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Microchip Technology SST39VF020-70-4C-WHE
- Part No.:
- SST39VF020-70-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39VF020-70-4C-WHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:464
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Product details
Overview
SST39VF020-70-4C-WHE from Microchip Technology (formerly Silicon Storage Technology) is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with single-supply 2.7–3.6 V write operation, 70 ns read access time, and JEDEC-standard x8 parallel interface. It features uniform 4 KB sectors, 100,000 program/erase cycles endurance, and >100 years data retention - deployed in embedded firmware storage for industrial controllers and legacy BIOS modules.
For engineers reviewing the SST39VF020-70-4C-WHE datasheet, SST39VF020-70-4C-WHE pinout, SST39VF020-70-4C-WHE application, or SST39VF020-70-4C-WHE equivalent, key selection criteria include its 32-pin TSOP (8 mm × 14 mm) package, sector-erase capability, hardware/software data protection, and compatibility with standard 8-bit microprocessor buses requiring nonvolatile code storage.
Technical Context
The SST39VF020-70-4C-WHE implements SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count. Its control logic accepts standard JEDEC command sequences (e.g., 6-byte sector-erase, 3-byte byte-program) via CE#, OE#, and WE# pins.
It supports two operating modes: Read (CE# & OE# low), and Write (CE# & WE# low, OE# high), with status detection via DQ7 (Data# Polling) and DQ6 (Toggle Bit). The device uses latched address/data inputs and tri-state outputs compliant with CMOS I/O voltage levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - provides sufficient space for boot code, configuration tables, or firmware patches in resource-constrained 8-bit systems. |
| Read Access Time | 70 ns - enables direct execution from flash (XIP) at up to ~14 MHz bus frequency without wait states in compatible controllers. |
| Supply Voltage Range | 2.7–3.6 V - supports single-rail operation in battery-backed or low-voltage industrial designs, eliminating need for separate VPP programming voltage. |
| Endurance | 100,000 program/erase cycles - ensures reliable field updates over product lifetime in applications like programmable logic controllers (PLCs). |
| Data Retention | >100 years - guarantees long-term integrity of stored firmware or calibration data without refresh, critical for unattended equipment. |
| Sector Size | Uniform 4 KB sectors - allows granular firmware updates without erasing entire device, reducing downtime during field upgrades. |
| Standby Current | 1 µA typical - minimizes quiescent power draw in always-on embedded systems such as smart meters or remote sensors. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, standard pinout per JEDEC MS-024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 8 addressing; A17 = AMS (most significant address) selects sector/block during erase operations. |
| DQ0–DQ7 | Data Input/Output | Bidirectional 8-bit data bus; outputs tri-stated when CE# or OE# is high; supports latched writes and polling on DQ6/DQ7. |
| CE# | Chip Enable | Active-low chip select; must be low for read/write access; high state places device in standby (1 µA current). |
| OE# | Output Enable | Active-low output gate; controls data bus drivers during read; irrelevant during write (OE# must be high). |
| WE# | Write Enable | Active-low write strobe; initiates byte-program, sector-erase, or chip-erase upon valid command sequence. |
| VDD | Power Supply | 2.7–3.6 V supply; internal charge pump generates programming voltage - no external VPP required. |
| VSS | Ground | Reference ground for all signals and power; decoupling capacitor recommended near VDD/VSS pins. |
| NC | No Connection | Pins 3, 16, 24, and 32 are unconnected; must remain floating or tied to ground per board layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell architecture delivers fixed 18 ms sector-erase and 14 µs byte-program times regardless of accumulated cycles - eliminates software de-rating. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and mandatory 3-/6-byte JEDEC command sequences prevent accidental writes during brown-out or reset. |
| JEDEC x8 Standard Compliance | Pin-compatible with industry-standard parallel NOR flash devices; simplifies drop-in replacement and reduces PCB redesign risk. |
| Low-Energy Erase/Program | Consumes less total energy than conventional flash due to lower programming current and shorter erase time - extends battery life in portable diagnostics tools. |
| Product Identification Mode | Software-readable Manufacturer ID (BFh) and Device ID (D6h) allow runtime verification of SST39VF020-70-4C-WHE identity in multi-source BOM environments. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS/UEFI Module |
|---|---|
|
Use Scenario: Storing ladder logic programs and I/O configuration maps in modular automation controllers subject to frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile code storage with sector-erase granularity; accessed via 8-bit parallel bus synchronized to system clock. Use Value: 4 KB sector size enables updating individual function blocks without full reflash; 100,000-cycle endurance supports decades of maintenance cycles. |
Use Scenario: Holding boot firmware and hardware initialization routines in desktop motherboards where cost and footprint constrain memory choice. IC Role / Device Role / Timing Role: Primary boot ROM mapped into CPU address space; read at power-on with 70 ns access supporting early-stage initialization timing. Use Value: 70 ns read speed meets legacy chipset timing requirements; TSOP package fits standard BIOS socket footprints without redesign. |
| Medical Device Calibration Data | Point-of-Sale Terminal Configuration |
|
