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Microchip Technology SST39VF400A-70-4I-B3KE
- Part No.:
- SST39VF400A-70-4I-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39VF400A-70-4I-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,662
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Product details
Overview
SST39VF400A-70-4I-B3KE 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 is used in embedded firmware storage for industrial controllers requiring reliable in-system reprogramming.
For engineers reviewing the SST39VF400A-70-4I-B3KE datasheet, SST39VF400A-70-4I-B3KE pinout, SST39VF400A-70-4I-B3KE application, or SST39VF400A-70-4I-B3KE equivalent, key selection criteria include voltage range compatibility (2.7–3.6 V), TSOP-48 package footprint, sector/block-erase architecture, and software data protection compliance with JEDEC command sets.
Technical Context
This device implements a split-gate SuperFlash cell with thick-oxide tunneling injector for enhanced endurance (100,000 cycles) and >100-year data retention. It supports uniform 2 KWord sectors and 32 KWord blocks, with erase/program timing independent of cycle count-enabling stable system-level timing without de-rating.
Operation relies on standard microprocessor bus control: CE# enables chip select, OE# gates output buffers, and WE# controls write latching. End-of-write detection uses DQ7 (Data# Polling) and DQ6 (Toggle Bit), both validated after the fourth (program) or sixth (erase) WE# pulse per JEDEC-compliant command sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), providing 512 KB of nonvolatile storage for boot code or configuration data |
| Read Access Time | 70 ns - determines maximum sustained read throughput in 16-bit parallel bus systems |
| Supply Voltage | 2.7–3.6 V - compatible with low-voltage industrial power rails and eliminates need for level shifters |
| Endurance | 100,000 program/erase cycles - supports frequent field firmware updates over product lifetime |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Word-Program Time | 14 µs - enables fast incremental updates without blocking host CPU for extended periods |
| Erase Granularity | 2 KWord sectors / 32 KWord blocks - allows selective reprogramming while preserving adjacent firmware sections |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile (260°C for 10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 16 addressing; A17 selects upper half of address space for block erase |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby mode (3 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus visibility during read cycles only |
| WE# | Write Enable | Active-low write strobe; latches address/data and initiates internal program/erase sequences |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and memory array; no external VPP required |
| VSS | Ground | Two dedicated ground pins (pins 23 and 47) reduce noise coupling in high-speed reads |
| NC | No Connection | Pins 9, 10, 12–15, 18, 20, 21, 22, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 40, 41, 42, 43, 44, 45, 46 - electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash cell architecture | Split-gate + thick-oxide tunneling injector enables fixed erase/program times across full lifecycle |
| JEDEC-standard command set | Fully compatible with industry-standard flash command protocols (e.g., 6-byte erase, 3-byte program unlock) |
| Hardware + software data protection | Glitch immunity (<5 ns), VDD monitoring, and mandatory 3-byte unlock sequence prevent accidental writes |
| CFI and Software ID support | Enables automatic device identification and geometry query in multi-manufacturer BOM environments |
| Latched address/data interface | Reduces external bus timing constraints by internally capturing address and data on WE#/CE# edges |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial interface or SD card. IC Role / Device Role / Timing Role: Nonvolatile code storage with byte/word-level random access and sector-erase capability for partial updates. Use Value: 70 ns read access enables real-time scan-cycle execution; 100,000-cycle endurance supports decades of maintenance updates. | Use Scenario: Holding calibration tables and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, long-retention parameter storage with hardware write inhibit during power transitions. Use Value: >100-year data retention meets FDA regulatory requirements; 2.7–3.6 V operation matches battery-backed medical power supplies. |
| Automotive Infotainment Boot ROM | Networking Equipment Feature License Storage |
Use Scenario: Hosting boot loader and recovery image in head-unit ECUs where cold-start timing is critical. IC Role / Device Role / Timing Role: Primary boot memory accessed directly by MCU during power-on reset sequence. Use Value: 70 ns access time minimizes boot latency; industrial temperature rating (-40°C to +85°C) ensures reliability across vehicle thermal zones. | Use Scenario: Storing encrypted feature-enable keys and license metadata in enterprise switches/routers. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile storage for runtime license validation. Use Value: Software Data Protection (SDP) prevents unauthorized modification; CFI query allows dynamic license capacity detection. |
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-B3KE | Commercial temperature grade (0°C to +70°C) vs. industrial (-40°C to +85°C); identical electrical specs and pinout | Not rated for extended thermal cycling or automotive under-hood environments | Select for cost-sensitive consumer electronics where ambient temperature remains controlled |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 2.7–3.6 V, but uses different command set (non-JEDEC-compatible unlock sequence) and lacks CFI support | Requires firmware driver modification; no automatic geometry detection | Choose only if existing design already uses Macronix command protocol and CFI is unused |
Compared with SST39VF400A-70-4I-B3KE, the -4C variant trades industrial temperature tolerance for lower cost in benign environments, while MX29LV400CTTI-70G requires driver-level adaptation due to incompatible command architecture and missing CFI-making SST39VF400A-70-4I-B3KE preferable for new designs needing plug-and-play JEDEC compliance and long-term reliability.
