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Microchip Technology SST39VF400A-70-4I-EKE-T
- Part No.:
- SST39VF400A-70-4I-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39VF400A-70-4I-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,124
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Product details
Overview
SST39VF400A-70-4I-EKE-T from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC using SuperFlash technology, operating at 2.7–3.6 V with 70 ns read access time, 14 µs word-program time, and JEDEC-standard x16 asynchronous interface. It serves as nonvolatile program/data storage in embedded controllers, BIOS firmware, and industrial HMI systems.
For engineers reviewing the SST39VF400A-70-4I-EKE-T datasheet, SST39VF400A-70-4I-EKE-T pinout, SST39VF400A-70-4I-EKE-T application, or SST39VF400A-70-4I-EKE-T equivalent, key selection criteria include its 2.7 V minimum VDD support, uniform 2 KWord sector erase, 32 KWord block erase, toggle-bit/data# polling write status detection, and TSOP-48 packaging compatible with legacy x16 memory sockets.
Technical Context
This device implements a split-gate SuperFlash cell architecture with thick-oxide tunneling injector, enabling fixed erase/program timing independent of cycle count-unlike conventional flash-thus eliminating software de-rating over lifetime. Its command-set follows JEDEC-standard pinouts and protocol, supporting Software Data Protection (SDP) via six-byte sequences for sector/block/chip erase and three-byte sequences for word-program.
It features dual write-completion detection (DQ6 toggle bit and DQ7 data# polling), hardware write inhibit during power-up/down, and CFI query mode for runtime identification. The device supports only x16 asynchronous interface-no x8 or burst modes-and requires no external VPP supply due to internal charge pump generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), providing 512 KB of addressable nonvolatile storage space |
| Read Access Time | 70 ns maximum - determines minimum bus cycle time in 16-bit parallel memory interfaces |
| Word-Program Time | 14 µs typical - enables high-throughput firmware updates without system stall |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB) - balances flexibility and speed for partial reprogramming |
| Endurance & Retention | 100,000 program/erase cycles typical; >100 years data retention - suitable for field-upgradable industrial firmware |
| Supply Voltage Range | 2.7–3.6 V - supports single-supply operation in 3.3 V systems with brown-out tolerance |
| Operating Temperature | -40°C to +85°C (Industrial grade) - validated for extended thermal environments in control panels and gateways |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 16 addressing; A17 selects upper half of 512 KB space - matches JEDEC x16 layout |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching; tri-stated when CE# or OE# high - enables clean bus sharing |
| CE# | Chip Enable | Active-low chip select - must be low for any operation; high = standby (3 µA current) |
| OE# | Output Enable | Active-low output gate - controls data bus visibility during read; irrelevant during write |
| WE# | Write Enable | Active-low write strobe - latches address/data edges and initiates SDP command sequencing |
| VDD | Power Supply | 2.7–3.6 V core supply - powers logic, charge pump, and memory array; no external VPP required |
| VSS | Ground | Two dedicated ground pins (pins 23 and 48) - reduce noise coupling in high-speed read/write transitions |
| NC | No Connect | Pins 9, 10, 12–15, 18, 20, 21, 22, 24, 25, 27, 29, 30, 32, 33, 35, 36, 38, 39, 41, 42, 44, 45 - electrically isolated; must not be tied |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash split-gate cell | Enables fixed 14 µs program and 18 ms sector/block erase times across full lifetime - eliminates timing margin erosion |
| JEDEC-standard command set | Ensures drop-in compatibility with existing x16 flash drivers and bootloader firmware without modification |
| Hardware + Software Data Protection | Prevents spurious writes during power ramp via VDD monitor, WE#/CE# glitch rejection, and mandatory SDP command sequences |
| Toggle Bit (DQ6) & Data# Polling (DQ7) | Allows host CPU to poll completion asynchronously - avoids fixed delays and improves system throughput |
| CFI Query Mode | Enables runtime identification of density, timing, and geometry - critical for multi-vendor BOM flexibility and field diagnostics |
Applications
| Industrial PLC Firmware Storage | Embedded Network Gateway Boot Code |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial port or USB without removing hardware. IC Role / Device Role / Timing Role: Nonvolatile boot code and configuration storage with sector-erase capability to preserve parameter tables during firmware patching. Use Value: 2.7 V operation ensures reliable programming during brown-out conditions; 100,000-cycle endurance supports decades of scheduled maintenance cycles. | Use Scenario: Holding boot loader and Linux kernel image in edge gateway devices deployed in remote cellular backhaul sites. IC Role / Device Role / Timing Role: Primary x16 flash for NOR-based execution-in-place (XIP) boot sequence and runtime firmware partitioning. Use Value: 70 ns read access enables fast instruction fetch; CFI support allows dynamic driver initialization without hard-coded part assumptions. |
| Medical Device Configuration Memory | Automotive Infotainment System BIOS |
