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Microchip Technology SST39VF040-70-4I-WHE
- Part No.:
- SST39VF040-70-4I-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39VF040-70-4I-WHE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,654
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Product details
Overview
SST39VF040-70-4I-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 used in firmware storage for industrial controllers, BIOS/UEFI modules, and legacy communication equipment requiring field-upgradable code.
For engineers reviewing the SST39VF040-70-4I-WHE datasheet, SST39VF040-70-4I-WHE pinout, SST39VF040-70-4I-WHE application, or SST39VF040-70-4I-WHE equivalent, key selection criteria include its 2.7–3.6 V wide VDD range, JEDEC-standard x8 parallel interface, sector-erase architecture (4 KB uniform sectors), SuperFlash® technology reliability, and industrial temperature rating (–40°C to +85°C).
Technical Context
The SST39VF040-70-4I-WHE implements a split-gate SuperFlash® cell with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash. Its command-set architecture uses standard microprocessor write sequences with six-byte software data protection (SDP) for chip-erase and sector-erase, and three-byte SDP for byte-program operations.
It supports dual control modes: WE#- or CE#-initiated operations, with latched address/data inputs and tri-state outputs gated by OE#. End-of-write detection is implemented via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after the fourth (program) or sixth (erase) WE#/CE# pulse edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8) - supports full firmware images for mid-complexity microcontrollers without external memory expansion. |
| Read Access Time | 70 ns - enables direct execution (XIP) from flash in systems with ≤14 MHz bus timing budgets. |
| Supply Voltage Range | 2.7–3.6 V - compatible with 3.3 V logic rails and tolerant of brown-out conditions down to 2.7 V during write operations. |
| Endurance | 100,000 cycles (typical) - sufficient for field firmware updates over 10+ years in industrial maintenance cycles. |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications such as configuration backup or calibration tables. |
| Sector Size | 4 KB uniform sectors - allows granular firmware patching without erasing entire device; 128 sectors total. |
| Write Timing | Byte-program: 14 µs (typ); Chip-erase: 70 ms (typ) - enables rapid reprogramming during production test or in-system update windows. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS compliant, industrial temperature grade (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | A0–A15 select byte location; A16–A18 (AMS) define sector/block address during erase; A18 active for SST39VF040. |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; outputs tri-stated when CE# or OE# high; latched on write rising edge of WE#/CE#. |
| CE# | Chip Enable | Active-low device selection; must be low for read/write; high = standby mode (1 µA current). |
| OE# | Output Enable | Active-low output gating; controls DQ bus drive; high = high-impedance state regardless of CE#. |
| WE# | Write Enable | Active-low control for write cycles; initiates internal program/erase upon rising edge; latches data/address on falling/rising edges. |
| VDD | Power Supply | 2.7–3.6 V supply; internal charge pump generates VPP for programming; no external high-voltage source required. |
| VSS | Ground | Reference return path for all signals and power; decoupling capacitor placement critical near VDD/VSS pins. |
| NC | No Connection | Pins 12, 16, 24, 30 are unconnected; must remain floating per datasheet to avoid latch-up risk. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector delivers stable 70 ns read and fixed 14 µs byte-program time across full lifecycle-no software de-rating needed. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and mandatory JEDEC-compliant 3-/6-byte command sequences prevent accidental writes. |
| Uniform 4 KB Sector Architecture | Enables selective firmware patching: only modified sectors erased, preserving intact code and reducing update time vs. full-chip erase. |
| Industrial Temperature Rating | –40°C to +85°C operation confirmed per Table 6 - validated for deployment in motor drives, PLCs, and outdoor telecom hardware. |
| JEDEC-Standard x8 Interface | Pinout and command set compliant with industry-standard parallel NOR flash - simplifies migration from legacy devices like AM29LV400B or S29GL032N. |
Applications
| Industrial PLC Firmware Storage | Legacy Telecom Equipment Boot Code |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers deployed in factory automation environments with ambient temperatures up to +75°C. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to microcontroller address space; accessed via 8-bit parallel bus during cold start and runtime updates. Use Value: 100,000-cycle endurance supports 5+ years of scheduled firmware upgrades; 2.7–3.6 V operation tolerates industrial power rail fluctuations. | Use Scenario: Holding boot loader and DSP initialization code in TDM-based voice gateways operating continuously in telco central offices. IC Role / Device Role / Timing Role: Primary XIP (execute-in-place) memory for ARM7TDMI or similar host processor; read at 70 ns to meet real-time boot timing constraints. Use Value: >100-year data retention eliminates need for battery-backed SRAM; 4 KB sector erase enables field patching of security patches without full reload. |
| Embedded Medical Device Calibration Tables | Automotive Body Control Module (BCM) Configuration |
Use Scenario: Storing sensor calibration coefficients and safety-critical lookup tables in portable diagnostic equipment certified to IEC 60601-1. IC Role / Device Role / Timing Role: Read-only configuration memory accessed on power-up and during self-test routines; write-enabled only during service-mode calibration. Use Value: Industrial temp rating ensures reliability across clinical environments (15–35°C ambient); RoHS compliance meets medical regulatory requirements. | Use Scenario: Holding vehicle-specific configuration data (e.g., door lock behavior, lighting profiles) in BCMs subject to automotive thermal cycling (–40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile parameter store interfaced to 8-bit MCU via parallel bus; updated during dealership reprogramming sessions. Use Value: Verified industrial-grade operation matches AEC-Q100 Grade 3 temperature profile; sector-erase prevents corruption of unrelated vehicle settings during partial updates. |
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 |
|---|---|---|---|
| MX29LV400CBTI-70G | 4 Mbit, 70 ns, 3.0–3.6 V only; lacks 2.7 V lower limit; requires external VPP for programming. | Not suitable for 2.7 V systems; higher system BOM cost due to external voltage generation. | Select SST39VF040-70-4I-WHE when 2.7 V operation or integrated VPP is required. |
| S29GL032N90TFI010 | 32 Mbit, 90 ns, 2.7–3.6 V; uses CFI command set; larger density and slower access than SST39VF040. | Overkill for 4 Mbit use cases; longer read latency increases boot time; higher pin count (48-pin TSOP). | Select SST39VF040-70-4I-WHE for cost-sensitive, space-constrained designs needing exact 4 Mbit capacity and 70 ns speed. |
Compared with MX29LV400CBTI-70G and S29GL032N90TFI010, the SST39VF040-70-4I-WHE uniquely combines 2.7 V minimum VDD, integrated VPP generation, 70 ns read speed, and 32-pin TSOP footprint-making it optimal for retrofitting legacy 4 Mbit systems where voltage margin and board space are constrained.