Use Scenario: Retaining sensor calibration coefficients and safety-critical operational parameters in FDA-cleared diagnostic instruments. IC Role / Device Role / Timing Role: Secure, long-retention parameter store; write-protected via hardware inhibit and software lock bits. Use Value: >100-year data retention ensures calibration validity across instrument lifetime; software ID (D6h) confirms authentic Microchip part during regulatory audit. |
Use Scenario: Hosting localized language packs, tax tables, and peripheral driver configurations in retail terminals deployed globally. IC Role / Device Role / Timing Role: Field-upgradable configuration memory accessed by ARM-based host processor via GPIO-controlled parallel interface. Use Value: Uniform 4 KB sectors allow country-specific updates without affecting core application; 2.7 V min operation supports wide-input DC-DC supplies. |
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 |
|---|---|---|---|
| MX29LV020TCI-70G | 2 Mbit, 70 ns, 2.7–3.6 V; requires VPP = 12 V for program/erase; different command set (Spansion-style). | Lacks integrated charge pump; needs external high-voltage generator; not pin-compatible due to VPP pin requirement. | Select only if existing design already includes VPP circuitry and Spansion firmware support is available. |
| EN29LV020-70TIP | 2 Mbit, 70 ns, 2.7–3.6 V; supports both JEDEC and AMD-style commands; no VPP needed. | Same TSOP-32 package and pinout; identical sector architecture; minor timing variations in toggle bit polling behavior. | Drop-in alternative with verified JEDEC mode compatibility; validate toggle bit response timing per EN29LV020 datasheet Section 6.3. |
Compared with MX29LV020TCI-70G, SST39VF020-70-4C-WHE eliminates VPP complexity and reduces BOM count; compared with EN29LV020-70TIP, it offers tighter production lot traceability and longer documented data retention (>100 years vs. 20 years typical).
Availability
SST39VF020-70-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS modules, medical calibration data retention, and point-of-sale terminal configuration requiring stable component supply and long-lifecycle support.
Supply support for SST39VF020-70-4C-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 maintains full support for the SuperFlash® portfolio, emphasizing reliability, low-power nonvolatile memory for industrial and automotive applications.
The SST39VF series was designed specifically for cost-sensitive, space-constrained embedded systems needing robust, single-supply parallel NOR flash - targeting legacy computing, industrial control, and instrumentation markets.
FAQ
What is the exact memory organization of the SST39VF020-70-4C-WHE?
The SST39VF020-70-4C-WHE is organized as 256K words × 8 bits (2 Mbit total), with 64 uniform 4 KB sectors. Address lines A0–A16 cover the 256K address space; A17 serves as the most significant address (AMS) for sector selection during erase operations. This structure is confirmed in the DS25023B datasheet Section 1 and Table 1.
Does the SST39VF020-70-4C-WHE require an external VPP voltage for programming?
No, the SST39VF020-70-4C-WHE does not require an external VPP voltage. It uses an internal charge pump to generate the high voltage needed for programming and erasing, operating solely from the 2.7–3.6 V VDD supply. This is explicitly stated in the "Features" section and "Device Operation" chapter of the DS25023B datasheet.
How is write completion detected on the SST39VF020-70-4C-WHE?
Write completion on the SST39VF020-70-4C-WHE is detected using two methods: Data# Polling (monitoring DQ7) and Toggle Bit (monitoring DQ6). Both are valid after the rising edge of the fourth WE# pulse for byte-program, or sixth WE# pulse for sector/chip-erase. These mechanisms are defined in Sections 7–8 of DS25023B and enable efficient polling without fixed delays.
What packages are offered for the SST39VF020-70-4C-WHE?
The SST39VF020-70-4C-WHE is available in 32-lead TSOP (8 mm × 14 mm) and 32-lead PLCC packages. The "-WHE" suffix specifically denotes the TSOP variant. Pin assignments and mechanical drawings are provided in Figures 2 (PLCC) and 3 (TSOP) of DS25023B, with TSOP being the standard for surface-mount, space-constrained applications.
Is the SST39VF020-70-4C-WHE suitable for industrial temperature range operation?
Yes, the SST39VF020-70-4C-WHE is rated for industrial temperature range (–40°C to +85°C) under 2.7–3.6 V supply, as specified in Table 6 ("Operating Range SST39VF010/020/040") of DS25023B. Its guaranteed 100,000-cycle endurance and >100-year data retention apply across this full range, making it appropriate for harsh-environment deployments.
SST39VF020-70-4C-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39VF020-70-4C-WHE FAQ
1.How can I place an order for SST39VF020-70-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF020-70-4C-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 SST39VF020-70-4C-WHE reliable?
The price and inventory of SST39VF020-70-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF020-70-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39VF020-70-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF020-70-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF020-70-4C-WHE?
SST39VF020-70-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF020-70-4C-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 SST39VF020-70-4C-WHE?
For technical support, including SST39VF020-70-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF020-70-4C-WHE requirements.
6.How does Aetrix verify that SST39VF020-70-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39VF020-70-4C-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 SST39VF020-70-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39VF020-70-4C-WHE?
All SST39VF020-70-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF020-70-4C-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 SST39VF020-70-4C-WHE part is unused and in its original packaging.
Return procedure for SST39VF020-70-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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