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Microchip Technology SST39VF402C-70-4C-EKE
- Part No.:
- SST39VF402C-70-4C-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF402C-70-4C-EKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,817
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Product details
Overview
SST39VF402C-70-4C-EKE from Microchip is a 4 Mbit (256K × 16) Multi-Purpose Flash Plus (MPF+) memory IC with SuperFlash® technology, designed for embedded firmware and configuration storage in industrial controllers and communication modules. It operates at 2.7–3.6 V, delivers 70 ns read access time, supports hardware block protection on the top 8 KWord boot sector, and features erase-suspend/resume capability for real-time system responsiveness.
For engineers reviewing the SST39VF402C-70-4C-EKE datasheet, SST39VF402C-70-4C-EKE pinout, SST39VF402C-70-4C-EKE application, or SST39VF402C-70-4C-EKE equivalent, key selection criteria include boot-block architecture (top-protected), JEDEC-compliant x16 parallel interface, 100,000-cycle endurance, and support for software data protection command sequences.
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 flash technologies where timing degrades over endurance life. Its command-set compliance with JEDEC standard pinouts and protocols ensures interoperability with legacy x16 microprocessor buses.
The SST39VF402C-70-4C-EKE integrates dual status detection (DQ6 toggle bit and DQ7 data# polling), an open-drain RY/BY# output, and hardware write protection via WP# to prevent inadvertent modification of the top boot block (3E000H–3FFFFH). It also supports CFI query mode for runtime device identification and parameter discovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization); enables compact firmware storage without external data bus widening. |
| Read Access Time | 70 ns max; supports direct interfacing with 14 MHz microcontrollers without wait states. |
| Supply Voltage | 2.7–3.6 V; compatible with single-supply 3.3 V systems and tolerant of brown-out conditions down to 2.7 V. |
| Endurance | 100,000 program/erase cycles; sufficient for field-upgradable firmware with infrequent updates. |
| Data Retention | >100 years; guarantees long-term reliability in unpowered storage for industrial deployments. |
| Block Protection | Hardware top-boot protection (8 KWord, 3E000H–3FFFFH); prevents accidental overwrite of bootloader code. |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32 KWord, one 16 KWord, two 4 KWord, one 8 KWord); enables granular update management. |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K × 16 addressing; AMS = A17 for sector/block selection during erase. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during writes; tri-stated when CE# or OE# is 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 read cycles only. |
| WE# | Write Enable | Active-low write strobe; latches data/address and initiates internal program/erase command sequences. |
| WP# | Write Protect | Active-low hardware lock for top boot block; grounded to prevent program/erase of 3E000H–3FFFFH region. |
| RST# | Reset | Active-low hardware reset; forces return to read mode and aborts in-progress operations within TRP. |
| RY/BY# | Ready/Busy# | Open-drain status output; pulled low during program/erase; requires external 10–100 kΩ pull-up. |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash® array; internal VPP generation eliminates external pump. |
| VSS | Ground | System reference ground; two dedicated pins ensure stable return path for I/O and core currents. |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during active erase, enabling background firmware updates without halting system operation. |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access, cutting dynamic power by >99% in burst-read applications. |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space, locked permanently to prevent tampering or cloning. |
| Software Data Protection | JEDEC-standard 3-byte (program) and 6-byte (erase) command sequences prevent spurious writes during power transitions. |
| CFI Query Support | Enables runtime interrogation of device parameters (voltage ranges, timeout values, command sets) without external documentation lookup. |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped directly to microcontroller address space; accessed via parallel x16 bus with 70 ns timing. Use Value: Top-boot hardware protection ensures bootloader integrity across 100,000 field updates; erase-suspend allows diagnostics during firmware patching. |
Use Scenario: Holding RF calibration tables and protocol stack configuration data in 4G/LTE base station radio units. IC Role / Device Role / Timing Role: Configuration memory accessed during boot and runtime reconfiguration; leverages CFI query for adaptive parameter loading. Use Value: Uniform 2 KWord sectors enable atomic updates of individual calibration bands; 100-year retention avoids recalibration drift in sealed outdoor enclosures. |
| Medical Imaging Bootloader | Automotive Infotainment OS Image |
Use Scenario: Securing primary bootloader code in FDA-cleared diagnostic imaging equipment requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Read-only boot memory with hardware WP# lock; verified via Security ID factory signature during power-on self-test. Use Value: Factory-programmed 128-bit ID provides cryptographic binding to OEM firmware images; prevents unauthorized replacement or counterfeiting. |
Use Scenario: Storing upgradable Linux kernel and root filesystem images in automotive head units with OTA update capability. IC Role / Device Role / Timing Role: Dual-bank capable flash memory supporting A/B partitioning; uses block-erase for fast, reliable image swaps. Use Value: Flexible block architecture (32 KWord blocks) enables sub-second firmware rollback; 2.7 V min operation ensures functionality during cold-cranking voltage dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF401C-70-4C-EKE | Bottom-boot architecture (protects 00000H–01FFFH); identical timing, voltage, and command set. | Used where bootloader resides in lowest memory region instead of top; not interchangeable without firmware address remapping. | Select only if system design allocates boot code to bottom 8 KWord; pinout and interface are identical. |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6 V; lacks erase-suspend and Security ID; uses different command sequence (AMD-style). | Requires driver rewrite for erase/program commands; no hardware top-boot protection; unsuitable for secure bootloader storage. | Consider for cost-sensitive, non-security-critical applications where CFI compatibility and suspend capability are not required. |
Compared with SST39VF402C-70-4C-EKE, SST39VF401C-70-4C-EKE offers identical performance but inverted boot-block location, while MX29LV400CTTI-70G sacrifices security and real-time flexibility for lower unit cost and broader second-source availability.
