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Microchip Technology SST39VF402C-70-4C-EKE-T
- Part No.:
- SST39VF402C-70-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF402C-70-4C-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,639
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Product details
Overview
SST39VF402C-70-4C-EKE-T from Microchip Technology is a 4 Mbit (256K × 16) Multi-Purpose Flash Plus (MPF+) memory IC with SuperFlash® technology, designed for embedded program/data 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 top 8 KWord boot sector, and features erase-suspend/resume capability for real-time firmware updates.
For engineers reviewing the SST39VF402C-70-4C-EKE-T datasheet, SST39VF402C-70-4C-EKE-T pinout, SST39VF402C-70-4C-EKE-T application, or SST39VF402C-70-4C-EKE-T equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, SuperFlash® endurance and retention specs, and validated alternative flash parts for industrial firmware storage designs.
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 cycle count-eliminating software de-rating. It uses standard JEDEC x16 parallel interface timing with CE#/OE#/WE# control logic and supports three software status detection methods: Data# Polling (DQ7), Toggle Bit (DQ6/DQ2), and open-drain RY/BY#.
The SST39VF402C-70-4C-EKE-T integrates hardware block protection on the top 8 KWord (0x3E000–0x3FFFF), a dedicated RST# reset input, WP#-controlled boot-sector lock, and 128-bit factory/user Security ID space. Its Auto Low Power mode reduces active read current from 5 mA to 3 µA after valid access, with no access 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 addressable storage space |
| Read Access Time | 70 ns maximum - enables direct interfacing with 14 MHz bus clocks 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 - 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 Architecture | Top-boot configuration: one 8 KWord + two 4 KWord + one 16 KWord + seven 32 KWord blocks - matches BIOS/bootloader partitioning requirements |
| Security ID | 128-bit factory-programmed + 128-word user-programmable space - enables secure device authentication and traceability |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, JEDEC-standard x16 parallel interface.
| 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 |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select - device enters standby (3 µA) when high |
| OE# | Output Enable | Active-low output gate - controls data bus drive during read; does not affect internal state |
| WE# | Write Enable | Active-low write strobe - latches address/data on falling/rising edges per JEDEC command protocol |
| WP# | Write Protect | Active-low hardware lock for top 8 KWord boot block - prevents accidental erase/program when grounded |
| RST# | Reset Input | Active-low hardware reset - forces immediate return to read mode, aborting any in-progress operation |
| RY/BY# | Ready/Busy# | Open-drain status indicator - low during program/erase; requires external 10–100 kΩ pull-up |
| VDD | Power Supply | 2.7–3.6 V supply - powers all core and I/O circuits; internal VPP generation eliminates external high-voltage requirement |
| VSS | Ground | Reference ground for all signals and power domains |
| NC | No Connection | Unbonded pins - must remain floating; no electrical or thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during background erase - critical for fail-safe bootloader operation |
| SuperFlash® Fixed Timing | 7 µs word-program and 18 ms sector-erase times remain constant across full 100,000-cycle lifetime - removes need for dynamic timeout scaling in firmware |
| Hardware Boot Block Protection | Top 8 KWord (0x3E000–0x3FFFF) locked via WP# pin - safeguards boot code against corruption during field updates |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access - cuts power in intermittently polled firmware storage |
| Security ID Space | Factory-programmed 128-bit ID + 128-word user space - enables cryptographic binding and anti-cloning in certified devices |
| CFI Compliance | Supports Common Flash Interface query mode (0x555H/0x98H) - enables OS-agnostic flash drivers and universal programming tools |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh EMI environments with infrequent but critical field upgrades. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; accessed via parallel x16 bus with deterministic 70 ns read latency. Use Value: Top-boot hardware protection prevents corruption of startup routines during partial reflash; 100-year retention ensures firmware integrity over equipment lifetime. |
Use Scenario: Holding calibrated sensor coefficients and regulatory-compliant device configuration parameters in FDA-cleared diagnostic instruments requiring audit-trail-capable storage. IC Role / Device Role / Timing Role: Secure configuration store with factory-locked Security ID and user-programmable parameter space; accessed via microcontroller's memory-mapped I/O. Use Value: 128-bit factory ID enables device serialization and traceability; erase-suspend allows safe parameter updates mid-measurement without interrupting analog acquisition. |
| Automotive Body Control Module (BCM) | Networking Equipment Bootloader Storage |
Use Scenario: Hosting boot code and calibration tables in automotive BCMs subjected to wide temperature (-40°C to +105°C) and vibration stress. IC Role / Device Role / Timing Role: JEDEC-standard x16 flash memory interfaced to 16-bit MCU bus; operates across full industrial voltage range (2.7–3.6 V). Use Value: SuperFlash® reliability (100,000 cycles, >100 yr retention) meets AEC-Q100 stress requirements; RST# pin enables hard reset recovery from bus faults. |
