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Microchip Technology SST39VF401C-70-4I-B3KE
- Part No.:
- SST39VF401C-70-4I-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF401C-70-4I-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,992
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Product details
Overview
SST39VF401C-70-4I-B3KE from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for nonvolatile program/data storage in embedded systems. It operates at 2.7–3.6 V, delivers 70 ns read access time, supports hardware block protection of the bottom 8 KWord boot sector, and features sector/block/chip erase with erase-suspend/resume capability.
For engineers reviewing the SST39VF401C-70-4I-B3KE datasheet, SST39VF401C-70-4I-B3KE pinout, SST39VF401C-70-4I-B3KE application, or SST39VF401C-70-4I-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 firmware-updatable industrial controllers and legacy BIOS modules.
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 microprocessor bus timing with latched address/data and supports three software status detection methods: Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and open-drain RY/BY#.
Hardware protection includes WP#-controlled bottom-boot-block lock (00000H–01FFFH), RST#-initiated hard reset to Read mode, and noise/glitch immunity on WE#/CE# pulses <5 ns. The device conforms to JEDEC-standard x16 flash pinouts and command sets, and integrates CFI Query mode for automatic system identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization); supports byte-wide or word-wide addressing via DQ15–DQ0. |
| Read Access Time | 70 ns (max); enables direct execution from flash (XIP) in 5 MHz–20 MHz microcontroller interfaces. |
| Supply Voltage | 2.7–3.6 V; single-supply operation compatible with 3.3 V logic rails without level shifting. |
| Endurance | 100,000 program/erase cycles (typical); sufficient for field firmware updates over 10+ years in industrial equipment. |
| Data Retention | >100 years (typical); ensures long-term reliability in unpowered storage applications like configuration EEPROM replacement. |
| Power Consumption | 5 mA active current (typ), 3 µA standby/auto-low-power mode; reduces system-level quiescent power in battery-backed modules. |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32 KWord, one 16 KWord, two 4 KWord, one 8 KWord); enables granular firmware patching. |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm, ball pitch 0.5 mm), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17; sector erase uses A11–A17, block erase uses A15–A17. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; tri-stated when CE# or OE# high; latched internally during write. |
| CE# | Chip Enable | Active-low chip select; must be low to enable read/write; controls address latch timing edge. |
| OE# | Output Enable | Active-low output gate; used with CE# to control data bus timing; high disables outputs. |
| WE# | Write Enable | Active-low write strobe; controls data latch timing edge and initiates command sequences. |
| WP# | Write Protect | Active-low hardware lock for bottom 8 KWord boot block (00000H–01FFFH); floating = unprotected. |
| RST# | Reset | Active-low hardware reset; terminates ongoing erase/program and forces return to Read mode. |
| RY/BY# | Ready/Busy# | Open-drain status indicator; low = internal operation in progress; requires external 10–100 kΩ pull-up. |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash array; no separate VPP required. |
| VSS | Ground | Reference ground for all signals and internal circuitry; two dedicated pins for low-noise operation. |
| NC | No Connection | Unbonded balls (A2, A1, A5, A6, A9, A10, A11, A13, A14, A15, A16, DQ2, DQ3, DQ13, DQ14, DQ15); must be left floating. |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during erase; critical for interrupt-driven firmware update routines. |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space; enables secure device authentication and traceability. |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid read; eliminates need for external power management logic. |
| JEDEC Standard Compliance | Pinout and command set match industry-standard x16 flash; ensures drop-in compatibility with existing BIOS/firmware drivers. |
| SuperFlash Reliability | Split-gate cell + thick-oxide injector yields >100-year data retention and stable timing across 100k cycles-no wear-leveling required. |
Applications
| Firmware Storage in Industrial PLCs | Legacy BIOS/UEFI Module |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and I/O configuration in programmable logic controllers operating in harsh environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware boot-block protection preventing accidental corruption of startup routines. Use Value: Bottom 8 KWord hardware lock (00000H–01FFFH) ensures bootloader integrity; 70 ns access enables deterministic scan-cycle timing. |
Use Scenario: Replacing older EPROM/EEPROM in PC motherboard BIOS chips requiring in-system reprogramming. IC Role / Device Role / Timing Role: x16 parallel interface flash memory supporting JEDEC-standard command set for legacy BIOS ROM emulation. Use Value: 256K × 16 organization matches standard 4 Mbit BIOS image size; CFI Query mode enables automatic firmware updater detection. |
| Embedded Controller Boot Memory | Medical Device Configuration Storage |
Use Scenario: Holding boot code and calibration tables in portable ultrasound or infusion pump controllers with strict power budget constraints. IC Role / Device Role / Timing Role: Primary boot memory accessed directly by ARM Cortex-M or MIPS-based MCU during cold start. Use Value: Auto Low Power mode cuts active read current to 3 µA; 100,000-cycle endurance supports lifetime calibration updates. |
Use Scenario: Storing FDA-mandated device parameters, usage logs, and safety-critical configuration data in Class II medical instruments. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage with Security ID for device serialization and audit trail binding. Use Value: Factory-programmed 128-bit ID + user-programmable 128-word space enables cryptographic binding of config data to hardware identity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4I-B3KE | Top-boot architecture (3E000H–3FFFFH protected); identical timing, voltage, and package. | Used where bootloader resides in top sector instead of bottom; not interchangeable without firmware address remapping. | Select only if system design requires top-sector hardware protection. |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6 V; lacks erase-suspend, Security ID, and auto-low-power mode. | Lower-cost alternative for static firmware storage without runtime update requirements. | Choose when erase-suspend, security, or ultra-low standby current are not needed. |
Compared with SST39VF401C-70-4I-B3KE, SST39VF402C-70-4I-B3KE offers top-boot protection but requires firmware address alignment changes, while MX29LV400CTTI-70G sacrifices advanced features for cost reduction in non-updatable applications.
