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Microchip Technology SST39VF1681-70-4I-EKE-T
- Part No.:
- SST39VF1681-70-4I-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF1681-70-4I-EKE-T.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,544
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Product details
Overview
SST39VF1681-70-4I-EKE-T from Microchip Technology is a 16 Mbit (2M × 8) Multi-Purpose Flash Plus memory IC with bottom-block hardware write protection, 70 ns read access time, and single 2.7–3.6 V supply operation. It implements SuperFlash® technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39VF1681-70-4I-EKE-T datasheet, SST39VF1681-70-4I-EKE-T pinout, SST39VF1681-70-4I-EKE-T application, or SST39VF1681-70-4I-EKE-T equivalent, key selection considerations include bottom-boot block protection (000000H–00FFFFH), JEDEC-compliant x8 asynchronous interface, sector/block/chip erase capabilities, and 100,000-cycle endurance with >100-year data retention.
Technical Context
The SST39VF1681-70-4I-EKE-T uses SST's proprietary split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports standard microprocessor bus timing with latched address/data and CMOS I/O compatibility.
It implements JEDEC-standard command sets for byte-program, sector-erase (4 KB), block-erase (64 KB), chip-erase, and erase-suspend/resume. Hardware protection is enforced via WP# pin grounding to lock the bottom 64 KB boot block, while RST# provides hardware reset to read mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 × 8 bits); supports full firmware image storage for mid-complexity microcontrollers. |
| Read Access Time | 70 ns; enables direct execution (XIP) from flash in systems with ≤14 MHz bus clocks. |
| Supply Voltage | 2.7–3.6 V; compatible with 3.3 V logic rails and tolerant of brown-out conditions down to 2.7 V. |
| Endurance | 100,000 program/erase cycles; sufficient for firmware updates over 10+ years in industrial control systems. |
| Data Retention | >100 years at 85°C; ensures long-term integrity of boot code and calibration data without refresh. |
| Erase Granularity | Uniform 4 KB sectors and 64 KB blocks; allows selective update of application partitions without full chip erase. |
| Write Protection | Hardware bottom-block protection (000000H–00FFFFH); prevents accidental overwrite of bootloader during field upgrades. |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS compliant, industrial temperature grade (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus; A20 is AMS (most significant address) for sector/block selection during erase commands. |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus; tri-stated when CE# or OE# is high; supports Data# Polling (DQ7) and Toggle Bit (DQ6/DQ2) status detection. |
| CE# | Chip Enable | Active-low device select; must be low to enable read/write operations; controls address/data latching timing. |
| OE# | Output Enable | Active-low output gate; determines data validity on DQ bus during read; high disables outputs to prevent bus contention. |
| WE# | Write Enable | Active-low write control; initiates latching of address/data and triggers internal program/erase sequences. |
| WP# | Write Protect | Active-low hardware lock for bottom 64 KB boot block; grounded to disable programming/erasing of 000000H–00FFFFH region. |
| RST# | Reset | Active-low hardware abort; forces immediate return to read mode, terminating any in-progress erase/program operation. |
| VDD / VSS | Power / Ground | Single 2.7–3.6 V supply; VSS pins provide dedicated ground returns for signal integrity and EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during active erase, enabling system responsiveness during firmware updates. |
| Auto Low Power Mode | Reduces active read current from 9 mA to 3 µA after valid read access, cutting standby power in always-on embedded systems. |
| Security ID Space | 256-bit user-programmable ID (128-bit factory-locked SST ID + 128-bit customer field) for device authentication and traceability. |
| Common Flash Interface (CFI) | Standardized query table (accessible via 98H command) enables automatic driver configuration and cross-vendor compatibility. |
| Software Data Protection | JEDEC-compliant 3-byte (program) or 6-byte (erase) command sequences prevent spurious writes during power transitions. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with hardware-protected boot sector ensuring bootloader integrity during remote firmware patches. Use Value: Bottom-block protection prevents corruption of startup routines; 100,000-cycle endurance supports 5+ years of scheduled field updates without replacement. |
Use Scenario: Holding calibrated sensor offsets, patient safety thresholds, and regulatory compliance parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention configuration memory with CFI support for automated driver initialization across product variants. Use Value: >100-year data retention guarantees parameter persistence over device lifetime; Security ID enables anti-counterfeiting and audit trail generation. |
| Networking Equipment Bootloader | Automotive Infotainment System Code Storage |
Use Scenario: Hosting primary bootloader and recovery image in enterprise switches and routers requiring secure, field-upgradable firmware. IC Role / Device Role / Timing Role: Dual-role flash: protected boot block for immutable startup code, remaining array for application firmware with sector-erase flexibility. Use Value: 70 ns access time enables fast boot sequence; erase-suspend allows background diagnostics during firmware download without interrupting operation. |
Use Scenario: Storing infotainment OS kernel, UI assets, and vehicle-specific configuration profiles in automotive head units operating across extended temperature ranges. IC Role / Device Role / Timing Role: Industrial-grade (–40°C to +85°C) flash memory interfacing directly with ARM-based application processors via x8 parallel bus. Use Value: Single 3.3 V supply simplifies power design; uniform 4 KB sectors allow granular OTA updates of navigation maps without full system reflash. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV160DBTI-70G | 16 Mbit (2M × 8), 70 ns access, top-boot block protection (not bottom), 3.0–3.6 V supply only. | Lacks bottom-boot protection; requires PCB-level redesign if bootloader resides in lower address space. | Select only if existing design uses top-boot layout or software-managed protection suffices. |
| S29AL016J70TFI020 | 16 Mbit (2M × 8), 70 ns access, bottom-boot protection, but requires 2.7–3.6 V and supports CFI v1.3 (vs. v1.0 in SST39VF1681). | Minor CFI descriptor differences may require minor driver adaptation; identical boot block map and timing. | Drop-in replacement for new designs where Cypress-compatible toolchains are preferred. |
Compared with MX29LV160DBTI-70G and S29AL016J70TFI020, the SST39VF1681-70-4I-EKE-T uniquely combines bottom-boot hardware protection with Auto Low Power mode and erase-suspend capability - critical for systems requiring guaranteed bootloader safety and concurrent background operations.