Availability
SST39VF040-70-4I-WHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom boot code, embedded medical calibration tables, and automotive BCM configuration requiring stable component supply across extended product lifecycles.
Supply support for SST39VF040-70-4I-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 2016 and continues to manufacture and support the SuperFlash® family of NOR flash products for industrial and embedded applications.
The SST39VF series belongs to Microchip's legacy parallel NOR flash product line, engineered specifically for reliable, low-voltage, field-upgradable firmware and configuration storage in resource-constrained embedded systems.
FAQ
What is the guaranteed operating temperature range for SST39VF040-70-4I-WHE?
The SST39VF040-70-4I-WHE is rated for industrial temperature operation from –40°C to +85°C, as specified in Table 6 of the DS25023B datasheet. This range is validated for continuous operation and applies to all electrical characteristics including read access time (70 ns), endurance (100,000 cycles), and data retention (>100 years). The "I" suffix in the part number explicitly denotes industrial grade.
Does SST39VF040-70-4I-WHE require an external VPP voltage for programming?
No, the SST39VF040-70-4I-WHE does not require an external VPP voltage. It integrates an internal charge pump that generates the necessary high voltage for programming and erasing using only the 2.7–3.6 V VDD supply. This eliminates the need for external high-voltage circuitry and simplifies system design compared to older parallel flash devices.
How many address lines does SST39VF040-70-4I-WHE use, and what is the role of AMS?
The SST39VF040-70-4I-WHE uses address lines A0–A18. A0–A15 select individual bytes within the 512K × 8 array. AMS (Address Most Significant) refers collectively to A16–A18; for SST39VF040, AMS = A18 is active and selects the target 4 KB sector during sector-erase operations, enabling precise, non-disruptive firmware updates.
What command sequence is required to perform a chip-erase on SST39VF040-70-4I-WHE?
To perform chip-erase on SST39VF040-70-4I-WHE, execute the six-byte software data protection sequence: write AAH to address 5555H, 55H to 2AAAH, then 80H to 5555H, followed by another AAH to 5555H, 55H to 2AAAH, and finally 10H to 5555H. The internal chip-erase begins after the sixth WE# or CE# pulse rising edge and completes in 70 ms (typical). Data# Polling (DQ7) or Toggle Bit (DQ6) confirms completion.
Is SST39VF040-70-4I-WHE pin-compatible with SST39VF020-70-4I-WHE or SST39VF010-70-4I-WHE?
Yes, SST39VF040-70-4I-WHE is pin-compatible with SST39VF020-70-4I-WHE and SST39VF010-70-4I-WHE in the same 32-lead TSOP package. All share identical pin assignments, signal definitions, and command sets. The only differences are memory size (128K×8, 256K×8, 512K×8) and corresponding address line usage (A16, A17, A18), allowing drop-in replacement where capacity permits.
SST39VF040-70-4I-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:
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39VF040-70-4I-WHE FAQ
1.How can I place an order for SST39VF040-70-4I-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF040-70-4I-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 SST39VF040-70-4I-WHE reliable?
The price and inventory of SST39VF040-70-4I-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF040-70-4I-WHE is usually 5 days.
3.What payment methods are accepted for SST39VF040-70-4I-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF040-70-4I-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF040-70-4I-WHE?
SST39VF040-70-4I-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF040-70-4I-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 SST39VF040-70-4I-WHE?
For technical support, including SST39VF040-70-4I-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF040-70-4I-WHE requirements.
6.How does Aetrix verify that SST39VF040-70-4I-WHE is sourced from the original manufacturer or authorized distributors?
All SST39VF040-70-4I-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 SST39VF040-70-4I-WHE meets industry standards.
7.What is the process for return or replacement of SST39VF040-70-4I-WHE?
All SST39VF040-70-4I-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF040-70-4I-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 SST39VF040-70-4I-WHE part is unused and in its original packaging.
Return procedure for SST39VF040-70-4I-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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