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Microchip Technology SST39WF400A-90-4C-B3KE-T
- Part No.:
- SST39WF400A-90-4C-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39WF400A-90-4C-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,680
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Product details
Overview
SST39WF400A-90-4C-B3KE-T from Silicon Storage Technology, Inc. is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC with SuperFlash technology, designed for embedded program/data storage in space-constrained systems. It operates at 1.65–1.95 V, delivers 90 ns read access time, supports sector/block/chip erase, and features hardware/software data protection - used in firmware update storage for industrial controllers.
For engineers reviewing the SST39WF400A-90-4C-B3KE-T datasheet, SST39WF400A-90-4C-B3KE-T pinout, SST39WF400A-90-4C-B3KE-T application, or SST39WF400A-90-4C-B3KE-T equivalent, key selection criteria include its 1.8 V operation, uniform 2 KWord sector architecture, JEDEC-standard x16 asynchronous interface, toggle-bit/data# polling write status detection, and 48-ball TFBGA (6 mm × 8 mm) packaging.
Technical Context
The SST39WF400A-90-4C-B3KE-T implements a split-gate SuperFlash cell with thick-oxide tunneling injector, enabling fixed 28 µs word-program and 36 ms sector/block-erase times independent of endurance cycles. Its command-set architecture follows JEDEC-standard flash pinouts and uses six-byte sequences for erase operations and three-byte sequences for programming, with internal VPP generation eliminating external high-voltage requirements.
It supports dual control modes (WE#- or CE#-initiated) for all write operations, latches address/data on falling/rising edges of WE#/CE#, and provides tri-state outputs controlled by OE# and CE#. The device integrates CFI query capability and software product ID mode for system-level identification and compatibility verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables 16-bit parallel data bus interfacing with microcontrollers and SoCs. |
| Read Access Time | 90 ns (at VDD = 1.70–1.95 V); meets timing requirements for high-speed boot code execution in real-time systems. |
| Supply Voltage | 1.65–1.95 V; compatible with low-power 1.8 V logic domains without level-shifting circuitry. |
| Endurance | 100,000 program/erase cycles (typical); supports frequent field firmware updates over product lifetime. |
| Data Retention | >100 years (25 °C); ensures long-term reliability for unattended industrial and infrastructure applications. |
| Erase Granularity | Uniform 2 KWord sectors and 32 KWord blocks; allows selective firmware patching without full chip reprogramming. |
| Write Detection | Toggle Bit (DQ6) and Data# Polling (DQ7); enables efficient host polling without dedicated status pins or interrupts. |
Pinout & Package
Package: 48-ball TFBGA (6 mm × 8 mm), RoHS-compliant, bottom-side ball layout per Figure 2 of datasheet S71220-07-EOL.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus (AMS = A17); A0–A10 select words within sector/block; A11–A17 define sector/block boundaries. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; tri-stated when CE# or OE# is high; latched during write via WE#/CE# edge timing. |
| CE# | Chip Enable | Active-low device select; must be low for read/write; high-Z output state when asserted high. |
| OE# | Output Enable | Active-low output gate; controls data bus drive only; does not affect internal operations when high. |
| WE# | Write Enable | Active-low write control; initiates latching of address/data and triggers internal program/erase sequences. |
| VDD | Power Supply | 1.65–1.95 V core supply; powers logic and SuperFlash array; requires local decoupling per JEDEC guidelines. |
| VSS | Ground | Reference ground for all I/O and core circuits; two dedicated VSS balls ensure low-impedance return path. |
| NC | No Connection | Unbonded pads (e.g., A1, A2, A3, A5, A6, A7, A9, A10, A11, A12, A13, A14, A15, A16 in TFBGA); must remain floating. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector enables fixed 28 µs program and 36 ms erase times across full endurance life - eliminates software de-rating. |
| JEDEC x16 Interface | Fully compliant with JEDEC Standard 48-pin flash pinouts and command sets - ensures drop-in compatibility with existing 16-bit memory controllers. |
| Software Data Protection | Three-byte sequence required for program, six-byte for erase; prevents accidental writes during power-up/down or noise events. |
| CFI Query Support | Accessible via 98H command at 5555H; returns standardized geometry, timing, and voltage tables - simplifies auto-detection in bootloader firmware. |
| Low Standby Current | 1 µA typical (52 µA max); reduces quiescent power in battery-backed or always-on embedded systems. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller's external bus; accessed via standard x16 asynchronous read/write cycles. Use Value: 90 ns read speed enables deterministic boot timing; sector-erase capability permits incremental firmware patches without full reflash downtime. |
Use Scenario: Holding calibrated sensor parameters and regulatory-compliant configuration profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration storage with hardware/software write protection; retains settings across 10+ year service life. Use Value: >100-year data retention and 100,000-cycle endurance meet IEC 62304 Class C software lifecycle requirements. |
| Telecom Base Station Bootloader | Automotive Infotainment OTA Module |
|
