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Microchip Technology SST39VF1681-70-4I-EKE
- Part No.:
- SST39VF1681-70-4I-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF1681-70-4I-EKE.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:101
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Product details
Overview
SST39VF1681-70-4I-EKE from Microchip Technology is a 16 Mbit (2M × 8) Multi-Purpose Flash Plus (MPF+) memory IC with bottom-boot block protection, 70 ns read access time, and single 2.7–3.6 V supply operation. It delivers 100,000 program/erase cycles endurance and >100 years data retention, used in embedded firmware storage for industrial controllers and legacy communication modules.
For engineers reviewing the SST39VF1681-70-4I-EKE datasheet, SST39VF1681-70-4I-EKE pinout, SST39VF1681-70-4I-EKE application, or SST39VF1681-70-4I-EKE equivalent, key selection considerations include bottom-block hardware write protection (000000H–00FFFFH), JEDEC-standard x8 asynchronous interface timing, sector/block/chip erase flexibility, and Auto Low Power mode (3 µA standby).
Technical Context
The SST39VF1681-70-4I-EKE implements SST's SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count. Its command-set architecture supports JEDEC-standard software data protection (SDP) and CFI query mode for system identification.
It features dual status detection (DQ7 Data# Polling and DQ6/DQ2 Toggle Bits) for precise end-of-write monitoring, hardware reset (RST#) for forced return to read mode, and dedicated WP# pin enabling bottom 64 KByte boot block protection-distinct from the top-block protected SST39VF1682 variant.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 × 8 bits); supports firmware image storage up to 2 MB in x8 bus systems. |
| Read Access Time | 70 ns max; enables direct execution from flash (XIP) in microcontrollers with ≤14 MHz bus timing. |
| Supply Voltage | 2.7–3.6 V; compatible with 3.3 V logic domains without level-shifting in industrial and telecom applications. |
| Endurance | 100,000 program/erase cycles; sufficient for field firmware updates over 10+ years in deployed equipment. |
| Data Retention | >100 years at +85°C; ensures long-term reliability in unattended infrastructure devices. |
| Erase Granularity | Uniform 4 KByte sectors and 64 KByte blocks; allows selective update of bootloader, config, or application partitions. |
| Protection Scheme | Hardware bottom-block protection (000000H–00FFFFH); prevents accidental overwrite of critical boot code 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 = AMS (most significant address); selects sector (A12–A20) or block (A16–A20) during erase. |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus; latched internally during write; tri-stated when CE# or OE# high. |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high; required low for all operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive; must be low with CE# for valid read output. |
| WE# | Write Enable | Active-low control for byte-program and command latching; timing-critical for SDP sequence validity. |
| WP# | Write Protect | Active-low hardware lock for bottom 64 KByte boot block (000000H–00FFFFH); floating = unprotected. |
| RST# | Reset | Active-low hardware abort; terminates ongoing erase/program and forces return to read mode within TRP. |
| VDD / VSS | Power / Ground | Single 2.7–3.6 V supply; no VPP pin required-internal charge pump generates programming voltage. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with fixed 18 ms sector/block erase time-no degradation over lifetime, eliminating software de-rating. |
| Erase-Suspend/Resume | Allows real-time read from non-suspended sectors during active erase, enabling background firmware validation. |
| Auto Low Power Mode | Reduces active read current from 9 mA to 3 µA after valid access-cuts power by 3,000× during idle polling intervals. |
| Security ID Space | 256-bit user-programmable ID (128-bit factory + 128-bit user); locked permanently after programming to prevent tampering. |
| CFI Query Support | JEDEC-standard CFI table (address 10H–34H) enables automatic driver configuration and cross-manufacturer compatibility checks. |
Applications
| Industrial PLC Firmware Storage | Legacy Telecom Line Card Boot Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware and I/O configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot and application code storage with hardware-protected bottom block ensuring bootloader integrity across power cycles and remote updates. Use Value: Bottom-block protection prevents corruption of startup code during field firmware patches; 100K-cycle endurance supports 5+ years of scheduled maintenance updates. | Use Scenario: Holding boot code, DSP microcode, and line protocol stacks in TDM-based telecom line cards requiring long product lifecycles and zero-field-failure tolerance. IC Role / Device Role / Timing Role: x8 asynchronous flash memory interfaced directly to 8-bit microcontroller buses; 70 ns access enables deterministic boot timing under worst-case voltage/temperature. Use Value: Fixed 18 ms erase time eliminates variable boot delay; >100-year data retention guarantees operation beyond equipment decommissioning timelines. |
| Medical Diagnostic Equipment Configuration | Automotive Body Control Module (BCM) Calibration Data |
Use Scenario: Storing calibration profiles, sensor compensation tables, and regulatory compliance logs in portable ultrasound and ECG devices subject to strict traceability requirements. IC Role / Device Role / Timing Role: Secure, field-updatable parameter storage with user Security ID space for device authentication and audit trail binding. Use Value: 256-bit Security ID enables cryptographic binding of calibration data to hardware identity; JEDEC-standard interface simplifies qualification across medical OEMs. | Use Scenario: Retaining vehicle-specific calibration maps (e.g., lighting timing, window auto-reverse thresholds) in BCMs exposed to automotive temperature extremes and vibration. IC Role / Device Role / Timing Role: Industrial-grade flash memory with –40°C to +85°C operation and 3 µA Auto Low Power mode minimizing battery drain during vehicle sleep states. Use Value: 3.3 V single-supply operation eliminates external regulators; bottom-block protection isolates critical safety-critical calibration data from general firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1682-70-4I-EKE | Identical specs except top-boot block protection (1F0000H–1FFFFFH) instead of bottom-boot. | Used where bootloader resides in upper memory region; incompatible pin-level replacement due to different protected address range. | Select only if system design allocates boot code to top 64 KByte; verify address map alignment before substitution. |
| MX29LV160DBTI-70G | 16 Mbit x16/x8 configurable interface; 70 ns access; 100K cycles; but requires VPP=12 V for programming and lacks Auto Low Power mode. | Requires external high-voltage generation and additional power management; higher active current (15 mA typical) increases thermal load. | Choose only if x16 bus width is needed or existing board uses MXIC footprint; not drop-in due to VPP dependency and higher power. |
Compared with SST39VF1682-70-4I-EKE, the SST39VF1681-70-4I-EKE provides bottom-block protection essential for legacy boot architectures, while MX29LV160DBTI-70G introduces VPP complexity and higher power-making SST39VF1681-70-4I-EKE optimal for cost-sensitive, low-power, bottom-boot designs.
