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Microchip Technology SST39VF040-70-4C-WHE
- Part No.:
- SST39VF040-70-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39VF040-70-4C-WHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,305
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Product details
Overview
SST39VF040-70-4C-WHE from Microchip Technology (formerly Silicon Storage Technology) is a 4 Mbit (512K × 8) CMOS Multi-Purpose Flash memory IC designed for nonvolatile program/data storage in embedded systems. It operates from 2.7–3.6 V, features 70 ns read access time, 100,000 write/erase cycles endurance, and 100+ years data retention. It is commonly used in firmware storage for industrial controllers, BIOS/UEFI modules, and legacy microcontroller boot memory.
For engineers reviewing the SST39VF040-70-4C-WHE datasheet, SST39VF040-70-4C-WHE pinout, SST39VF040-70-4C-WHE application, or SST39VF040-70-4C-WHE equivalent, key selection criteria include its 2.7–3.6 V wide VDD range, JEDEC-standard x8 parallel interface, sector-erase architecture, SuperFlash® reliability, and compatibility with legacy 32-pin PLCC or TSOP footprint designs.
Technical Context
The SST39VF040-70-4C-WHE implements SST's proprietary SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count. It supports standard JEDEC x8 command sets including Byte-Program, Sector-Erase (4 KB uniform sectors), and Chip-Erase via six-byte software sequences.
It uses dual status detection-Data# Polling (DQ7) and Toggle Bit (DQ6)-to signal completion of internal Program or Erase operations. Hardware protections include VDD power-up/down detection, noise/glitch immunity (<5 ns pulse rejection), and Write Inhibit mode via CE#, OE#, or WE# control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - provides sufficient space for firmware images up to ~512 KB in legacy 8-bit bus systems. |
| Read Access Time | 70 ns - enables direct execution from flash (XIP) in systems with ≤14 MHz bus timing budgets. |
| Supply Voltage | 2.7–3.6 V - supports single-supply operation in battery-backed or low-voltage industrial environments. |
| Endurance | 100,000 cycles - ensures reliable field updates across product lifetime without premature wear-out. |
| Data Retention | >100 years - guarantees long-term firmware integrity without refresh in unpowered storage. |
| Sector Size | 4 KB uniform sectors - allows granular firmware patching without erasing full device contents. |
| Active Current | 5 mA typical at 14 MHz - minimizes power draw during active read operations in energy-constrained systems. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm) - surface-mount compatible with automated PCB assembly and space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | A0–A17 used for 512K × 8 addressing; A18 is NC for this density but reserved per family pinout - ensures drop-in compatibility across SST39VF010/020/040 variants. |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus with tri-state outputs controlled by CE# and OE# - interfaces directly with 8-bit microcontrollers and ASICs. |
| CE# | Chip Enable | Active-low chip select - enables device decoding in multi-chip memory maps; high state places device in ultra-low standby (1 µA). |
| OE# | Output Enable | Active-low output gate - allows shared bus operation and eliminates bus contention during read cycles. |
| WE# | Write Enable | Active-low write control - initiates Byte-Program, Sector-Erase, and Chip-Erase commands when combined with CE# and address/data sequences. |
| VDD | Power Supply | 2.7–3.6 V supply input - includes on-chip voltage regulation for internal programming; no external VPP required. |
| VSS | Ground | Reference ground for all I/O and core logic - requires low-impedance connection to minimize noise during erase/write transitions. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell architecture delivers fixed 18 ms sector-erase and 70 ms chip-erase times regardless of accumulated cycles - eliminates software de-rating and simplifies timing-critical firmware updates. |
| Software Data Protection | Three-byte (Byte-Program) and six-byte (Erase) command sequences prevent accidental writes during power transitions - meets JEDEC JESD21-C requirements for robust system-level firmware safety. |
| Status Detection | DQ7 (Data# Polling) and DQ6 (Toggle Bit) provide real-time, non-blocking feedback on internal operation completion - enables efficient host CPU utilization during background erase/program tasks. |
| Low Standby Current | 1 µA typical - reduces quiescent power in always-on industrial equipment and extends battery life in backup-configured systems. |
| JEDEC Standard Compliance | Pinout and command set conform to JEDEC publication 21-C - ensures interoperability with existing 8-bit flash memory controllers and development tools. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded Boot Memory |
|---|---|
|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot code and parameter storage accessed via 8-bit parallel bus during cold start and runtime reconfiguration. Use Value: 2.7–3.6 V operation ensures stable function across brownout conditions; 100,000-cycle endurance supports frequent field firmware upgrades without hardware replacement. |
Use Scenario: Providing boot ROM for 8-bit and 16-bit microcontrollers (e.g., 8051, Z80, Motorola 68K) in medical devices and test equipment. IC Role / Device Role / Timing Role: Primary XIP-capable instruction memory mapped into processor address space with 70 ns access enabling deterministic boot timing. Use Value: 70 ns read speed meets timing constraints of legacy bus architectures; RoHS-compliant TSOP package supports modern reflow assembly while maintaining backward footprint compatibility. |
| BIOS/UEFI Module Storage | Communications Equipment Configuration |
|
Use Scenario: Holding BIOS or UEFI firmware in legacy server motherboards and embedded computing platforms requiring field-upgradable boot code. IC Role / Device Role / Timing Role: System-critical nonvolatile memory accessed during POST and runtime firmware update via SPI-to-parallel bridge or dedicated flash controller. Use Value: Sector-erase capability enables partial updates without full chip reprogramming; >100-year data retention prevents corruption over multi-decade product lifecycles. |
Use Scenario: Storing configuration profiles, calibration tables, and protocol stacks in telecom line cards and base station subsystems. IC Role / Device Role / Timing Role: Parameter memory updated infrequently but requiring guaranteed integrity under thermal cycling and EMI stress. Use Value: SuperFlash® reliability ensures zero bit errors after 100,000 cycles; hardware write inhibit prevents corruption during power interruption common in distributed telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV040CTTI-70G | 4 Mbit, 70 ns, 3.0–3.6 V only; lacks 2.7 V lower limit; uses different command set (AMD-style vs JEDEC). | Not suitable for 2.7 V systems; requires firmware driver modification due to non-JEDEC command sequences. | Select only if existing design already uses Macronix-compatible drivers and operates strictly ≥3.0 V. |
| EN29LV040A-70TP | 4 Mbit, 70 ns, 2.7–3.6 V; JEDEC-compatible but slower sector-erase (50 ms typ vs 18 ms) and lower endurance (10,000 cycles). | Acceptable for infrequent updates but unsuitable for high-cycle field maintenance scenarios. | Choose when cost is primary constraint and update frequency is low; verify timing margins for sector-erase in real-time systems. |
Compared with MX29LV040CTTI-70G and EN29LV040A-70TP, the SST39VF040-70-4C-WHE offers broader voltage tolerance, faster and more predictable erase performance, and higher endurance - making it preferable for industrial firmware storage where reliability and update flexibility are critical.
