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Microchip Technology SST39VF6401B-70-4C-EKE-T
- Part No.:
- SST39VF6401B-70-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF6401B-70-4C-EKE-T.pdf
- Description:
- IC FLASH 64MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,280
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Product details
Overview
SST39VF6401B-70-4C-EKE-T from Microchip is a 64 Mbit (4M × 16) CMOS Multi-Purpose Flash Plus memory IC with bottom-block hardware write protection, 70 ns read access time, 2.7–3.6 V single-supply operation, and JEDEC-standard x16 asynchronous interface - used for firmware storage and configuration in embedded controllers and industrial HMI systems.
For engineers reviewing the SST39VF6401B-70-4C-EKE-T datasheet, SST39VF6401B-70-4C-EKE-T pinout, SST39VF6401B-70-4C-EKE-T application, or SST39VF6401B-70-4C-EKE-T equivalent, key selection considerations include bottom-boot block protection (000000H–007FFFH), 100,000-cycle endurance, 3 µA standby current, sector/block/chip erase flexibility, and TSOP-48 packaging compatibility with legacy x16 memory sockets.
Technical Context
The SST39VF6401B-70-4C-EKE-T implements SuperFlash split-gate technology enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of wear level. Its command-set architecture supports JEDEC-standard software data protection via three-byte unlock sequences and six-byte erase commands (e.g., 50H for sector, 30H for block).
Hardware protection is implemented via dedicated WP# pin enabling bottom 32 KWord block lock (000000H–007FFFH), while RST# provides hardware reset to read mode. The device uses toggle-bit (DQ6/DQ2) and data-polling (DQ7) for end-of-write detection and supports CFI query mode for automatic system identification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 Mbit (4M × 16 organization); supports 22-bit addressing (A0–A21) |
| Read Access Time | 70 ns max; enables direct execution from flash in 5 MHz microcontroller systems |
| Supply Voltage | 2.7–3.6 V single supply; compatible with 3.3 V logic rails without level shifters |
| Endurance | 100,000 program/erase cycles typical; sufficient for field firmware updates over 10+ years |
| Data Retention | >100 years at 85°C; ensures long-term reliability in unpowered industrial storage |
| Standby Current | 3 µA typical; reduces power budget in battery-backed or low-power sleep modes |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB); enables fine-grained firmware patching |
| Protection Scheme | Hardware bottom-block protection (000000H–007FFFH) + software data protection (SDP) |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm, standard x16 footprint). Pinout conforms to JEDEC MO-142AC standard for x16 flash memories.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A21 | Address Inputs | 22-bit address bus; A0–A10 used for sector selection (AMS-A11), A0–A14 for block (AMS-A15) |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during write; tri-state when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; must be low to enable read/write operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read cycles only |
| WE# | Write Enable | Active-low write control; latches address/data edges for command sequencing |
| WP# | Write Protect | Active-low hardware lock for bottom 32 KWord boot block (000000H–007FFFH) |
| RST# | Reset | Active-low hardware reset; forces return to read mode and aborts ongoing erase/program |
| VDD / VSS | Power / Ground | Single 2.7–3.6 V supply; decoupling required per JEDEC layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 7 µs program and 18 ms erase times across full lifetime |
| Bottom-Block Protection | Hardware lock on lowest 32 KWord (000000H–007FFFH) prevents accidental overwrite of bootloader code |
| Erase-Suspend/Resume | Allows temporary read access during erase; supports real-time diagnostics without halting firmware update |
| Security ID Space | 256-bit factory/user programmable ID (128-bit locked Microchip ID + 128-bit customer space) |
| CFI Compliance | JEDEC JESD68-compliant query table enables automatic system detection and driver initialization |
| Auto Low Power Mode | Reduces active read current from 9 mA to 3 µA after valid access; no timing penalty on wake-up |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped directly to CPU address space; accessed via x16 asynchronous bus with 70 ns timing. Use Value: Bottom-block protection prevents corruption of critical startup routines during remote firmware upgrades over Modbus TCP. | Use Scenario: Holding calibration parameters, safety thresholds, and regulatory configuration data in FDA-cleared diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration store with 100-year data retention; accessed during boot and runtime via memory-mapped I/O. Use Value: Security ID feature enables traceable device authentication; hardware WP# ensures immutable safety-critical settings. |
| Automotive Infotainment Bootloader | Networking Equipment Image Storage |
Use Scenario: Hosting primary bootloader code in automotive head units requiring AEC-Q100-compliant components. IC Role / Device Role / Timing Role: Bottom-boot flash memory providing fast, deterministic read access for secure boot verification. Use Value: 100,000-cycle endurance supports frequent OTA updates; 2.7–3.6 V range accommodates automotive battery transients. | Use Scenario: Storing dual firmware images and recovery partitions in enterprise switches and routers. IC Role / Device Role / Timing Role: Dual-image storage with sector-erase capability enabling atomic firmware swaps without downtime. Use Value: Uniform 4 KB sectors allow precise partitioning; erase-suspend enables background image validation during active traffic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF6402B-70-4C-EKE-T | Top-block protection (3F8000H–3FFFFFH) instead of bottom-block; otherwise identical timing, density, and command set | Used where bootloader resides in top memory region; incompatible pin-for-pin replacement due to different protected address range | Select SST39VF6402B-70-4C-EKE-T only if top-boot architecture matches system design |
| SST38VF6401-70-4C-EKE-T | Newer generation with same 64 Mbit density but enhanced reliability, lower 2.3–3.6 V voltage range, and improved ESD tolerance | Recommended for new designs per Microchip; supports same TSOP-48 footprint but requires updated command timing margins | SST38VF6401-70-4C-EKE-T is Microchip's designated successor; migration requires validation of VDD min and timing parameters |
Compared with SST39VF6401B-70-4C-EKE-T, SST39VF6402B-70-4C-EKE-T offers inverted block protection targeting top-boot systems, while SST38VF6401-70-4C-EKE-T delivers extended voltage range and lifecycle support - both require board-level validation despite shared package and pinout.