Availability
SST39VF402C-70-4C-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, medical imaging bootloaders, and automotive infotainment OS image storage requiring stable component supply across multi-year production cycles.
Supply support for SST39VF402C-70-4C-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 acquired Silicon Storage Technology (SST) in 2016 and now manufactures and supports the SuperFlash® family of flash memory devices.
The SST39VF402C-70-4C-EKE belongs to Microchip's Multi-Purpose Flash Plus product line, engineered specifically for embedded systems requiring robust, low-voltage, high-endurance nonvolatile storage with integrated security and real-time operational flexibility.
FAQ
What is the boot-block configuration of SST39VF402C-70-4C-EKE?
The SST39VF402C-70-4C-EKE implements top-boot hardware block protection, safeguarding the upper 8 KWord (3E000H–3FFFFH) from accidental program or erase operations when WP# is grounded. This matches its device ID 2322H and distinguishes it from the bottom-boot SST39VF401C variant. The protected region is fixed and cannot be reconfigured in hardware.
Does SST39VF402C-70-4C-EKE support erase-suspend during active programming?
No - erase-suspend applies only to Sector-Erase and Block-Erase operations, not Word-Program. The SST39VF402C-70-4C-EKE allows suspension of ongoing erases to read or program other non-suspended sectors, but Word-Program operations execute atomically and cannot be interrupted. Erase-suspend is initiated using command B0H and resumes with 30H.
How is the Security ID implemented in SST39VF402C-70-4C-EKE?
The SST39VF402C-70-4C-EKE includes a 136-word Security ID space: the first 8 words (128 bits) are factory-programmed and permanently locked; the remaining 128 words are user-programmable via the Security ID Word-Program command (A5H). Once locked with command 85H, the user segment becomes read-only and immune to overwrite - critical for anti-cloning in medical and automotive designs.
What voltage range does SST39VF402C-70-4C-EKE require for full functionality?
The SST39VF402C-70-4C-EKE operates across 2.7–3.6 V for both read and write (program/erase) functions. Below 2.7 V, write operations are inhibited by internal VDD detection circuitry; above 3.6 V risks damage. This single-supply range eliminates need for separate VPP programming voltage - all internal high-voltage generation is handled on-chip.
Can SST39VF402C-70-4C-EKE be used as a drop-in replacement for SST39VF401C-70-4C-EKE?
No - although pinout, timing, and command set are identical, SST39VF402C-70-4C-EKE protects the top boot block (3E000H–3FFFFH) while SST39VF401C-70-4C-EKE protects the bottom (00000H–01FFFH). Swapping them without firmware address remapping risks corrupting bootloader code or failing security checks tied to protected region contents.
SST39VF402C-70-4C-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
SST39VF402C-70-4C-EKE FAQ
1.How can I place an order for SST39VF402C-70-4C-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF402C-70-4C-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 SST39VF402C-70-4C-EKE reliable?
The price and inventory of SST39VF402C-70-4C-EKE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF402C-70-4C-EKE is usually 5 days.
3.What payment methods are accepted for SST39VF402C-70-4C-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF402C-70-4C-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF402C-70-4C-EKE?
SST39VF402C-70-4C-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF402C-70-4C-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 SST39VF402C-70-4C-EKE?
For technical support, including SST39VF402C-70-4C-EKE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF402C-70-4C-EKE requirements.
6.How does Aetrix verify that SST39VF402C-70-4C-EKE is sourced from the original manufacturer or authorized distributors?
All SST39VF402C-70-4C-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 SST39VF402C-70-4C-EKE meets industry standards.
7.What is the process for return or replacement of SST39VF402C-70-4C-EKE?
All SST39VF402C-70-4C-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF402C-70-4C-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 SST39VF402C-70-4C-EKE part is unused and in its original packaging.
Return procedure for SST39VF402C-70-4C-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39VF402C-70-4C-EKE Tags
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