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Microchip Technology SST39VF401C-70-4C-B3KE
- Part No.:
- SST39VF401C-70-4C-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF401C-70-4C-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,694
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Product details
Overview
SST39VF401C-70-4C-B3KE 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 2.7–3.6 V, delivers 70 ns read access time, supports sector/block/chip erase, and features hardware write protection via WP# pin for bottom 8 KWord boot block (00000H–01FFFH).
For engineers reviewing the SST39VF401C-70-4C-B3KE datasheet, SST39VF401C-70-4C-B3KE pinout, SST39VF401C-70-4C-B3KE application, or SST39VF401C-70-4C-B3KE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, SuperFlash endurance/reliability data, and real-world use cases in industrial firmware storage and legacy BIOS replacement.
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-erase times independent of cycle count. It uses standard JEDEC x16 flash command sets (e.g., 6-byte erase sequences, 3-byte program unlock) and supports three software status detection methods: Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and open-drain RY/BY#.
Hardware protection includes bottom-boot block lock via WP# (active-low), RST# for hard reset to read mode, and noise/glitch immunity (<5 ns pulse rejection). The device enters Auto Low Power mode after valid read, reducing active current from 5 mA to 3 µA without access penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables 16-bit parallel data bus interfacing with MCUs and DSPs |
| Read Access Time | 70 ns (max); meets timing requirements for 14 MHz bus operation in legacy embedded controllers |
| Supply Voltage | 2.7–3.6 V; compatible with single-supply 3.3 V systems without level-shifting |
| Endurance | 100,000 program/erase cycles (typical); supports field firmware updates over 10+ years in industrial equipment |
| Data Retention | >100 years (typical); ensures long-term reliability in unpowered storage applications |
| Standby Current | 3 µA (typical); enables ultra-low-power sleep modes in battery-backed systems |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32K, one 16K, two 4K, one 8K); allows granular firmware patching |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm, 0.5 mm pitch), RoHS-compliant, optimized for high-density PCB layouts in space-constrained industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | Latched on falling edge of CE# or WE#; A17 is most significant address (AMS) for block selection during erase |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; tri-stated when CE# or OE# is high; latched internally during write |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus visibility during read cycles |
| WE# | Write Enable | Active-low control for program/erase command latching; rising edge initiates internal operation |
| WP# | Write Protect | Active-low hardware lock for bottom 8 KWord boot block (00000H–01FFFH); prevents accidental firmware corruption |
| RST# | Reset | Active-low hardware reset; forces immediate return to read mode, terminating in-progress operations |
| RY/BY# | Ready/Busy# | Open-drain status indicator; pulled low during program/erase; requires external 10–100 kΩ pull-up |
| VDD | Power Supply | 2.7–3.6 V supply; powers all internal logic and SuperFlash array |
| VSS | Ground | Reference ground for all signals and core circuitry |
| NC | No Connection | Unbonded pins (e.g., A13, A9, A10 in WFBGA layout); must be left floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector enables 100k-cycle endurance and >100-year data retention without performance degradation |
| Erase-Suspend/Resume | Allows temporary halt of sector/block erase to read other memory regions or program unprotected blocks, improving system responsiveness |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment, locked permanently to prevent tampering |
| CFI Compliance | Supports Common Flash Interface query mode (98H command) for automatic driver configuration in OS/bootloader environments |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access-no software overhead or timing penalty |
Applications
| Industrial PLC Firmware Storage | Legacy BIOS/UEFI Module Replacement |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to MCU address space; accessed via 16-bit parallel bus with 70 ns read latency. Use Value: Bottom-boot block protection prevents corruption of critical startup code during field firmware upgrades, ensuring system recoverability. |
Use Scenario: Replacing obsolete 28F-series flash in motherboard BIOS chips where pin-compatible x16 interface and JEDEC command set are required. IC Role / Device Role / Timing Role: Boot ROM replacement with identical TSOP/WFBGA footprint options and 70 ns access matching legacy timing budgets. Use Value: Direct drop-in compatibility with existing BIOS drivers due to CFI support and identical command sequence implementation. |
| Medical Device Configuration Memory | Automotive Telematics Log Storage |
Use Scenario: Storing calibration parameters and safety-critical configuration data in FDA-certified diagnostic equipment requiring long-term data integrity. IC Role / Device Role / Timing Role: EEPROM-replacement data storage with 100k-cycle endurance and >100-year retention, accessed via standard memory-mapped I/O. Use Value: Hardware WP# lock on bottom boot block secures factory-set calibration values against runtime overwrite during service mode. |
Use Scenario: Logging vehicle CAN bus diagnostics and GPS timestamps in telematics control units with limited power budget between ignition cycles. IC Role / Device Role / Timing Role: Low-power nonvolatile storage using Auto Low Power mode (3 µA standby) and fast 18 ms sector erase for rapid log rotation. Use Value: Energy-efficient erase/write reduces cumulative power draw during frequent logging, extending backup capacitor hold-up time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4C-B3KE | Top-boot block protection (3E000H–3FFFFH) instead of bottom-boot; otherwise identical voltage, timing, and package | Used where boot code resides in top memory region; not interchangeable without firmware address remapping | Select only if system firmware expects top-boot architecture and WP# protection targets upper 8 KWord |
| MX29LV400CTTI-70G | Same 4 Mbit x16 organization, 70 ns access, and 2.7–3.6 V range but uses different command set (no CFI support) and lacks Erase-Suspend | Requires custom driver adaptation; unsuitable for systems relying on CFI auto-detection or suspend/resume during logging | Choose only for cost-sensitive designs where driver porting effort is acceptable and suspend functionality is unnecessary |
Compared with SST39VF401C-70-4C-B3KE, SST39VF402C-70-4C-B3KE offers mirrored boot-block protection but identical performance, while MX29LV400CTTI-70G sacrifices CFI and Erase-Suspend for lower unit cost-making it viable only where those features are unused.
