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Microchip Technology SST39VF400A-70-4C-C1QE
- Part No.:
- SST39VF400A-70-4C-C1QE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-UFLGA
- Datasheet:
-
SST39VF400A-70-4C-C1QE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48XFLGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,086
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Product details
Overview
SST39VF400A-70-4C-C1QE from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC with x16 asynchronous interface, 70 ns read access time, 2.7–3.6 V single-supply operation, and JEDEC-standard pinout. It delivers uniform 2 KWord sector and 32 KWord block erase capability for embedded firmware storage in industrial control systems.
For engineers reviewing the SST39VF400A-70-4C-C1QE datasheet, SST39VF400A-70-4C-C1QE pinout, SST39VF400A-70-4C-C1QE application, or SST39VF400A-70-4C-C1QE equivalent, key selection criteria include its 2.7 V minimum VDD support, 100,000-cycle endurance, 14 µs word-program time, SuperFlash split-gate reliability architecture, and TSOP-48 package compatibility with legacy x16 memory sockets.
Technical Context
This device implements SST's proprietary SuperFlash technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program timing independent of cycle count. Its command-set architecture supports JEDEC-standard software data protection (SDP), CFI query mode, and product identification via 3-byte sequences at address 5555H.
Operation relies on three control signals-CE#, OE#, and WE#-with latched address/data buses and tri-state outputs. End-of-write detection uses DQ7 (Data# Polling) and DQ6 (Toggle Bit), both validated after the fourth (program) or sixth (erase) WE# pulse rising edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), supporting 512 KB of x16 data storage |
| Read Access Time | 70 ns - determines maximum bus clock rate in synchronous interfaces |
| VDD Operating Range | 2.7–3.6 V - enables direct interface with 3.3 V logic and brown-out tolerant designs |
| Endurance | 100,000 program/erase cycles - ensures long-term field reliability in firmware update applications |
| Data Retention | >100 years - guarantees nonvolatile storage integrity across product lifecycles |
| Word-Program Time | 14 µs typical - reduces firmware patch latency and improves system responsiveness |
| Erase Granularity | 2 KWord sectors / 32 KWord blocks - enables selective updates without full-chip erasure |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, lead-free.
| 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 |
| DQ0–DQ15 | Data I/O | x16 bidirectional bus with internal latching and tri-state control via CE#/OE# |
| CE# | Chip Enable | Active-low chip select; disables device and reduces current to 20 µA standby |
| OE# | Output Enable | Active-low output gate; high-Z state when asserted high or CE# high |
| WE# | Write Enable | Controls latching of address/data and initiates internal program/erase operations |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash array |
| VSS | Ground | Two dedicated ground pins ensure stable reference for I/O and core circuits |
| NC | No Connection | Unbonded pins (e.g., A18, multiple NCs) - must be left floating or tied to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash split-gate cell | Enables fixed 14 µs program and 18 ms sector/block erase times regardless of accumulated cycles |
| JEDEC-standard command set | Ensures drop-in compatibility with existing x16 flash firmware drivers and boot loaders |
| Hardware + software data protection | Prevents spurious writes during power-up/down via VDD monitoring, noise filtering, and 3-/6-byte SDP sequences |
| CFI Query mode | Allows runtime detection of device geometry, timing parameters, and erase capabilities without external configuration |
| Uniform 4 KB sectors | Supports fine-grained firmware partitioning (e.g., bootloader, app, config) with independent update scheduling |
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 code storage with in-system reprogrammability and 100-year data retention. Use Value: Enables remote firmware patches without hardware replacement, reducing downtime and service costs. | Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory compliance settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, low-power configuration memory with hardware write-inhibit during power transitions. Use Value: Maintains patient-specific settings across battery swaps and power cycles while meeting IEC 62304 safety requirements. |
| Automotive Infotainment Bootloader | Networking Equipment Image Storage |
Use Scenario: Hosting secure bootloader code that validates and loads main OS images in automotive head units. IC Role / Device Role / Timing Role: Trusted execution root-of-trust storage with sector-level erase isolation for recovery partitions. Use Value: Supports A/B image updates and failsafe rollback using independent 4 KB sector boundaries. | Use Scenario: Storing FPGA bitstreams and microcontroller firmware in managed Ethernet switches with field-upgrade capability. IC Role / Device Role / Timing Role: High-reliability, multi-sector flash for concurrent read-while-write operations during hot upgrades. Use Value: Reduces upgrade window by enabling background programming of inactive sectors while active firmware runs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 2.7–3.6 V, but uses standard NOR architecture without SuperFlash timing stability | Lacks fixed-program timing; erase times increase with cycle count, requiring software de-rating | Select when legacy driver compatibility outweighs long-term timing predictability |
| S29AL032D70TFI020 | 32 Mbit x16, 70 ns, 2.7–3.6 V, with enhanced security registers and wider voltage margin | Higher density and added security features increase BOM cost and require modified address decoding | Select when future-proofing for larger firmware or mandatory secure boot enforcement is required |
Compared with MX29LV400CTTI-70G and S29AL032D70TFI020, the SST39VF400A-70-4C-C1QE provides superior long-term timing consistency due to SuperFlash's cycle-independent erase/program durations, making it optimal for applications where deterministic update latency is critical across 10+ years of field operation.