Use Scenario: Retaining calibration data, user preferences, and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention storage with hardware write inhibit to prevent corruption during battery swaps or power loss. Use Value: >100-year data retention meets IEC 62304 Class C requirements; industrial temperature rating validates operation inside sealed enclosures. | Use Scenario: Storing UEFI-compatible BIOS and secure boot keys in automotive head units requiring AEC-Q100 alignment. IC Role / Device Role / Timing Role: Trusted firmware root-of-trust storage with verified erase granularity to isolate bootloader from application partitions. Use Value: Uniform 4 KB sector size enables precise firmware rollback; SDP commands prevent unauthorized reflash attempts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-EKE-T | Commercial temperature grade (0°C to +70°C) vs. Industrial (-40°C to +85°C); identical electrical specs and pinout | Not qualified for extended thermal environments - unsuitable for under-hood or outdoor industrial deployments | Select only for cost-sensitive, ambient-controlled applications where thermal derating is not required |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 2.7–3.6 V, but uses different command set (non-JEDEC standard) and lacks CFI query mode | Requires custom driver adaptation; no runtime geometry detection - increases firmware validation burden | Consider only if existing design already uses Macronix platform and migration effort is prohibitive |
Compared with SST39VF400A-70-4I-EKE-T, the -4C variant trades industrial temperature compliance for lower cost, while MX29LV400CTTI-70G sacrifices JEDEC interoperability and CFI support for marginally lower power in static operation - neither offers functional equivalence without firmware or layout review.
Availability
SST39VF400A-70-4I-EKE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive infotainment platforms requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant TSOP packaging.
Supply support for SST39VF400A-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 provider of microcontrollers, analog, FPGA, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF series belongs to Microchip's legacy SuperFlash NOR flash product line, designed specifically for embedded systems requiring reliable, low-voltage, sector-erasable program storage with JEDEC-standard compatibility and long data retention.
FAQ
What is the exact memory organization of the SST39VF400A-70-4I-EKE-T?
The SST39VF400A-70-4I-EKE-T is organized as 256K words × 16 bits, totaling 4 Mbit (512 KB) of storage. Address lines A0–A16 cover the full 256K-word space, with A17 used internally for block/sector address decoding during erase operations. This matches JEDEC-standard x16 flash topology and is confirmed in Tables 7–8 of the DS25001A datasheet.
Does the SST39VF400A-70-4I-EKE-T require an external VPP voltage for programming?
No, the SST39VF400A-70-4I-EKE-T does not require an external VPP supply. It integrates an internal charge pump to generate the high voltage needed for erase and program operations. All programming and erasing are performed using only the 2.7–3.6 V VDD supply, as explicitly stated in the "Features" section and Table 6 of the DS25001A datasheet.
How is write completion detected on the SST39VF400A-70-4I-EKE-T?
Write completion on the SST39VF400A-70-4I-EKE-T is detected using two hardware-supported methods: Toggle Bit (DQ6 toggles between 0 and 1 during operation, then stops) and Data# Polling (DQ7 returns complemented data during write, then true data upon completion). Both are valid after the fourth WE# pulse for programming and sixth for erase, per Figures 8–9 and Section "Write Operation Status Detection" in DS25001A.
Is the SST39VF400A-70-4I-EKE-T pin-compatible with the SST39LF400A series?
Yes, the SST39VF400A-70-4I-EKE-T is pin-compatible with the SST39LF400A series in the same package (e.g., TSOP-48), sharing identical pin assignments, signal names, and JEDEC-standard x16 interface. However, the LF variant requires 3.0–3.6 V for write operations, whereas the VF variant operates down to 2.7 V - a critical distinction for low-voltage system design.
What package type is used by the SST39VF400A-70-4I-EKE-T?
The SST39VF400A-70-4I-EKE-T uses a 48-lead TSOP (Thin Small Outline Package) with 12 mm × 20 mm body dimensions and standard lead pitch. This is confirmed in the "Packages Available" section of the datasheet and Figure 2 ("Pin Assignments for 48-Lead TSOP"), and the "-EKE-T" suffix explicitly denotes the TSOP-48 RoHS-compliant variant.
SST39VF400A-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:
- 4Mbit
- Memory Organization:
- 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- 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
SST39VF400A-70-4I-EKE-T FAQ
1.How can I place an order for SST39VF400A-70-4I-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-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 SST39VF400A-70-4I-EKE-T reliable?
The price and inventory of SST39VF400A-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 SST39VF400A-70-4I-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-EKE-T?
SST39VF400A-70-4I-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-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 SST39VF400A-70-4I-EKE-T?
For technical support, including SST39VF400A-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 SST39VF400A-70-4I-EKE-T requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-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 SST39VF400A-70-4I-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-EKE-T?
All SST39VF400A-70-4I-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-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 SST39VF400A-70-4I-EKE-T part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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