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Microchip Technology SST39VF1681-70-4C-EKE-T
- Part No.:
- SST39VF1681-70-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF1681-70-4C-EKE-T.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,296
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Product details
Overview
SST39VF1681-70-4C-EKE-T from Microchip Technology is a 16 Mbit (2M × 8) Multi-Purpose Flash Plus (MPF+) memory IC designed for nonvolatile program, configuration, and data storage in embedded systems. It operates from a single 2.7–3.6 V supply, delivers 70 ns read access time, supports bottom 64 KByte hardware block protection, and uses SST's SuperFlash® technology for 100,000 program/erase cycles and >100 years data retention.
For engineers reviewing the SST39VF1681-70-4C-EKE-T datasheet, SST39VF1681-70-4C-EKE-T pinout, SST39VF1681-70-4C-EKE-T application, or SST39VF1681-70-4C-EKE-T equivalent, this page provides verified technical context, JEDEC-compliant x8 interface details, sector/block/chip erase timing, hardware reset (RST#) and write protect (WP#) behavior, and real-world use cases in boot code storage and firmware update systems.
Technical Context
The SST39VF1681-70-4C-EKE-T implements a CMOS SuperFlash® architecture with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count-unlike conventional flash. It conforms to JEDEC-standard x8 asynchronous interface pinouts and command sets, supporting byte-program, sector-erase (4 KByte), block-erase (64 KByte), chip-erase, and erase-suspend/resume operations.
It features dual status detection via DQ7 (Data# Polling) and DQ6/DQ2 (Toggle Bits), hardware WP#-controlled bottom-boot-block protection (000000H–00FFFFH), active RST# pin for hardware reset to Read mode, and integrated CFI query support for automatic device identification. The device enters Auto Low Power mode after valid reads, reducing active current from 9 mA to 3 µA without access penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (2,097,152 × 8 bits); supports full boot code and firmware image storage in space-constrained designs. |
| Read Access Time | 70 ns max; enables direct execution (XIP) from flash in microcontroller-based systems without wait states at moderate clock speeds. |
| Supply Voltage | 2.7–3.6 V single supply; compatible with 3.3 V logic domains and eliminates need for separate VPP programming voltage. |
| Endurance | 100,000 program/erase cycles (typical); sufficient for field firmware updates over 10+ years in industrial controllers. |
| Data Retention | >100 years; ensures long-term reliability in unpowered storage for medical, automotive, and infrastructure equipment. |
| Erase Granularity | Uniform 4 KByte sectors and 64 KByte blocks; allows precise firmware patching without erasing entire application space. |
| Protection Scheme | Hardware bottom-block protection (000000H–00FFFFH) via WP# pin; prevents accidental overwrite of boot loader during system updates. |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS compliant, JEDEC standard footprint compatible with automated PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus; A20 is most significant bit (AMS); selects byte location during read/write, sector during sector-erase (A12–A20), block during block-erase (A16–A20). |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus; latched internally during write; tri-stated when CE# or OE# high; DQ6/DQ2 provide toggle status, DQ7 supports data polling. |
| CE# | Chip Enable | Active-low chip select; must be low to enable read/write operations; high state places device in standby (3 µA typical). |
| OE# | Output Enable | Active-low output gate; controls data bus drive; used with CE# to initiate read cycles; high disables outputs. |
| WE# | Write Enable | Active-low control for write operations; latches address/data on falling/rising edges per JEDEC timing; initiates internal program/erase sequences. |
| WP# | Write Protect | Active-low hardware lock for bottom 64 KByte boot block (000000H–00FFFFH); grounded to prevent inadvertent erase/program of boot code. |
| RST# | Reset | Active-low hardware reset; forces immediate return to Read mode; required minimum pulse width TRP; recovery delay TRHR applies before valid read. |