Availability
SST39VF6401B-70-4C-EKE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment bootloader applications requiring stable component supply across extended product lifecycles.
Supply support for SST39VF6401B-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and nonvolatile memory solutions for industrial, automotive, and communications markets.
The SST39VF6401B-70-4C-EKE-T belongs to Microchip's legacy Multi-Purpose Flash Plus (MPF+) product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring robust firmware and configuration storage with hardware-based data protection.
FAQ
What does the "B" suffix in SST39VF6401B-70-4C-EKE-T indicate?
The "B" in SST39VF6401B-70-4C-EKE-T denotes the second revision of the SST39VF6401 product family, incorporating minor electrical and reliability enhancements over the original "A" version - including tighter parameter distributions and improved ESD robustness. All command sequences, pinout, and functional behavior remain fully backward-compatible with SST39VF6401A devices.
Is SST39VF6401B-70-4C-EKE-T pin-compatible with SST39VF6402B-70-4C-EKE-T?
Yes, SST39VF6401B-70-4C-EKE-T and SST39VF6402B-70-4C-EKE-T share identical 48-lead TSOP packaging, pin assignments, and electrical signaling - but differ in hardware protection mapping: SST39VF6401B-70-4C-EKE-T protects the bottom 32 KWord block (000000H–007FFFH), while SST39VF6402B-70-4C-EKE-T protects the top block (3F8000H–3FFFFFH). Swapping them requires firmware address remapping.
Does SST39VF6401B-70-4C-EKE-T support CFI (Common Flash Interface)?
Yes, SST39VF6401B-70-4C-EKE-T fully supports JEDEC JESD68 CFI specification. Entering CFI Query mode via the 555H/AAH/2AAH/55H/555H/98H command sequence returns standardized geometry, timing, and command-set descriptors at predefined addresses (e.g., 0010H–0012H for "QRY", 0027H–0028H for VDD range), enabling automatic driver initialization in BIOS and embedded OS loaders.
What is the function of the RST# pin on SST39VF6401B-70-4C-EKE-T?
The RST# pin on SST39VF6401B-70-4C-EKE-T provides hardware-initiated reset to read mode: holding RST# low for ≥100 ns (TRP) terminates any active program or erase operation and restores normal read functionality. After release, a minimum 100 ns (TRHR) hold time is required before valid reads resume. This pin is essential for system recovery after power glitches or watchdog timeouts.
How does hardware write protection work on SST39VF6401B-70-4C-EKE-T?
Hardware write protection on SST39VF6401B-70-4C-EKE-T is controlled by the WP# pin: when grounded, it permanently locks the bottom 32 KWord boot block (000000H–007FFFH) against all program and erase commands. If left floating, an internal pull-up holds WP# high, disabling protection. This mechanism operates independently of software data protection and cannot be overridden by command sequences.
SST39VF6401B-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:
- 64Mbit
- Memory Organization:
- 4M 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
SST39VF6401B-70-4C-EKE-T FAQ
1.How can I place an order for SST39VF6401B-70-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T reliable?
The price and inventory of SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF6401B-70-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF6401B-70-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF6401B-70-4C-EKE-T?
SST39VF6401B-70-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T?
For technical support, including SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T requirements.
6.How does Aetrix verify that SST39VF6401B-70-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF6401B-70-4C-EKE-T?
All SST39VF6401B-70-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF6401B-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 SST39VF6401B-70-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF6401B-70-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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