Availability
SST39VF1681-70-4I-EKE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, networking equipment bootloader, automotive infotainment system code storage, and embedded gateway secure boot applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39VF1681-70-4I-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 delivering smart, connected, and secure embedded control solutions with broad portfolio coverage and long-term product availability.
The SST39VF1681-70-4I-EKE-T belongs to Microchip's Multi-Purpose Flash Plus family, designed specifically for cost-sensitive, high-reliability embedded systems requiring field-upgradable firmware, secure boot, and robust data retention under industrial environmental stress.
FAQ
What is the boot block protection scheme implemented in the SST39VF1681-70-4I-EKE-T?
The SST39VF1681-70-4I-EKE-T implements bottom-block hardware write protection covering addresses 000000H–00FFFFH (64 KB). When the WP# pin is grounded, program and erase operations to this region are disabled. This ensures bootloader code remains intact during field firmware updates. The SST39VF1681-70-4I-EKE-T differs from the SST39VF1682, which protects the top 64 KB instead.
Does the SST39VF1681-70-4I-EKE-T support erase-suspend functionality, and how is it used?
Yes, the SST39VF1681-70-4I-EKE-T supports Erase-Suspend via the B0H command, allowing temporary halt of an ongoing sector or block erase. During suspend, the device enters read mode within 20 µs, enabling host systems to service interrupts or verify status without aborting the erase. The SST39VF1681-70-4I-EKE-T resumes via the 30H command. This feature is essential for real-time systems requiring deterministic response during firmware updates.
What voltage range does the SST39VF1681-70-4I-EKE-T operate within, and what happens outside that range?
The SST39VF1681-70-4I-EKE-T operates strictly within 2.7–3.6 V. Below 2.7 V, the internal voltage detector inhibits all write operations to prevent data corruption during brown-out. Above 3.6 V risks permanent damage per absolute maximum ratings. The SST39VF1681-70-4I-EKE-T draws 9 mA typical active current at 5 MHz and drops to 3 µA in Auto Low Power mode - both specified only within the rated VDD window.
How does the SST39VF1681-70-4I-EKE-T indicate completion of a byte-program operation?
The SST39VF1681-70-4I-EKE-T provides two software methods: Data# Polling (DQ7 toggles until completion, then reflects true data) and Toggle Bit (DQ6 toggles during programming, stops when complete). Both are valid after the rising edge of the fourth WE# or CE# pulse. The SST39VF1681-70-4I-EKE-T requires reading the same address twice if an ambiguous result occurs, ensuring reliable detection without hardware timers.
Is the SST39VF1681-70-4I-EKE-T pin-compatible with other 48-lead TSOP flash devices?
The SST39VF1681-70-4I-EKE-T follows JEDEC-standard x8 flash pinouts for 48-lead TSOP, matching signal assignments (A0–A20, DQ0–DQ7, CE#/OE#/WE#/WP#/RST#) of industry-standard parallel NOR flash. However, timing parameters, command sequences, and protection behavior differ - e.g., the SST39VF1681-70-4I-EKE-T uses SuperFlash® architecture with fixed 7 µs byte-program time, unlike floating-gate alternatives. Electrical compatibility exists, but firmware drivers must be validated per device.
SST39VF1681-70-4I-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:
- 16Mbit
- Memory Organization:
- 2M x 8
- 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-TSOP
SST39VF1681-70-4I-EKE-T FAQ
1.How can I place an order for SST39VF1681-70-4I-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF1681-70-4I-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 SST39VF1681-70-4I-EKE-T reliable?
The price and inventory of SST39VF1681-70-4I-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 SST39VF1681-70-4I-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF1681-70-4I-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF1681-70-4I-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF1681-70-4I-EKE-T?
SST39VF1681-70-4I-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF1681-70-4I-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 SST39VF1681-70-4I-EKE-T?
For technical support, including SST39VF1681-70-4I-EKE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF1681-70-4I-EKE-T requirements.
6.How does Aetrix verify that SST39VF1681-70-4I-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF1681-70-4I-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 SST39VF1681-70-4I-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF1681-70-4I-EKE-T?
All SST39VF1681-70-4I-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF1681-70-4I-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 SST39VF1681-70-4I-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF1681-70-4I-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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