Availability
SST39VF400A-70-4C-C1QE is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive infotainment, and networking equipment requiring stable component supply and long-lifecycle support.
Supply support for SST39VF400A-70-4C-C1QE 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 devices, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF400A-70-4C-C1QE belongs to the SST39VF family of Multi-Purpose Flash devices designed for cost-sensitive, high-reliability embedded systems requiring flexible in-field firmware updates and extended data retention.
FAQ
What is the guaranteed minimum VDD voltage for reliable operation of the SST39VF400A-70-4C-C1QE?
The SST39VF400A-70-4C-C1QE is specified for reliable read, program, and erase operations down to 2.7 V. Below this threshold, write inhibit circuitry activates to prevent corruption, and the device enters standby mode with ≤20 µA current draw. This 2.7 V minimum enables interoperability with wide-range 3.3 V power rails and brown-out resilient designs without external regulators.
How does the SST39VF400A-70-4C-C1QE handle end-of-write detection during firmware updates?
The SST39VF400A-70-4C-C1QE supports two real-time status methods: Data# Polling (DQ7) and Toggle Bit (DQ6). After initiating a program or erase command, software reads DQ7 to detect true data return (indicating completion) or monitors DQ6 toggling cessation. Both methods are validated after the fourth (program) or sixth (erase) WE# rising edge, enabling efficient polling without fixed timeout delays.
Is the SST39VF400A-70-4C-C1QE pin-compatible with earlier SST39LF400A variants?
No - the SST39VF400A-70-4C-C1QE operates at 2.7–3.6 V and uses A17 as the most significant address bit, whereas the SST39LF400A requires 3.0–3.6 V and uses A16. Though both share identical TSOP-48 pinouts and JEDEC command sets, their VDD ranges and address mapping differ, requiring board-level voltage and address bus validation before substitution.
What erase granularities does the SST39VF400A-70-4C-C1QE support, and how many sectors/blocks are available?
The SST39VF400A-70-4C-C1QE supports uniform 2 KWord (4 KB) sectors and 32 KWord (64 KB) blocks. As a 256K × 16 device, it contains 128 sectors and 8 blocks. Sector erase allows targeted updates of small firmware modules, while block erase accelerates bulk reprogramming of application binaries - both executed via standardized six-byte command sequences.
Does the SST39VF400A-70-4C-C1QE include hardware-based write protection independent of software commands?
Yes - the SST39VF400A-70-4C-C1QE integrates three hardware protections: (1) noise/glitch filtering rejecting WE#/CE# pulses <5 ns, (2) VDD power-up/down detection disabling writes below 1.5 V, and (3) automatic write inhibit when OE# is low, CE# is high, or WE# is high. These operate transparently alongside software data protection (SDP), ensuring robustness during power transients without firmware intervention.
SST39VF400A-70-4C-C1QE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-UFLGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-XFLGA (6x4)
SST39VF400A-70-4C-C1QE FAQ
1.How can I place an order for SST39VF400A-70-4C-C1QE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4C-C1QE 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-70-4C-C1QE reliable?
The price and inventory of SST39VF400A-70-4C-C1QE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39VF400A-70-4C-C1QE is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4C-C1QE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4C-C1QE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4C-C1QE?
SST39VF400A-70-4C-C1QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4C-C1QE 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-70-4C-C1QE?
For technical support, including SST39VF400A-70-4C-C1QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4C-C1QE requirements.
6.How does Aetrix verify that SST39VF400A-70-4C-C1QE is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4C-C1QE 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-70-4C-C1QE meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4C-C1QE?
All SST39VF400A-70-4C-C1QE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4C-C1QE, 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-70-4C-C1QE part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4C-C1QE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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