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Microchip Technology SST39VF400A-70-4I-M1QE-T
- Part No.:
- SST39VF400A-70-4I-M1QE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39VF400A-70-4I-M1QE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,968
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Product details
Overview
SST39VF400A-70-4I-M1QE-T 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 sector/block erase, 14 µs word-program, and >100-year data retention for embedded firmware storage in industrial control systems.
For engineers reviewing the SST39VF400A-70-4I-M1QE-T datasheet, SST39VF400A-70-4I-M1QE-T pinout, SST39VF400A-70-4I-M1QE-T application, or SST39VF400A-70-4I-M1QE-T equivalent, key selection criteria include voltage range compatibility (2.7–3.6 V), TSOP-48 package footprint, 70 ns read timing, SuperFlash reliability (100k endurance cycles), and software/hardware write protection support.
Technical Context
The SST39VF400A-70-4I-M1QE-T implements SST's proprietary SuperFlash technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count. It supports JEDEC-standard command sets including Software Data Protection (SDP) with three-byte unlock sequences for programming and six-byte sequences for sector/block/chip erase.
It features dual end-of-write detection via DQ7 Data# Polling and DQ6 Toggle Bit, operates in standard Read, Word-Program, Sector-Erase (2 KWord), Block-Erase (32 KWord), and Chip-Erase modes, and conforms to CFI Query mode for automatic device identification in system boot loaders.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), directly maps to 512 KB addressable space for firmware image storage |
| Read Access Time | 70 ns - determines maximum bus clock rate in 16-bit parallel interfaces (e.g., ≤14 MHz sustained) |
| Supply Voltage | 2.7–3.6 V - enables direct interfacing with 3.3 V logic without level-shifting in industrial MCU designs |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over 10+ years in deployed equipment |
| Data Retention | >100 years - ensures long-term integrity of boot code and calibration tables without refresh |
| Word-Program Time | 14 µs typical - enables fast incremental updates during runtime without blocking host CPU for extended periods |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB) - allows selective update of application partitions while preserving bootloader |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mount. Pinout validated per Figure 2 (DS25001A, p.3) for SST39VF400A variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used; A17 selects upper half of 256K-word array (required for full 4 Mbit addressing) |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; latched internally during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select - must be low to enable any operation; controls standby current (3 µA) |
| OE# | Output Enable | Active-low output gate - enables read data only when CE# and OE# both low |
| WE# | Write Enable | Active-low control for program/erase - initiates command latching on falling/rising edges per JEDEC sequence |
| VDD | Power Supply | 2.7–3.6 V supply - powers core and I/O; internal charge pump generates VPP for erase/program |
| VSS | Ground | Two dedicated ground pins (pins 23 and 48) - reduce noise coupling in high-speed reads |
| NC | No Connect | Pins 9, 10, 12–16, 18, 19, 21, 22, 24, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47 - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture provides fixed 14 µs program and 18 ms sector/block erase times across full lifetime |
| Software Data Protection | JEDEC-compliant 3-byte unlock (5555H/AAH → 2AAAH/55H → 5555H/A0H) prevents accidental writes during power transitions |
| Hardware Write Inhibit | Automatic disable when VDD < 1.5 V or WE#/CE#/OE# in invalid states - eliminates need for external reset supervisors |
| CFI Query Mode | Standardized register map (entry: 5555H/98H) enables auto-detection of density, timing, and erase parameters in BIOS/bootloader |
| Uniform Erase Architecture | 128 sectors × 4 KB + 8 blocks × 64 KB - simplifies flash translation layer (FTL) design for wear leveling and bad-block management |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile x16 parallel flash memory serving as primary code storage with 70 ns read access synchronized to 14 MHz bus clocks. Use Value: 2.7–3.6 V operation tolerates brown-out conditions; 100k endurance supports quarterly firmware patches; >100-year retention avoids recalibration drift. | Use Scenario: Holding certified bootloader and safety-critical initialization routines in FDA-regulated diagnostic imaging equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant firmware repository with hardware/software write protection and CFI-based validation at power-on. Use Value: Dual end-of-write detection (DQ6/DQ7) ensures deterministic update completion; industrial temp range (-40°C to +85°C) guarantees reliability in MRI/CT thermal environments. |
| Automotive Body Control Module | Networking Equipment Configuration Storage |
Use Scenario: Storing vehicle-specific configuration data (e.g., door lock settings, mirror positions) in body control units subject to automotive temperature cycling. IC Role / Device Role / Timing Role: JEDEC-pin-compatible flash memory interfaced to 16-bit microcontroller buses with sector-erase capability for parameter updates. Use Value: RoHS-compliant TSOP-48 package meets automotive solder reflow standards; 4 KB sector granularity enables atomic parameter group writes without corrupting adjacent settings. | Use Scenario: Retaining switch/router configuration profiles and firmware images across power cycles in enterprise Ethernet switches. IC Role / Device Role / Timing Role: High-reliability parallel flash providing fast read access for boot-time configuration loading and background firmware staging. Use Value: 64 KB block-erase enables rapid firmware swap during zero-downtime upgrades; 3 µA standby current minimizes power draw in always-on management subsystems. |
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-M1QE-T | Commercial temperature grade (0°C to +70°C) vs. industrial (-40°C to +85°C); identical electrical specs and pinout | Suitable for office/indoor non-critical systems; not rated for extended thermal stress or automotive under-hood use | Select when cost sensitivity outweighs extended temperature requirement and ambient stays within 0–70°C |
| MX29LV400CBTI-70G | 4 Mbit x16 flash with 70 ns access, but uses different command set (no CFI), higher 5 mA active current, and no SuperFlash fixed-timing guarantee | Lacks standardized CFI query and deterministic erase timing - increases bootloader complexity and field update risk | Choose only if legacy design already uses Macronix command protocol and thermal margin permits higher power dissipation |
Compared with SST39VF400A-70-4C-M1QE-T, the SST39VF400A-70-4I-M1QE-T adds industrial temperature resilience without sacrificing speed or endurance; versus MX29LV400CBTI-70G, it delivers superior reliability assurance via SuperFlash architecture and standardized CFI support for automated system integration.
