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39VF020-70-4I-WHE datasheet, SST39VF020-70-4I-WHE pinout, SST39VF020-70-4I-WHE application, or SST39VF020-70-4I-WHE equivalent, key selection criteria include its industrial temperature range (−40°C to +85°C), SuperFlash technology endurance (100,000 write/erase cycles), 1 µA standby current, and compatibility with standard 8-bit microprocessor buses using CE#, OE#, and WE# control signals.
Technical Context
This device implements SST's proprietary SuperFlash split-gate cell technology with thick-oxide tunneling injector, enabling fixed erase/program timing independent of cycle count and eliminating performance degradation over lifetime. It supports byte-program, sector-erase (4 KB), and chip-erase operations via JEDEC-compliant six-byte software command sequences.
Read and write operations use standard asynchronous parallel bus timing with latched address/data, tri-state I/Os controlled by CE# and OE#, and end-of-write detection via Data# Polling (DQ7) and Toggle Bit (DQ6). Hardware data protection includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection, and write-inhibit mode.
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 - enables direct interfacing with 14 MHz microcontrollers without wait states |
| Supply Voltage | 2.7–3.6 V - supports battery-powered and low-voltage industrial systems |
| Endurance | 100,000 program/erase cycles - ensures reliable firmware updates over product lifetime |
| Data Retention | Greater than 100 years - eliminates need for periodic refresh or backup in static storage applications |
| Standby Current | 1 µA typical - critical for always-on or energy-harvesting edge devices |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded deployment |
Pinout & Package
32-lead TSOP (8 mm × 14 mm) package with JEDEC-standard x8 parallel interface pinout. Pin functions conform to industry-standard flash memory layout for drop-in compatibility with legacy 8-bit bus designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 8 addressing; A17 selects upper half of 512K space (reserved for family scalability) |
| DQ0–DQ7 | Data Input/Output | Bidirectional 8-bit data bus with tri-state control via CE# and OE#; latched during writes |
| CE# | Chip Enable | Active-low chip select; places device in standby (1 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus direction and high-impedance state |
| WE# | Write Enable | Active-low write strobe; initiates byte-program, sector-erase, and chip-erase command sequences |
| VDD | Power Supply | 2.7–3.6 V supply; internally regulated for internal programming voltage generation |
| VSS | Ground | Reference return path for all digital and core memory circuitry |
| NC | No Connection | Pins 12 and 27 are unconnected; must be left floating or tied to ground per PCB design rules |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with fixed 18 ms sector-erase and 70 ms chip-erase times - no timing de-rating over lifetime |
| Software Data Protection | JEDEC-compliant 3-byte (program) and 6-byte (erase) command sequences - prevents accidental writes during power transitions |
| End-of-Write Detection | Dual-mode status reporting via DQ7 (Data# Polling) and DQ6 (Toggle Bit) - enables efficient polling without hardware interrupts |
| Low-Voltage Operation | 2.7 V minimum VDD - supports Li-ion battery (3.0 V nominal) and wide-input DC-DC converter designs |
| RoHS Compliance | Lead-free TSOP package - meets industrial environmental compliance requirements without derating |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage accessed via 8-bit microcontroller bus; 70 ns read time enables real-time scan-cycle execution without wait states. Use Value: 100,000-cycle endurance supports decades of field firmware updates; 1 µA standby current minimizes system power budget during idle periods. | Use Scenario: Holding device-specific configuration parameters (e.g., sensor offsets, alarm thresholds) in portable diagnostic equipment requiring long-term data integrity. IC Role / Device Role / Timing Role: Parameter EEPROM replacement with faster write performance (14 µs byte-program) and guaranteed 100-year data retention. Use Value: SuperFlash fixed-timing eliminates software timing adjustments across product lifecycle; industrial temp rating ensures reliability in clinical settings. |
| Automotive Body Control Module | Smart Energy Meter Firmware |
Use Scenario: Storing lighting control logic and CAN gateway configuration in under-hood body control units exposed to thermal cycling. IC Role / Device Role / Timing Role: Field-upgradable flash memory interfaced to 8-bit automotive MCU; operates reliably at −40°C to +85°C with no external voltage regulation. Use Value: 2.7–3.6 V supply range accommodates automotive battery transients; hardware write-inhibit prevents corruption during cold-cranking events. | Use Scenario: Hosting metering firmware and tariff tables in utility-grade smart meters requiring secure, tamper-resistant storage with >15-year service life. IC Role / Device Role / Timing Role: Primary nonvolatile memory for firmware execution and secure parameter storage; accessed via dedicated memory-mapped bus. Use Value: RoHS-compliant TSOP package meets global regulatory requirements; 100-year data retention eliminates field replacement due to bit rot. |
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, 70 ns, 3.0–3.6 V only; lacks 2.7 V support and SuperFlash fixed-timing guarantee | Requires higher minimum VDD; not rated for full industrial temperature range (−40°C to +85°C) | Select when existing 3.3 V systems require pin-compatible replacement without voltage margin constraints |
| MX29LV020C | 2 Mbit, 70 ns, 2.7–3.6 V; uses standard flash architecture with increasing erase time over cycles | Endurance rated at 100,000 cycles but timing de-rates with usage; no toggle-bit status reporting | Choose where cost sensitivity outweighs long-term timing predictability and status feedback requirements |
Compared with AT29LV020 and MX29LV020C, SST39VF020-70-4I-WHE delivers guaranteed 70 ns access across voltage and temperature, fixed erase timing unaffected by wear, and dual-status detection-critical for deterministic real-time firmware update workflows in industrial and medical systems.
