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Microchip Technology SST39VF401C-70-4C-EKE-T
- Part No.:
- SST39VF401C-70-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF401C-70-4C-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,201
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Product details
Overview
SST39VF401C-70-4C-EKE-T from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for embedded program/data storage in microcontroller-based systems. It operates at 2.7–3.6V, delivers 70 ns read access time, supports hardware block protection on the bottom 8 KWord boot sector (00000H–01FFFH), and features erase-suspend/resume capability for real-time firmware updates.
For engineers reviewing the SST39VF401C-70-4C-EKE-T datasheet, SST39VF401C-70-4C-EKE-T pinout, SST39VF401C-70-4C-EKE-T application, or SST39VF401C-70-4C-EKE-T equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, and validated alternative flash parts for industrial control, BIOS storage, and FPGA configuration applications.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional NOR flash. It uses standard JEDEC x16 command sets (including CFI query, software ID, and security ID) and supports three write status detection methods: Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and RY/BY# open-drain output.
Hardware protection is implemented via WP# pin to lock the bottom 8 KWord boot block (00000H–01FFFH); RST# provides hardware reset to Read mode; and Auto Low Power mode reduces active read current from 5 mA to 3 µA after valid access. Sector-erase (2 KWord uniform), block-erase (flexible 4/8/16/32 KWord), and chip-erase are all supported with six-byte command sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), providing 512 KB of nonvolatile storage for firmware or configuration data |
| Read Access Time | 70 ns - enables direct execution (XIP) from flash in 5 MHz–20 MHz microcontroller bus environments |
| Supply Voltage | 2.7–3.6V - compatible with single-supply 3.3V systems without level-shifting |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years of operation |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage (e.g., industrial backup memory) |
| Erase Granularity | Uniform 2 KWord sectors + flexible blocks (one 8-, two 4-, one 16-, seven 32-KWord) - supports partial firmware patching |
| Write Protection | Hardware bottom boot block (00000H–01FFFH) via WP# - prevents accidental overwrite of bootloader code |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, JEDEC-standard x16 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus (A17 = AMS); A11–A17 select sector during Sector-Erase; A15–A17 select block during Block-Erase |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during Write; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; must be low to enable Read/Write operations; controls address latch timing |
| OE# | Output Enable | Active-low output gate; used with CE# to initiate Read; high disables outputs to reduce bus contention |
| WE# | Write Enable | Active-low control for Program/Erase; rising edge initiates internal operation; latches command/data |
| WP# | Write Protect | Active-low hardware lock for bottom 8 KWord boot block (00000H–01FFFH); floating = unprotected |
| RST# | Reset | Active-low hardware reset; terminates ongoing Program/Erase and forces return to Read mode |
| RY/BY# | Ready/Busy# | Open-drain status output; low = active Program/Erase; requires external 10–100 kΩ pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during erase, enabling background firmware validation |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space - supports device authentication and traceability |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access - cuts power in intermittent-read applications |
| Fixed Timing Architecture | Word-Program (7 µs), Sector-Erase (18 ms), Chip-Erase (40 ms) remain constant across full endurance life |
| JEDEC Standard Compliance | Pinout, command set, and CFI structure conform to industry-standard x16 flash interfaces - simplifies migration |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS / Bootloader Memory |
|---|---|
|
Use Scenario: Storing firmware images and runtime parameters in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile program memory mapped directly to MCU address space; supports XIP execution with 70 ns access. Use Value: Bottom boot block hardware protection prevents corruption of critical startup code during field firmware updates. |
Use Scenario: Holding BIOS, UEFI, or secure boot loader code in industrial motherboards and single-board computers. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-on reset; relies on RST# and WP# for fail-safe initialization. Use Value: 100,000-cycle endurance and >100-year data retention ensure reliable boot across product lifecycle without refresh. |
| FPGA Configuration Storage | Medical Device Parameter Logging |
|
Use Scenario: Storing bitstream configuration data for SRAM-based FPGAs in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Serial or parallel configuration memory loaded at power-up; leverages fast 40 ms chip-erase for rapid reconfiguration. Use Value: Sector-erase capability enables selective update of FPGA feature modules without full reprogramming. |
Use Scenario: Recording calibration coefficients, usage logs, and safety-critical operational history in Class II medical devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile storage with Security ID for audit trail integrity verification. Use Value: Hardware WP# lock + software data protection prevents unauthorized parameter modification during service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6V only; no Auto Low Power mode; bottom boot block; lacks Security ID | Compatible for basic BIOS storage but not suitable where 2.7V operation or secure ID is required | Select if cost sensitivity outweighs low-voltage support and security features |
| EN29LV400AB-70TP | 4 Mbit x16, 70 ns, 2.7–3.6V; bottom boot block; no erase-suspend; no Security ID; different command set | Functional substitute for legacy designs but requires firmware adaptation due to non-JEDEC command differences | Select only for drop-in replacement in existing EN29LV400AB-based designs with verified compatibility |
Compared with SST39VF401C-70-4C-EKE-T, MX29LV400CBTI-70G omits low-voltage margin and security features, while EN29LV400AB-70TP requires command-set validation and lacks erase-suspend-making SST39VF401C-70-4C-EKE-T the preferred choice for new designs requiring robustness, flexibility, and security.