Availability
SST39VF400A-70-4I-M1QE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, automotive body electronics, and networking infrastructure requiring stable component supply, long-term obsolescence management, and RoHS-compliant manufacturing.
Supply support for SST39VF400A-70-4I-M1QE-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 devices, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39VF400A-70-4I-M1QE-T belongs to the SST39VFx00A Multi-Purpose Flash family, designed specifically for cost-sensitive, high-reliability embedded applications requiring flexible in-system firmware updates and long data retention without battery backup.
FAQ
What is the guaranteed operating temperature range for the SST39VF400A-70-4I-M1QE-T?
The SST39VF400A-70-4I-M1QE-T is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the DS25001A datasheet Section "Operating Range: SST39VF200A/400A/800A". This specification applies to all DC and AC parameters, including 70 ns read access time and 2.7–3.6 V supply operation, making SST39VF400A-70-4I-M1QE-T suitable for harsh-environment deployments where commercial-grade parts would fail.
Does the SST39VF400A-70-4I-M1QE-T require an external VPP voltage for programming or erasing?
No, the SST39VF400A-70-4I-M1QE-T integrates an internal charge pump to generate the high-voltage VPP required for erase and program operations. As stated in the datasheet "Features" section, it supports "Internal VPP Generation", eliminating the need for external high-voltage supplies and simplifying board design. All write operations are performed using only the 2.7–3.6 V VDD supply applied to the SST39VF400A-70-4I-M1QE-T.
How many address lines does the SST39VF400A-70-4I-M1QE-T require to access its full 4 Mbit capacity?
The SST39VF400A-70-4I-M1QE-T requires 18 address lines (A0–A17) to access its full 256K × 16 organization. Per Table 1 and Figure 2 of DS25001A, A17 is the most significant address bit for the 4 Mbit variant (SST39VF400A), distinguishing it from the 2 Mbit (A16) and 8 Mbit (A18) variants. All 18 lines must be driven correctly for full memory mapping in systems using SST39VF400A-70-4I-M1QE-T.
Can the SST39VF400A-70-4I-M1QE-T be used as a drop-in replacement for the SST39LF400A-70-4I-M1QE-T?
No - the SST39VF400A-70-4I-M1QE-T and SST39LF400A-70-4I-M1QE-T are not drop-in replacements due to differing supply voltage requirements: SST39VF400A-70-4I-M1QE-T operates at 2.7–3.6 V, while SST39LF400A-70-4I-M1QE-T requires 3.0–3.6 V. Although pinout, timing, and command sets are identical, applying 2.7 V to the LF variant may cause functional failure. SST39VF400A-70-4I-M1QE-T is not a direct substitute unless the system's VDD rail is verified to stay ≥3.0 V.
What package type is used in the SST39VF400A-70-4I-M1QE-T part number suffix "M1QE-T"?
Per Microchip's packaging nomenclature and DS25001A Figure 2, the "M1QE-T" suffix denotes a 48-lead Thin Small Outline Package (TSOP) with 12 mm × 20 mm dimensions, lead-free (RoHS-compliant) finish, and tape-and-reel packaging. This matches the standard TSOP-48 footprint used across the SST39VFx00A family and is distinct from TFBGA, WFBGA, or XFLGA variants offered for the same device.
SST39VF400A-70-4I-M1QE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WFBGA (6x4)
SST39VF400A-70-4I-M1QE-T FAQ
1.How can I place an order for SST39VF400A-70-4I-M1QE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF400A-70-4I-M1QE-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-M1QE-T reliable?
The price and inventory of SST39VF400A-70-4I-M1QE-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-M1QE-T is usually 5 days.
3.What payment methods are accepted for SST39VF400A-70-4I-M1QE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF400A-70-4I-M1QE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF400A-70-4I-M1QE-T?
SST39VF400A-70-4I-M1QE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF400A-70-4I-M1QE-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-M1QE-T?
For technical support, including SST39VF400A-70-4I-M1QE-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-M1QE-T requirements.
6.How does Aetrix verify that SST39VF400A-70-4I-M1QE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF400A-70-4I-M1QE-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-M1QE-T meets industry standards.
7.What is the process for return or replacement of SST39VF400A-70-4I-M1QE-T?
All SST39VF400A-70-4I-M1QE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF400A-70-4I-M1QE-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-M1QE-T part is unused and in its original packaging.
Return procedure for SST39VF400A-70-4I-M1QE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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