Availability
SST39VF1681-70-4I-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy telecom line card boot memory, and medical diagnostic equipment configuration requiring stable component supply and long-lifecycle support.
Supply support for SST39VF1681-70-4I-EKE 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 microcontrollers, analog, FPGA, and memory solutions with emphasis on reliability and longevity for industrial and automotive markets.
The SST39VF1681-70-4I-EKE belongs to Microchip's legacy SuperFlash® MPF+ family, designed specifically for cost-effective, low-voltage, high-endurance firmware and configuration storage in long-lifecycle embedded systems.
FAQ
What is the exact memory organization of the SST39VF1681-70-4I-EKE?
The SST39VF1681-70-4I-EKE is organized as 2,097,152 words × 8 bits (2M × 8), totaling 16 Mbit. Its physical address space spans 000000H to 1FFFFFH. The bottom 64 KByte (000000H–00FFFFH) is hardware-protected via WP#, and it contains 512 uniform 4 KByte sectors and 32 uniform 64 KByte blocks as confirmed in DS25040A Table 9.
Does the SST39VF1681-70-4I-EKE require an external VPP voltage for programming?
No, the SST39VF1681-70-4I-EKE does not require external VPP. It uses internal charge pump circuitry to generate programming voltage-confirmed by "VPP min/max = 00H" in CFI Table 8 and "Internal VPP Generation" in the Features list. All program/erase operations execute from the single 2.7–3.6 V VDD supply.
How does hardware block protection work on the SST39VF1681-70-4I-EKE?
Hardware block protection on the SST39VF1681-70-4I-EKE is activated by pulling WP# low, which locks the bottom 64 KByte boot block (000000H–00FFFFH) against program and erase commands. If WP# is left floating, an internal pull-up holds it high, disabling protection. This behavior is exclusive to SST39VF1681; SST39VF1682 protects the top block instead.
What is the purpose of the RST# pin on the SST39VF1681-70-4I-EKE?
The RST# pin on the SST39VF1681-70-4I-EKE provides hardware-initiated recovery: holding RST# low for ≥TRP (100 ns min) aborts any in-progress program or erase operation and forces immediate return to read mode. After release, a minimum TRHR (100 ns) delay is required before valid reads resume-critical for fault-tolerant bootloader recovery sequences.
Can the SST39VF1681-70-4I-EKE be used in a 5 V system?
No, the SST39VF1681-70-4I-EKE is strictly a 2.7–3.6 V device. Absolute maximum DC voltage on any pin is VDD + 0.5 V, and VDD must remain within specification during all operations. Interfacing to 5 V systems requires level translation on all address, data, and control lines-verified in DS25040A Table 12 and Absolute Maximum Ratings.
SST39VF1681-70-4I-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for SST39VF1681-70-4I-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF1681-70-4I-EKE 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 reliable?
The price and inventory of SST39VF1681-70-4I-EKE 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 is usually 5 days.
3.What payment methods are accepted for SST39VF1681-70-4I-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF1681-70-4I-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF1681-70-4I-EKE?
SST39VF1681-70-4I-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF1681-70-4I-EKE 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?
For technical support, including SST39VF1681-70-4I-EKE 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 requirements.
6.How does Aetrix verify that SST39VF1681-70-4I-EKE is sourced from the original manufacturer or authorized distributors?
All SST39VF1681-70-4I-EKE 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 meets industry standards.
7.What is the process for return or replacement of SST39VF1681-70-4I-EKE?
All SST39VF1681-70-4I-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF1681-70-4I-EKE, 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 part is unused and in its original packaging.
Return procedure for SST39VF1681-70-4I-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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