Availability
SST39VF401C-70-4C-EKE-T is available at Aetrix Electronics and suitable for industrial control systems, medical device firmware storage, and FPGA configuration requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SST39VF401C-70-4C-EKE-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 acquired Silicon Storage Technology (SST) in 2016 and now manufactures and supports the SST39VF series as part of its broad flash memory portfolio.
The SST39VF401C-70-4C-EKE-T belongs to the Multi-Purpose Flash Plus (MPF+) family, engineered for high-reliability embedded applications demanding fast, low-power, and secure nonvolatile storage with flexible erase granularity.
FAQ
What voltage range does the SST39VF401C-70-4C-EKE-T support for read and write operations?
The SST39VF401C-70-4C-EKE-T supports a single 2.7–3.6V supply for both read and write operations. Unlike the SST39LF401C variant (3.0–3.6V only), this voltage range ensures compatibility with 2.7V–3.3V systems without external regulation. All timing specifications-including 70 ns read access and 7 µs word-program-are guaranteed across this full range. The device includes VDD power-up/down detection to inhibit writes below 1.5V, preventing corruption during brown-out conditions.
How is hardware write protection implemented on the SST39VF401C-70-4C-EKE-T?
Hardware write protection on the SST39VF401C-70-4C-EKE-T is enforced via the WP# pin, which locks the bottom 8 KWord boot block (address range 00000H–01FFFH). When WP# is driven low, Program and Erase operations on this region are blocked. If left floating, an internal pull-up holds WP# high, leaving the boot block unprotected. This mechanism is independent of software data protection and provides fail-safe bootloader integrity-critical for industrial and medical applications where firmware recovery must remain guaranteed.
Does the SST39VF401C-70-4C-EKE-T support erase-suspend functionality, and how is it used?
Yes, the SST39VF401C-70-4C-EKE-T supports Erase-Suspend and Erase-Resume commands (B0H and 30H). During a Sector- or Block-Erase, issuing B0H suspends the operation within ~20 µs, allowing reads from any non-suspended sector or programming into unlocked areas. This enables real-time diagnostics or UI responsiveness during firmware updates. Resume is triggered by issuing 30H at any address. Importantly, DQ2 toggling indicates erase-suspended status, and DQ6 = '1' confirms suspended mode-providing deterministic status feedback without polling overhead.
What is the purpose of the Security ID feature in the SST39VF401C-70-4C-EKE-T?
The SST39VF401C-70-4C-EKE-T includes a 136-word Security ID space: 128 bits factory-programmed with a unique random number and 128 words user-programmable. This supports device authentication, anti-cloning, and secure firmware binding. Users program the space via the Security ID Word-Program command (A5H), then lock it permanently using the User Sec ID Program Lock-Out (85H). Once locked, no further writes are possible-and neither segment can be erased. This feature is essential for regulated markets like medical and aerospace where traceability and tamper resistance are mandated.
How does the Auto Low Power mode function in the SST39VF401C-70-4C-EKE-T?
The SST39VF401C-70-4C-EKE-T enters Auto Low Power mode automatically after a valid Read operation completes, reducing active current from 5 mA to 3 µA. It exits instantly on any address or control signal transition-no access time penalty. This mode is disabled at power-up until the first address change or CE# toggle, preventing unintended entry during initialization. The feature significantly lowers average power in intermittently accessed applications such as sensor nodes or HMI displays, extending battery life without firmware changes.
SST39VF401C-70-4C-EKE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 10µs
- 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:
- 48-TSOP
SST39VF401C-70-4C-EKE-T FAQ
1.How can I place an order for SST39VF401C-70-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4C-EKE-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 SST39VF401C-70-4C-EKE-T reliable?
The price and inventory of SST39VF401C-70-4C-EKE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF401C-70-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4C-EKE-T?
SST39VF401C-70-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4C-EKE-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 SST39VF401C-70-4C-EKE-T?
For technical support, including SST39VF401C-70-4C-EKE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF401C-70-4C-EKE-T requirements.
6.How does Aetrix verify that SST39VF401C-70-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4C-EKE-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 SST39VF401C-70-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4C-EKE-T?
All SST39VF401C-70-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4C-EKE-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 SST39VF401C-70-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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