Availability
SST39VF401C-70-4C-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy BIOS replacement, medical device configuration memory, and automotive telematics log storage requiring stable component supply across extended product lifecycles.
Supply support for SST39VF401C-70-4C-B3KE 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 leading provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF401C-70-4C-B3KE belongs to Microchip's Multi-Purpose Flash Plus (MPF+) family, engineered for reliable, low-power, field-upgradable firmware and configuration storage in industrial, medical, and automotive embedded systems.
FAQ
What is the boot block protection scheme for SST39VF401C-70-4C-B3KE?
The SST39VF401C-70-4C-B3KE implements bottom-boot block hardware protection: when WP# is low, the lowest 8 KWord (00000H–01FFFH) is locked against program and erase operations. This matches Table 4 in the datasheet and ensures bootloader integrity. The SST39VF401C-70-4C-B3KE does not support top-boot protection-only SST39VF402C variants do.
Does SST39VF401C-70-4C-B3KE support CFI (Common Flash Interface)?
Yes, SST39VF401C-70-4C-B3KE supports CFI Query mode via the 98H command at address 555H or the 55H/89H one-byte sequence. Tables 8–10 in the datasheet confirm full CFI string ("QRY") and timing parameter reporting, enabling automatic driver initialization in Linux MTD or U-Boot environments without hardcoded timing values.
What is the purpose of the RY/BY# pin on SST39VF401C-70-4C-B3KE?
The RY/BY# pin on SST39VF401C-70-4C-B3KE is an open-drain ready/busy indicator: it pulls low during internal program or erase operations and goes high (via external pull-up) when complete. Unlike polling DQ7 or DQ6, RY/BY# provides hardware-level status without bus contention, allowing multiple devices to share a single interrupt line in multi-chip memory systems.
Can SST39VF401C-70-4C-B3KE operate at 2.5 V?
No, SST39VF401C-70-4C-B3KE requires a minimum supply voltage of 2.7 V for guaranteed read and write operation, as specified in the "Single Voltage Read and Write Operations" section. Operation below 2.7 V may result in failed program/erase cycles or data corruption, and is outside the validated operating range defined in DS20005053B.
How does the Auto Low Power mode function in SST39VF401C-70-4C-B3KE?
In SST39VF401C-70-4C-B3KE, Auto Low Power mode activates automatically after a valid read cycle completes, reducing active current from 5 mA to 3 µA. It exits instantly on any address or control signal transition-no delay or reinitialization needed. This feature is enabled by default and requires no software configuration, making it transparent to host firmware.
SST39VF401C-70-4C-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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-TFBGA (6x8)
SST39VF401C-70-4C-B3KE FAQ
1.How can I place an order for SST39VF401C-70-4C-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4C-B3KE 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-B3KE reliable?
The price and inventory of SST39VF401C-70-4C-B3KE 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-B3KE is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4C-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4C-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4C-B3KE?
SST39VF401C-70-4C-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4C-B3KE 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-B3KE?
For technical support, including SST39VF401C-70-4C-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF401C-70-4C-B3KE requirements.
6.How does Aetrix verify that SST39VF401C-70-4C-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4C-B3KE 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-B3KE meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4C-B3KE?
All SST39VF401C-70-4C-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4C-B3KE, 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-B3KE part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4C-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39VF401C-70-4C-B3KE Tags
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