| VDD / VSS | Power / Ground | Single 2.7–3.6 V supply and ground; decoupling recommended near pins; NC pins are unconnected and must remain floating. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell + thick-oxide injector enables fixed 18 ms sector/block erase and 7 µs byte-program times across full lifecycle-no software de-rating needed. |
| Erase-Suspend/Resume | Allows temporary halt of sector/block erase to read or program other locations; critical for real-time systems requiring concurrent firmware validation and update. |
| Security ID Space | 256-bit user-programmable ID (128-bit factory-locked SST ID + 128-bit customer field); supports secure boot authentication and device traceability. |
| Auto Low Power Mode | Automatically transitions from 9 mA active read to 3 µA standby after valid access; reduces average power in polling-based firmware update monitors. |
| CFI Query Support | JEDEC-standard Common Flash Interface enables runtime detection of geometry, timing, and command set-essential for generic flash drivers in OS/bootloader stacks. |
Applications
| Boot Code Storage | Firmware Update Module |
|---|---|
|
Use Scenario: Storing primary bootloader and initial firmware image in microcontroller-based industrial PLCs where power loss during update must not corrupt startup code. IC Role / Device Role / Timing Role: Nonvolatile x8 parallel memory providing direct-addressed boot code execution; bottom 64 KByte protected by WP# to prevent overwrite. Use Value: Hardware block protection ensures boot integrity; 70 ns access enables zero-wait-state XIP; >100-year retention guarantees field longevity without refresh. |
Use Scenario: Field-upgradable firmware storage in networked IoT gateways requiring safe, atomic firmware patches without full reflash. IC Role / Device Role / Timing Role: MPF+ flash supporting sector-erase (4 KByte) and erase-suspend to validate new firmware while maintaining operational continuity. Use Value: Sector granularity minimizes downtime; suspend/resume avoids watchdog timeouts; CFI support simplifies driver portability across product variants. |
| Configuration Memory | Legacy System Emulation |
|
Use Scenario: Storing calibration tables, device-specific parameters, and user preferences in medical diagnostic equipment with regulatory data integrity requirements. IC Role / Device Role / Timing Role: Byte-programmable nonvolatile memory with Data# Polling (DQ7) and Toggle Bit (DQ6) status feedback for deterministic write completion detection. Use Value: 100,000-cycle endurance exceeds 10-year service life; >100-year retention satisfies FDA 21 CFR Part 11 archival mandates; RoHS compliance meets global medical standards. |
Use Scenario: Replacing obsolete EPROMs in legacy industrial HMIs and CNC controllers where pin-compatible x8 interface and 70 ns timing are mandatory. IC Role / Device Role / Timing Role: JEDEC-standard x8 flash with identical TSOP-48 footprint and timing as 27C010/27C020 EPROMs, but with in-system programmability. Use Value: Eliminates UV erasers and programmers; supports field firmware patches; same PCB layout reduces redesign cost and qualification effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1682-70-4C-EKE-T | Same density, timing, and package-but top 64 KByte block protection (1F0000H–1FFFFFH) instead of bottom; different WP# protection range. | Used where boot code resides in upper memory map; incompatible for bottom-boot designs without address remapping. | Select only if system boot vector targets top 64 KByte; verify WP# routing and address decoding match SST39VF1682's protected region. |
| MX29LV160DBTI-70G | 16 Mbit x16/x8 configurable interface; 70 ns access; 3.0–3.6 V supply; no RST# pin; bottom-boot protection enabled via A6/A7 address pins. | Lacks dedicated RST# and hardware WP#; requires external reset circuitry and address-based protection logic; different command set. | Acceptable for cost-sensitive designs where RST# is redundant and WP# control can be implemented via GPIO/address decode; verify CFI compatibility. |
Compared with SST39VF1682-70-4C-EKE-T, the SST39VF1681-70-4C-EKE-T provides bottom-boot protection essential for legacy x86 and ARM7 bootloaders, while MX29LV160DBTI-70G trades dedicated control pins for flexibility at the cost of increased design complexity and reduced out-of-box reliability for boot-critical applications.
