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Microchip Technology SST39VF401C-70-4C-B3KE-T
- Part No.:
- SST39VF401C-70-4C-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF401C-70-4C-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,878
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Product details
Overview
SST39VF401C-70-4C-B3KE-T 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 industrial controllers and legacy system upgrades. 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 for real-time interruptible updates.
For engineers reviewing the SST39VF401C-70-4C-B3KE-T datasheet, SST39VF401C-70-4C-B3KE-T pinout, SST39VF401C-70-4C-B3KE-T application, or SST39VF401C-70-4C-B3KE-T equivalent, this page provides verified package mapping (48-ball WFBGA), JEDEC-compliant x16 interface timing, boot-block protection behavior, and direct alternatives with documented sector/block architecture differences.
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 over lifetime. Its command-set follows JEDEC-standard x16 flash protocols, including six-byte erase sequences and three-byte program initiation.
It integrates dual status detection (DQ7 Data# Polling and DQ6 Toggle Bit), open-drain RY/BY# output with external pull-up requirement, and hardware write protection via WP# tied to bottom boot block. The 48-ball WFBGA (4 mm × 6 mm) package conforms to JEDEC MO-245, with pin-compatible layout across VF/LF variants in same footprint family.
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 maximum - enables direct connection to 14 MHz bus without wait states |
| Supply Voltage | 2.7–3.6 V - supports single-supply operation in battery-backed or low-voltage industrial systems |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years at 27x/year |
| Data Retention | Greater than 100 years - validated under JEDEC JESD22-A117 stress conditions |
| Block Protection | Hardware bottom 8 KWord (00000H–01FFFH) - prevents accidental overwrite of bootloader code |
| Package | 48-ball WFBGA (4 mm × 6 mm, 0.5 mm pitch) - optimized for high-density PCB layouts |
Pinout & Package
48-ball WFBGA (4 mm × 6 mm, ball pitch 0.5 mm), JEDEC MO-245 compliant, top-side marking includes "B3KE" indicating WFBGA package and commercial temperature grade (0°C to +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word 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; no effect during write |
| 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; floating = unprotected (internal pull-up) |
| RST# | Reset | Active-low hardware reset - forces return to read mode, aborts in-progress erase/program |
| RY/BY# | Ready/Busy# | Open-drain status indicator - requires 10–100 kΩ pull-up; low = operation in progress |
| VDD | Power Supply | 2.7–3.6 V core supply; powers all logic and SuperFlash® array operations |
| VSS | Ground | Reference ground for all I/O and core circuitry; two dedicated balls for low-noise routing |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access from non-suspended sectors during active erase - critical for watchdog-safe firmware updates |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid read - eliminates need for external power gating logic |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment - enables secure device authentication and version tracking |
| Uniform Sector Architecture | 256 uniform 2 KWord sectors - simplifies file system wear-leveling and partition management in host firmware |
| JEDEC Pinout Compliance | Fully compatible with standard x16 parallel flash sockets - enables drop-in replacement in existing designs using JEDEC 48-pin TSOP footprints (with adapter) |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O configuration tables in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code executed by ARM Cortex-M3 microcontroller at power-on. Use Value: Bottom boot block protection prevents corruption of bootloader during field firmware updates via RS-485; 100-year retention ensures reliability across equipment lifecycle. |
Use Scenario: Replacing obsolete EPROMs in medical diagnostic instruments requiring field-upgradable calibration data. IC Role / Device Role / Timing Role: x16 parallel interface flash replacing 27C040 EPROM in ISA-bus-based subsystems. Use Value: 70 ns access time matches original EPROM timing; WFBGA package allows retrofit into space-constrained PCBs using rework stencil. |
| Point-of-Sale Terminal Configuration | Telecom Line Card Parameter Storage |
Use Scenario: Holding localized language packs, tax tables, and payment gateway keys in retail POS terminals deployed globally. IC Role / Device Role / Timing Role: Secure configuration store accessed by Linux-based application processor via memory-mapped GPIO-controlled bus. Use Value: Security ID feature enables cryptographic binding of firmware image to hardware; sector-erase capability permits selective update of regional parameters without full reflash. |
Use Scenario: Storing DSP coefficient sets and line-provisioning profiles in carrier-grade DSLAM line cards operating in temperature-controlled cabinets. IC Role / Device Role / Timing Role: High-reliability parameter memory interfaced to TI C64x+ DSP via EMIF with asynchronous timing. Use Value: 100,000-cycle endurance exceeds telecom GR-468 qualification requirements; auto low-power mode reduces thermal load in densely packed chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4C-B3KE-T | Top 8 KWord boot block protection (3E000H–3FFFFH); identical timing, voltage, and package | Designed for systems where bootloader resides in upper memory region - not interchangeable without address map revision | Select only if your design uses top-boot architecture and requires identical WFBGA footprint |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6 V supply; lacks erase-suspend and security ID; uses different command set (AMD-style) | No hardware boot-block protection; requires firmware driver rewrite for command compatibility | Choose for cost-sensitive replacements where erase-suspend and security features are unused |
Compared with SST39VF401C-70-4C-B3KE-T, the SST39VF402C variant shifts protected boot sector location but retains identical performance and packaging, while the MX29LV400CTTI requires full software adaptation due to non-JEDEC command structure and missing suspend/resume functionality.