Use Scenario: Hosting primary bootloader and recovery image in wireless infrastructure units requiring zero-downtime upgrades. IC Role / Device Role / Timing Role: Dual-image flash partitioned into active/inactive banks; erased and programmed under host CPU control. Use Value: Block-erase (32 KWord) enables fast bank switching; CFI support allows runtime identification of memory geometry for safe OTA validation. |
Use Scenario: Storing encrypted firmware images and cryptographic keys in head-unit ECUs receiving over-the-air updates. IC Role / Device Role / Timing Role: Trusted execution environment (TEE)-adjacent secure storage; isolated via hardware write inhibit during power transitions. Use Value: VDD power-up/down detection and 5 ns noise immunity prevent corruption during vehicle ignition cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-90G | 4 Mbit x16, 3.0 V operation (2.7–3.6 V), 90 ns access, 100K endurance, no internal VPP generation. | Requires external 12 V VPP for programming; incompatible with 1.8 V systems without level shifters. | Select only if legacy 3 V design exists and voltage translation is acceptable. |
| S29AL004DT90TFI020 | 4 Mbit x16, 3.0 V operation, 90 ns access, 100K endurance, supports CFI but lacks software ID mode. | Does not support Software Product ID entry/exit; limits multi-vendor socket interoperability in field-upgradable systems. | Prefer when CFI-only identification suffices and 3 V supply is guaranteed. |
Compared with MX29LV400CBTI-90G and S29AL004DT90TFI020, the SST39WF400A-90-4C-B3KE-T uniquely supports 1.8 V operation with internal VPP, fixed erase times across endurance life, and software ID mode - critical for compact, low-power, multi-source embedded designs.
Availability
SST39WF400A-90-4C-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, telecom base station bootloaders, and automotive infotainment OTA modules requiring stable component supply and long-term obsolescence management.
Supply support for SST39WF400A-90-4C-B3KE-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
Silicon Storage Technology, Inc. (SST) was a fabless semiconductor company specializing in high-reliability nonvolatile memory solutions, acquired by Microchip Technology in 2010. SST pioneered SuperFlash technology for enhanced endurance and data retention.
The SST39WF400A-90-4C-B3KE-T belongs to SST's Multi-Purpose Flash (MPF) product line, engineered for cost-sensitive, low-voltage embedded systems requiring robust firmware and configuration storage with minimal power and board space.
FAQ
What is the operating voltage range for the SST39WF400A-90-4C-B3KE-T?
The SST39WF400A-90-4C-B3KE-T operates from 1.65 V to 1.95 V, with the 90 ns access time specified only at 1.70–1.95 V. This 1.8 V nominal range eliminates need for external level shifters in modern low-power microcontroller designs and ensures compatibility with I/O standards like 1.8 V LVCMOS.
Does the SST39WF400A-90-4C-B3KE-T require an external VPP voltage for programming?
No, the SST39WF400A-90-4C-B3KE-T generates internal VPP for all program and erase operations, removing the need for external high-voltage circuitry. This simplifies PCB layout, reduces BOM count, and improves reliability compared to legacy 3 V flash devices requiring 12 V VPP.
How does the SST39WF400A-90-4C-B3KE-T indicate completion of a program or erase operation?
The SST39WF400A-90-4C-B3KE-T provides two software-controlled status detection methods: Toggle Bit (DQ6 toggles until operation completes) and Data# Polling (DQ7 complements during operation, then returns true data). Both are accessible via standard read cycles without additional hardware signals.
What package type is used for the SST39WF400A-90-4C-B3KE-T?
The SST39WF400A-90-4C-B3KE-T uses a 48-ball TFBGA package measuring 6 mm × 8 mm. Pin assignments match Figure 2 of datasheet S71220-07-EOL, with dedicated VDD/VSS balls and NC positions clearly defined for layout compliance.
Is the SST39WF400A-90-4C-B3KE-T compatible with JEDEC-standard flash memory controllers?
Yes, the SST39WF400A-90-4C-B3KE-T conforms fully to JEDEC-standard pinouts and command sets for x16 flash memories. It supports standard read, program, and sector/block/chip erase sequences, enabling seamless integration with existing memory controller IP and bootloader firmware.
SST39WF400A-90-4C-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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:
- 40µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFBGA
SST39WF400A-90-4C-B3KE-T FAQ
1.How can I place an order for SST39WF400A-90-4C-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4C-B3KE-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 SST39WF400A-90-4C-B3KE-T reliable?
The price and inventory of SST39WF400A-90-4C-B3KE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39WF400A-90-4C-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4C-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4C-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4C-B3KE-T?
SST39WF400A-90-4C-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4C-B3KE-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 SST39WF400A-90-4C-B3KE-T?
For technical support, including SST39WF400A-90-4C-B3KE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400A-90-4C-B3KE-T requirements.
6.How does Aetrix verify that SST39WF400A-90-4C-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4C-B3KE-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 SST39WF400A-90-4C-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4C-B3KE-T?
All SST39WF400A-90-4C-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4C-B3KE-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 SST39WF400A-90-4C-B3KE-T part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4C-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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