Availability
SST39VF400A-70-4I-B3KE is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive infotainment systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SST39VF400A-70-4I-B3KE 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 specializing in microcontrollers, analog devices, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF series is part of Microchip's legacy SuperFlash-based parallel NOR flash product line, designed specifically for embedded systems requiring robust, low-voltage, pin-compatible replacements for older EPROM and EEPROM technologies.
FAQ
What is the operating temperature range for SST39VF400A-70-4I-B3KE?
The SST39VF400A-70-4I-B3KE is rated for industrial temperature operation from –40°C to +85°C, verified per Microchip's DS25001A datasheet. This makes it suitable for deployment in harsh environments such as factory-floor controllers or outdoor networking gear where ambient conditions exceed commercial-grade limits. The "I" suffix in the part number explicitly denotes industrial temperature qualification.
Does SST39VF400A-70-4I-B3KE require an external VPP voltage for programming?
No, the SST39VF400A-70-4I-B3KE does not require an external VPP voltage. It generates all necessary high-voltage programming signals internally using its on-chip charge pump, enabling full program and erase functionality using only the 2.7–3.6 V VDD supply. This simplifies board design by eliminating VPP routing, regulators, and associated decoupling components.
How many erase sectors does SST39VF400A-70-4I-B3KE have, and what is their size?
The SST39VF400A-70-4I-B3KE contains 128 uniform erase sectors, each sized at 2 KWords (4 KBytes), as confirmed in Table 8 of DS25001A. This granularity allows precise firmware patching-for example, updating a single driver module without erasing the entire boot image-reducing update time and wear on unrelated memory regions.
Is SST39VF400A-70-4I-B3KE pin-compatible with SST39LF400A-70-4I-B3KE?
Yes, SST39VF400A-70-4I-B3KE is pin-compatible with SST39LF400A-70-4I-B3KE, sharing identical TSOP-48 pinout, signal definitions, and command set. The key difference is supply voltage: SST39VF400A operates down to 2.7 V, while SST39LF400A requires 3.0–3.6 V. This allows direct substitution in existing designs when migrating to lower-voltage power architectures.
What methods does SST39VF400A-70-4I-B3KE provide for detecting completion of program or erase operations?
The SST39VF400A-70-4I-B3KE provides two hardware-supported status detection methods: Data# Polling (monitoring DQ7) and Toggle Bit (monitoring DQ6). Both are accessible during active program/erase cycles and require no additional hardware-only software polling. DQ7 returns complemented data until completion; DQ6 toggles between 0 and 1 until the operation finishes, then stabilizes.
SST39VF400A-70-4I-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tray
- 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-TFBGA
SST39VF400A-70-4I-B3KE FAQ
1.How can I place an order for SST39VF400A-70-4I-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4I-B3KE 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-B3KE reliable?
The price and inventory of SST39VF400A-70-4I-B3KE 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-B3KE is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-B3KE?
SST39VF400A-70-4I-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4I-B3KE 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-B3KE?
For technical support, including SST39VF400A-70-4I-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF400A-70-4I-B3KE requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4I-B3KE 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-B3KE meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-B3KE?
All SST39VF400A-70-4I-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4I-B3KE, 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-B3KE part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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