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Microchip Technology SST39VF401C-70-4I-EKE
- Part No.:
- SST39VF401C-70-4I-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF401C-70-4I-EKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:398
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Product details
Overview
SST39VF401C-70-4I-EKE from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for embedded firmware and configuration storage in microcontroller-based systems. It operates at 2.7–3.6 V, 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 system responsiveness.
For engineers reviewing the SST39VF401C-70-4I-EKE datasheet, SST39VF401C-70-4I-EKE pinout, SST39VF401C-70-4I-EKE application, or SST39VF401C-70-4I-EKE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, and validated alternative flash parts for industrial firmware upgrades and legacy system replacements.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of endurance cycles. It uses standard JEDEC x16 flash command sets-including six-byte sector/block/erase sequences-and supports three software status detection methods: Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and open-drain RY/BY#.
The SST39VF401C-70-4I-EKE integrates hardware write protection via WP# for bottom-boot-block lockdown, hardware reset (RST#) for forced return to read mode, and CFI Query mode for runtime device identification. Its Auto Low Power mode reduces active read current from 5 mA to 3 µA after valid access, with no access-time penalty on wake-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization), directly maps to 512 KB of 16-bit data space |
| Read Access Time | 70 ns - enables direct execution from flash (XIP) in 14 MHz bus systems without wait states |
| Supply Voltage | 2.7–3.6 V - compatible with 3.3 V logic rails and brown-out tolerant in battery-backed systems |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over 10+ years in deployed equipment |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage applications |
| Block Protection | Bottom 8 KWord (00000H–01FFFH) - safeguards bootloader code against accidental overwrite |
| Package | 48-lead TSOP (12 mm × 20 mm) - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns |
Pinout & Package
48-lead TSOP (Thin Small Outline Package), JEDEC-standard x16 flash footprint, 12 mm × 20 mm body size, die-up orientation, compliant with RoHS and lead-free assembly requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; A17 is most significant bit; AMS = A17 for sector/block selection |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during writes; tri-state when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; must be low to enable read/write operations; controls address/data latch timing |
| OE# | Output Enable | Active-low output gate; used with CE# to control data bus assertion during reads |
| WE# | Write Enable | Active-low write strobe; latches data on rising edge; initiates internal program/erase on fourth/sixth pulse |
| WP# | Write Protect | Active-low hardware lock for bottom boot block (00000H–01FFFH); floating = unprotected |
| RST# | Reset | Active-low hardware reset; terminates ongoing operations and forces return to read mode |
| RY/BY# | Ready/Busy# | Open-drain status output; low = program/erase in progress; requires external 10–100 kΩ pull-up |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash® array; decoupling required per JEDEC guidelines |
| VSS | Ground | Signal and power ground reference; two dedicated pins for noise reduction |
| NC | No Connection | Unbonded pins (A13, A9, A12, A8, A14, A10, A6, A2, A15, A11, A5, A1, A16, DQ7); must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during erase, enabling interrupt-driven firmware updates |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment, locked permanently after programming |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA automatically after valid access-no software intervention needed |
| Uniform Sector Architecture | 256 uniform 2 KWord sectors (4 KB each), simplifying file-system partitioning and wear-leveling algorithms |
| JEDEC Standard Compliance | Fully compatible with industry-standard x16 flash command sets and pinouts-enables drop-in replacement in existing designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating firmware images in programmable logic controllers operating in harsh EMI environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, application firmware, and calibration tables; accessed via parallel x16 bus during cold start and field upgrade. Use Value: Bottom-boot-block protection prevents corruption of critical startup routines during remote firmware updates over CAN or Ethernet. |
Use Scenario: Holding certified bootloader and safety-critical configuration data in Class II medical imaging equipment requiring traceable data integrity. IC Role / Device Role / Timing Role: Secure, long-retention configuration store for FDA-regulated devices; accessed during power-on self-test and runtime parameter validation. Use Value: 100-year data retention and 100,000-cycle endurance ensure compliance with IEC 62304 lifecycle requirements without periodic replacement. |
| Automotive Body Control Module | Legacy Industrial HMI Display |
Use Scenario: Storing vehicle-specific configuration parameters and diagnostic firmware in body control units exposed to automotive-grade thermal cycling (-40°C to +105°C). IC Role / Device Role / Timing Role: JEDEC-compliant flash memory interfaced to 8/16-bit MCUs; supports in-system programming via UART or CAN bootloader. Use Value: 70 ns access time enables zero-wait-state execution from flash, reducing MCU clock load and power consumption in always-on modules. |