Use Scenario: Storing primary bootloader and recovery image in enterprise switches/routers where firmware integrity must survive power loss during update. IC Role / Device Role / Timing Role: Dual-boot flash with top-boot protected region holding immutable recovery code; accessed via CPU's parallel memory controller. Use Value: Hardware WP# lock on top 8 KWord guarantees recovery path remains intact; chip-erase (40 ms) enables fast factory reset without external programmer. |
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-70-4C-EKE | Same die, identical specs, but shipped in tape-and-reel without ESD packaging - lower cost for high-volume SMT lines | No ESD-safe tube; requires controlled handling environment | Select when production volume justifies ESD process controls and reel feeding |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns access, 2.7–3.6 V, but uses different command set (no CFI support) and lacks Security ID or erase-suspend | Requires custom driver development; no hardware boot-block lock - relies on software protection only | Select only if legacy design compatibility mandates Macronix pinout and timing, and security features are unnecessary |
Compared with SST39VF402C-70-4C-EKE-T, the -EKE variant trades ESD-safe packaging for reel efficiency, while MX29LV400CTTI-70G sacrifices SuperFlash® reliability features and security for broader legacy toolchain support - making SST39VF402C-70-4C-EKE-T optimal for new designs requiring field-upgrade safety and traceability.
Availability
SST39VF402C-70-4C-EKE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, automotive body control modules, networking equipment bootloader storage, and embedded system boot code applications requiring stable component supply across extended product lifecycles.
Supply support for SST39VF402C-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with leadership in embedded control and secure connectivity.
SST39VF402C-70-4C-EKE-T belongs to Microchip's SuperFlash® Multi-Purpose Flash Plus family, engineered for reliable, low-power, field-upgradable firmware and configuration storage in industrial, automotive, and medical systems.
FAQ
What is the boot block configuration of SST39VF402C-70-4C-EKE-T?
The SST39VF402C-70-4C-EKE-T implements top-boot architecture, protecting the upper 8 KWord (0x3E000–0x3FFFF) via hardware WP# pin. This matches BIOS and bootloader storage requirements where critical startup code resides at the highest address. The SST39VF401C variant uses bottom-boot instead; SST39VF402C-70-4C-EKE-T is not interchangeable without firmware address remapping.
Does SST39VF402C-70-4C-EKE-T support CFI (Common Flash Interface)?
Yes, SST39VF402C-70-4C-EKE-T supports CFI Query mode via the standard 0x555H/0x98H command sequence. This enables generic flash drivers to auto-detect device geometry, timing, and command sets - simplifying integration into Linux MTD or U-Boot environments without vendor-specific code.
How does the Auto Low Power mode function in SST39VF402C-70-4C-EKE-T?
In SST39VF402C-70-4C-EKE-T, Auto Low Power mode activates automatically after a valid read cycle, reducing active current from 5 mA to 3 µA. It exits instantly on any address or control signal transition with zero access penalty. This feature is ideal for battery-backed or energy-sensitive applications where flash is polled infrequently but must respond rapidly when needed.
Can SST39VF402C-70-4C-EKE-T be used in place of SST39VF401C?
No - SST39VF402C-70-4C-EKE-T and SST39VF401C have opposite boot block configurations (top vs. bottom) and non-overlapping protected address ranges. Swapping them without modifying firmware address mapping will expose protected regions to unintended writes or prevent access to boot code, risking system failure.
What is the purpose of the Security ID feature in SST39VF402C-70-4C-EKE-T?
The Security ID in SST39VF402C-70-4C-EKE-T provides a 128-bit factory-programmed identifier plus 128 words of user-programmable space. It enables device-level authentication, secure firmware binding, and production traceability - critical for regulated industries like medical and industrial automation where counterfeit prevention and audit compliance are mandatory.
SST39VF402C-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
SST39VF402C-70-4C-EKE-T FAQ
1.How can I place an order for SST39VF402C-70-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF402C-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 SST39VF402C-70-4C-EKE-T reliable?
The price and inventory of SST39VF402C-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 SST39VF402C-70-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF402C-70-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF402C-70-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF402C-70-4C-EKE-T?
SST39VF402C-70-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF402C-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 SST39VF402C-70-4C-EKE-T?
For technical support, including SST39VF402C-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 SST39VF402C-70-4C-EKE-T requirements.
6.How does Aetrix verify that SST39VF402C-70-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF402C-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 SST39VF402C-70-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF402C-70-4C-EKE-T?
All SST39VF402C-70-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF402C-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 SST39VF402C-70-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF402C-70-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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