Availability
SST39VF1681-70-4C-EKE-T is available at Aetrix Electronics and suitable for industrial control panels, medical diagnostics equipment, and legacy system upgrades requiring stable component supply, long-lifecycle support, and RoHS-compliant TSOP packaging.
Supply support for SST39VF1681-70-4C-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 global semiconductor company formed through the acquisition of Silicon Storage Technology (SST), specializing in nonvolatile memory, microcontrollers, and analog products.
The SST39VF1681-70-4C-EKE-T belongs to the Multi-Purpose Flash Plus (MPF+) product line, engineered for reliable, low-power, in-system programmable storage in resource-constrained embedded applications where boot integrity and field-upgrade capability are critical.
FAQ
What is the exact memory organization of the SST39VF1681-70-4C-EKE-T?
The SST39VF1681-70-4C-EKE-T is organized as 2,097,152 words × 8 bits (2M × 8), totaling 16 Mbit. Its address space spans 000000H to 1FFFFFH. The bottom 64 KByte (000000H–00FFFFH) is hardware-protected via the WP# pin, and it supports uniform 4 KByte sectors (512 total) and 64 KByte blocks (32 total). This structure is confirmed in DS25040A, Tables 3 and 9.
Does the SST39VF1681-70-4C-EKE-T require an external VPP voltage for programming?
No, the SST39VF1681-70-4C-EKE-T does not require an external VPP voltage. It performs all program and erase operations using only the 2.7–3.6 V VDD supply, with internal charge pump generation. Table 8 (DS25040A) explicitly lists VPP min/max as 00H, confirming no VPP pin or external voltage is needed-enabling simpler power design and eliminating high-voltage circuitry.
How does hardware block protection work on the SST39VF1681-70-4C-EKE-T?
Hardware block protection on the SST39VF1681-70-4C-EKE-T is activated by pulling the WP# pin low, which locks the bottom 64 KByte boot block (000000H–00FFFFH) against program and erase operations. If WP# is left floating, an internal pull-up holds it high, disabling protection. This behavior is specific to the SST39VF1681 variant and differs from the top-block protection of SST39VF1682, as defined in Table 3 of DS25040A.
What is the purpose of the RST# pin on the SST39VF1681-70-4C-EKE-T?
The RST# pin on the SST39VF1681-70-4C-EKE-T provides a hardware method to force the device into Read mode regardless of ongoing internal operations. Holding RST# low for ≥TRP terminates any active program or erase cycle and resets control logic. After release, a minimum TRHR delay is required before valid reads resume. This pin is essential for system-level fault recovery and is distinct from software reset commands.
Can the SST39VF1681-70-4C-EKE-T be used in industrial temperature environments?
Yes, the SST39VF1681-70-4C-EKE-T is rated for industrial temperature operation (–40°C to +85°C) under the "4C" suffix designation, as specified in Table 10 of DS25040A. Its DC and AC characteristics-including 70 ns access time, 9 mA active current, and 3 µA standby-are guaranteed across this full range, making it suitable for factory automation, transportation, and outdoor embedded systems.
SST39VF1681-70-4C-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:
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
SST39VF1681-70-4C-EKE-T FAQ
1.How can I place an order for SST39VF1681-70-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF1681-70-4C-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 SST39VF1681-70-4C-EKE-T reliable?
The price and inventory of SST39VF1681-70-4C-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 SST39VF1681-70-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF1681-70-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF1681-70-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF1681-70-4C-EKE-T?
SST39VF1681-70-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF1681-70-4C-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 SST39VF1681-70-4C-EKE-T?
For technical support, including SST39VF1681-70-4C-EKE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF1681-70-4C-EKE-T requirements.
6.How does Aetrix verify that SST39VF1681-70-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF1681-70-4C-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 SST39VF1681-70-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF1681-70-4C-EKE-T?
All SST39VF1681-70-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF1681-70-4C-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 SST39VF1681-70-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF1681-70-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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