Use Scenario: Replacing obsolete EPROMs in aging human-machine interface panels where PCB layout cannot be modified. IC Role / Device Role / Timing Role: Pin-compatible x16 parallel flash replacement for 27C040/29F040 sockets; retains identical address/data/control signal mapping. Use Value: TSOP-48 package and JEDEC pinout allow direct solder-down replacement without adapter boards or redesign. |
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 |
|---|---|---|---|
| SST39VF402C-70-4I-EKE | Top-boot-block protection (3E000H–3FFFFH) instead of bottom; otherwise identical timing, voltage, and command set | Used where bootloader resides in top memory region; incompatible for bottom-boot designs without address remapping | Select only if your system's boot vector targets upper 32 KB and WP# grounding must protect that region |
| MX29LV400CTTI-70G | 70 ns access, 3.0–3.6 V operation, top-boot-block, different command sequence (AMD-style vs JEDEC), no RY/BY# pin | Lacks ready/busy signaling and erase-suspend; requires polling-only status detection; not pin-compatible due to different pin 44 function | Acceptable for cost-sensitive designs where software polling is acceptable and board layout allows pin 44 repurposing |
Compared with SST39VF401C-70-4I-EKE, the SST39VF402C variant shifts protected boot area to the top of memory-requiring firmware address alignment changes-while MX29LV400CTTI lacks RY/BY# and erase-suspend, increasing software complexity and limiting real-time responsiveness during updates.
Availability
SST39VF401C-70-4I-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for SST39VF401C-70-4I-EKE 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 Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and secure connectivity.
The SST39VF401C-70-4I-EKE belongs to Microchip's Multi-Purpose Flash Plus (MPF+) product line, engineered for reliable, low-power firmware and configuration storage in industrial, medical, and automotive systems requiring long-term data integrity and field-upgrade capability.
FAQ
What is the boot-block protection scheme for SST39VF401C-70-4I-EKE?
The SST39VF401C-70-4I-EKE implements bottom hardware block protection on the lowest 8 KWord (00000H–01FFFH), safeguarding bootloader code. When WP# is grounded, program and erase operations to this region are disabled. If WP# floats, an internal pull-up leaves the boot block unprotected-ensuring flexibility during development while enabling secure deployment.
Does SST39VF401C-70-4I-EKE support erase-suspend functionality?
Yes, SST39VF401C-70-4I-EKE supports Erase-Suspend and Erase-Resume commands (B0H and 30H). This allows the host system to temporarily halt an ongoing sector or block erase, read data from other locations, or program non-suspended sectors-critical for real-time systems requiring uninterrupted operation during firmware updates.
What package type is used for SST39VF401C-70-4I-EKE?
SST39VF401C-70-4I-EKE is supplied in a 48-lead TSOP (Thin Small Outline Package) with 12 mm × 20 mm dimensions, JEDEC-standard pinout, and die-up orientation. It is RoHS-compliant and qualified for lead-free reflow soldering per J-STD-020.
How does SST39VF401C-70-4I-EKE indicate completion of a program or erase operation?
SST39VF401C-70-4I-EKE offers three concurrent status detection methods: Data# Polling (DQ7 toggles until complete), Toggle Bits (DQ6 alternates during operation), and Ready/Busy# (RY/BY# open-drain pin pulled low during activity). All are valid after defined WE# edge counts and require no additional hardware beyond a pull-up resistor for RY/BY#.
Is SST39VF401C-70-4I-EKE compatible with JEDEC-standard x16 flash interfaces?
Yes, SST39VF401C-70-4I-EKE conforms fully to JEDEC standard pinouts and command sets for x16 parallel flash memory. It supports standard read, word-program, sector/block/chip-erase, and software data protection sequences-enabling interoperability with existing flash controllers and BIOS/UEFI firmware stacks.
SST39VF401C-70-4I-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
SST39VF401C-70-4I-EKE FAQ
1.How can I place an order for SST39VF401C-70-4I-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4I-EKE 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-70-4I-EKE reliable?
The price and inventory of SST39VF401C-70-4I-EKE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF401C-70-4I-EKE is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4I-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4I-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4I-EKE?
SST39VF401C-70-4I-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4I-EKE 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-70-4I-EKE?
For technical support, including SST39VF401C-70-4I-EKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF401C-70-4I-EKE requirements.
6.How does Aetrix verify that SST39VF401C-70-4I-EKE is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4I-EKE 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-70-4I-EKE meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4I-EKE?
All SST39VF401C-70-4I-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4I-EKE, 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-70-4I-EKE part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4I-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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