Availability
SST39VF401C-70-4C-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system boot memory, and point-of-sale terminal configuration requiring stable component supply across extended product lifecycles.
Supply support for SST39VF401C-70-4C-B3KE-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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2016 to expand its serial and parallel flash portfolio.
SST39VF401C-70-4C-B3KE-T belongs to the Multi-Purpose Flash Plus (MPF+) product line, engineered specifically for reliable, low-voltage firmware and configuration storage in industrial, telecom, and medical equipment where long-term data integrity and field-upgradability are critical.
FAQ
What is the boot block protection scheme for SST39VF401C-70-4C-B3KE-T?
SST39VF401C-70-4C-B3KE-T implements hardware bottom boot block protection on the lowest 8 KWord (00000H–01FFFH). When WP# is driven low, program and erase operations to this region are disabled. If WP# is left floating, an internal pull-up keeps it high, leaving the boot block unprotected - a deliberate design allowing flexible factory programming before final system integration.
Does SST39VF401C-70-4C-B3KE-T support erase-suspend during active firmware updates?
Yes, SST39VF401C-70-4C-B3KE-T supports Erase-Suspend and Erase-Resume commands (B0H and 30H). This allows a host processor to pause an ongoing sector or block erase, read status or execute critical code from non-suspended regions, then resume the erase - essential for maintaining system responsiveness during field updates.
What package type is used for SST39VF401C-70-4C-B3KE-T?
SST39VF401C-70-4C-B3KE-T uses a 48-ball WFBGA package measuring 4 mm × 6 mm with 0.5 mm ball pitch (JEDEC MO-245). The "B3KE" suffix explicitly denotes this WFBGA variant with commercial temperature range (0°C to +70°C) and lead-free finish.
How does SST39VF401C-70-4C-B3KE-T indicate completion of a program or erase operation?
SST39VF401C-70-4C-B3KE-T provides three concurrent status mechanisms: DQ7 Data# Polling (complement-to-data toggle), DQ6 Toggle Bit (alternating 1/0), and open-drain RY/BY# output. All are valid after defined WE# edges - DQ7/DQ6 require no external components, while RY/BY# needs a 10–100 kΩ pull-up resistor to VDD for proper logic-level transition.
Is SST39VF401C-70-4C-B3KE-T pin-compatible with SST39VF402C-70-4C-B3KE-T?
Yes, SST39VF401C-70-4C-B3KE-T and SST39VF402C-70-4C-B3KE-T share identical pinout, timing, voltage, and package - differing only in boot block location (bottom vs. top) and associated protection address range. Hardware substitution is physically possible, but firmware must be validated for correct boot sector addressing.
SST39VF401C-70-4C-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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-TFBGA (6x8)
SST39VF401C-70-4C-B3KE-T FAQ
1.How can I place an order for SST39VF401C-70-4C-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4C-B3KE-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-B3KE-T reliable?
The price and inventory of SST39VF401C-70-4C-B3KE-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-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4C-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4C-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4C-B3KE-T?
SST39VF401C-70-4C-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4C-B3KE-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-B3KE-T?
For technical support, including SST39VF401C-70-4C-B3KE-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-B3KE-T requirements.
6.How does Aetrix verify that SST39VF401C-70-4C-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4C-B3KE-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-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4C-B3KE-T?
All SST39VF401C-70-4C-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4C-B3KE-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-B3KE-T part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4C-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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