Availability
SST39VF040-70-4C-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded boot memory, BIOS/UEFI module storage, and communications equipment configuration requiring stable component supply and long-term obsolescence management.
Supply support for SST39VF040-70-4C-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 now manufactures and supports the SST39VF series as part of its broad portfolio of nonvolatile memory solutions.
The SST39VF040-70-4C-WHE belongs to SST's Multi-Purpose Flash (MPF) product line, engineered specifically for cost-sensitive, reliability-critical embedded applications requiring robust firmware storage with minimal external circuitry.
FAQ
What is the maximum operating temperature range for the SST39VF040-70-4C-WHE?
The SST39VF040-70-4C-WHE is rated for commercial operation from 0°C to +70°C and industrial operation from –40°C to +85°C. Its specified 2.7–3.6 V supply range and 100,000-cycle endurance remain valid across the full industrial temperature range, making it suitable for deployment in outdoor or factory-floor environments where thermal stability is essential. The SST39VF040-70-4C-WHE datasheet confirms these limits in Table 6.
Does the SST39VF040-70-4C-WHE require an external VPP voltage for programming?
No, the SST39VF040-70-4C-WHE does not require an external VPP voltage. It generates all necessary high-voltage programming signals internally using its on-chip charge pump, enabled solely by the 2.7–3.6 V VDD supply. This eliminates the need for additional power rails or voltage translators, simplifying board design and reducing BOM cost. The SST39VF040-70-4C-WHE specification explicitly states "Internal VPP Generation" as a feature.
How many address lines does the SST39VF040-70-4C-WHE use for 512K × 8 addressing?
The SST39VF040-70-4C-WHE uses 19 address lines (A0–A18) to decode its 512K × 8 memory array. A0–A17 provide the full 18-bit address space (2¹⁸ = 262,144 words), while A18 is designated as "NC" (No Connect) for this density but retained in the pinout for family compatibility with higher-density variants. Pin assignment diagrams in Figures 2 and 3 of the SST39VF040-70-4C-WHE datasheet confirm this mapping.
Can the SST39VF040-70-4C-WHE be used as a direct replacement for the SST39LF040-70-4C-WHE?
The SST39VF040-70-4C-WHE is not a direct replacement for the SST39LF040-70-4C-WHE due to differing supply voltage requirements: the LF variant requires 3.0–3.6 V, while the VF variant operates down to 2.7 V. Although pinout, command set, and timing are identical, substituting the VF part into a 3.0 V–only system may cause marginal behavior. The SST39VF040-70-4C-WHE datasheet specifies separate operating ranges in Tables 5 and 6, confirming this distinction.
What is the purpose of the AMS pin designation in the SST39VF040-70-4C-WHE datasheet?
"AMS" (Address Most Significant) in the SST39VF040-70-4C-WHE datasheet refers to the highest-order address pin used for sector/block selection during erase operations - A16 for SST39VF010, A17 for SST39VF020, and A18 for SST39VF040. For the SST39VF040-70-4C-WHE, AMS corresponds to A18, which is labeled NC in the pin table but functionally active during sector-erase address latching. This terminology ensures consistent documentation across the product family despite varying densities.
SST39VF040-70-4C-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:
- 4Mbit
- Memory Organization:
- 512K 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
SST39VF040-70-4C-WHE FAQ
1.How can I place an order for SST39VF040-70-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF040-70-4C-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 SST39VF040-70-4C-WHE reliable?
The price and inventory of SST39VF040-70-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF040-70-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39VF040-70-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF040-70-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF040-70-4C-WHE?
SST39VF040-70-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF040-70-4C-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 SST39VF040-70-4C-WHE?
For technical support, including SST39VF040-70-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF040-70-4C-WHE requirements.
6.How does Aetrix verify that SST39VF040-70-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39VF040-70-4C-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 SST39VF040-70-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39VF040-70-4C-WHE?
All SST39VF040-70-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF040-70-4C-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 SST39VF040-70-4C-WHE part is unused and in its original packaging.
Return procedure for SST39VF040-70-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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