Availability
SST39VF020-70-4I-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive body control module applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39VF020-70-4I-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 2010 and maintains full support for the SuperFlash product line, including manufacturing, documentation, and technical assistance.
The SST39VF series was designed specifically for cost-sensitive, low-power embedded systems needing reliable, field-upgradable nonvolatile memory with industrial temperature operation and JEDEC-standard parallel interface compatibility.
FAQ
What is the maximum operating frequency supported by SST39VF020-70-4I-WHE?
The SST39VF020-70-4I-WHE does not operate at a clock frequency-it is an asynchronous parallel flash memory. Its 70 ns read access time corresponds to a maximum effective bus throughput of ~14.3 MHz when interfaced with a microcontroller using standard wait-state logic. The device requires no external clock signal and relies on CE#, OE#, and WE# timing per JEDEC specifications.
Does SST39VF020-70-4I-WHE support both 32-lead PLCC and TSOP packages?
No-SST39VF020-70-4I-WHE is specifically the 32-lead TSOP (8 mm × 14 mm) variant, indicated by the "WHE" suffix. The PLCC version is designated separately (e.g., SST39VF020-70-4I-PHE). Pinouts differ between packages, and PCB layout is not interchangeable.
How is write protection implemented on SST39VF020-70-4I-WHE?
SST39VF020-70-4I-WHE implements dual-layer write protection: hardware-level inhibition (via VDD monitoring, noise filtering, and OE#/CE#/WE# logic states) and software-level protection using JEDEC-standard 3-byte (program) and 6-byte (erase) command sequences. The device ships with software data protection permanently enabled.
Can SST39VF020-70-4I-WHE be used in place of SST39LF020-70-4I-WHE?
No-SST39VF020-70-4I-WHE operates from 2.7–3.6 V, while SST39LF020-70-4I-WHE requires 3.0–3.6 V. Substituting the VF part into an LF-only design risks instability below 3.0 V; substituting the LF part into a VF design eliminates 2.7 V operation capability and may fail under brown-out conditions. Voltage ranges are not interchangeable.
What does the "4I" in SST39VF020-70-4I-WHE signify?
The "4I" denotes the industrial temperature grade (−40°C to +85°C) and 4 KB uniform sector-erase architecture. It distinguishes this variant from commercial-grade (e.g., "4C") and confirms sector granularity-critical for partial firmware updates without erasing entire memory contents.
SST39VF020-70-4I-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:
- 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-TSOP
SST39VF020-70-4I-WHE FAQ
1.How can I place an order for SST39VF020-70-4I-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF020-70-4I-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 SST39VF020-70-4I-WHE reliable?
The price and inventory of SST39VF020-70-4I-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF020-70-4I-WHE is usually 5 days.
3.What payment methods are accepted for SST39VF020-70-4I-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF020-70-4I-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF020-70-4I-WHE?
SST39VF020-70-4I-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF020-70-4I-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 SST39VF020-70-4I-WHE?
For technical support, including SST39VF020-70-4I-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF020-70-4I-WHE requirements.
6.How does Aetrix verify that SST39VF020-70-4I-WHE is sourced from the original manufacturer or authorized distributors?
All SST39VF020-70-4I-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 SST39VF020-70-4I-WHE meets industry standards.
7.What is the process for return or replacement of SST39VF020-70-4I-WHE?
All SST39VF020-70-4I-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF020-70-4I-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 SST39VF020-70-4I-WHE part is unused and in its original packaging.
Return procedure for SST39VF020-70-4I-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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