Availability
SST39VF401C-70-4I-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware updates, legacy BIOS modules, and medical device configuration storage requiring stable component supply and long lifecycle support.
Supply support for SST39VF401C-70-4I-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 serial and parallel flash portfolio.
SST39VF401C-70-4I-B3KE belongs to the Multi-Purpose Flash Plus (MPF+) product line, engineered for reliable, low-voltage, high-endurance nonvolatile storage in resource-constrained embedded systems requiring field firmware updates.
FAQ
What is the boot-block protection scheme for SST39VF401C-70-4I-B3KE?
SST39VF401C-70-4I-B3KE implements bottom-boot hardware block protection covering address range 00000H–01FFFH (8 KWord). 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 and the boot block remains unprotected. This configuration ensures bootloader integrity in systems where startup code resides at the lowest memory addresses.
Does SST39VF401C-70-4I-B3KE require an external VPP voltage for programming?
No, SST39VF401C-70-4I-B3KE does not require an external VPP voltage. It generates all necessary high-voltage programming pulses internally using its on-chip charge pump. The device operates from a single 2.7–3.6 V supply for both read and write operations, simplifying power design and eliminating external high-voltage circuitry.
How is the Ready/Busy# (RY/BY#) signal used with SST39VF401C-70-4I-B3KE?
RY/BY# is an open-drain status output on SST39VF401C-70-4I-B3KE that goes low during internal program or erase operations and returns high when complete. It requires an external 10–100 kΩ pull-up resistor to VDD. Unlike polling methods, RY/BY# provides asynchronous hardware notification, enabling efficient interrupt-driven firmware update routines without CPU overhead.
Can SST39VF401C-70-4I-B3KE be used in place of SST39VF402C-70-4I-B3KE?
No, SST39VF401C-70-4I-B3KE and SST39VF402C-70-4I-B3KE are not interchangeable without firmware modification. SST39VF401C-70-4I-B3KE protects the bottom 8 KWord (00000H–01FFFH), while SST39VF402C-70-4I-B3KE protects the top 8 KWord (3E000H–3FFFFH). Swapping them risks corrupting the bootloader unless address mapping is adjusted in software.
What is the purpose of the Security ID feature in SST39VF401C-70-4I-B3KE?
The Security ID in SST39VF401C-70-4I-B3KE provides a 128-bit factory-programmed identifier plus 128 words of user-programmable space. It enables hardware-level device authentication, firmware binding, and traceability. Once the user segment is locked via the Security ID Program Lock-Out command, further writes are blocked-ensuring permanent, tamper-resistant device identity for regulated applications.
SST39VF401C-70-4I-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFBGA (6x8)
SST39VF401C-70-4I-B3KE FAQ
1.How can I place an order for SST39VF401C-70-4I-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4I-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-70-4I-B3KE reliable?
The price and inventory of SST39VF401C-70-4I-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-70-4I-B3KE is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4I-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4I-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4I-B3KE?
SST39VF401C-70-4I-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4I-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-70-4I-B3KE?
For technical support, including SST39VF401C-70-4I-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF401C-70-4I-B3KE requirements.
6.How does Aetrix verify that SST39VF401C-70-4I-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4I-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-70-4I-B3KE meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4I-B3KE?
All SST39VF401C-70-4I-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4I-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-70-4I-B3KE part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4I-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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