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Microchip Technology SST39WF400A-90-4C-B3KE
- Part No.:
- SST39WF400A-90-4C-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39WF400A-90-4C-B3KE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,867
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Product details
Overview
SST39WF400A-90-4C-B3KE from Silicon Storage Technology is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC with SuperFlash technology, operating at 1.65–1.95 V, 90 ns read access time, and JEDEC-standard x16 asynchronous interface. It delivers high endurance (100,000 cycles), >100-year data retention, and supports sector/block/chip erase for embedded firmware storage in industrial controllers and network edge devices.
For engineers reviewing the SST39WF400A-90-4C-B3KE datasheet, SST39WF400A-90-4C-B3KE pinout, SST39WF400A-90-4C-B3KE application, or SST39WF400A-90-4C-B3KE equivalent, this page provides verified package mapping (48-ball TFBGA), validated Word-Program timing (40 µs max), confirmed JEDEC-compliant command set, and real-world erase architecture (128 uniform 2 KWord sectors, 8 uniform 32 KWord blocks).
Technical Context
The SST39WF400A-90-4C-B3KE implements a split-gate SuperFlash cell with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash where timing degrades with wear. Its internal VPP generation eliminates external high-voltage supply requirements during write operations.
It uses standard microprocessor bus control (CE#, OE#, WE#) with latched address/data and supports two end-of-write detection methods: Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after rising edge of fourth (program) or sixth (erase) WE#/CE# pulse. The device conforms to JEDEC pinouts and command sets for x16 flash memories.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables 16-bit parallel data transfers without byte-lane multiplexing. |
| Read Access Time | 90 ns (max); guarantees deterministic timing for real-time boot code fetch in MCU-based systems. |
| Supply Voltage | 1.65–1.95 V; compatible with low-voltage 1.8 V system rails and eliminates need for level shifters. |
| Endurance | 100,000 program/erase cycles (typical); supports frequent field firmware updates in industrial gateways. |
| Data Retention | >100 years; ensures long-term reliability in unattended infrastructure equipment without refresh. |
| Erase Architecture | 128 × 2 KWord sectors + 8 × 32 KWord blocks; allows granular firmware partitioning and partial update capability. |
| Word-Program Time | 40 µs (max); enables fast patch writes without blocking host CPU for extended periods. |
Pinout & Package
Package: 48-ball Thin Fine-Pitch Ball Grid Array (TFBGA), 6 mm × 8 mm, 0.8 mm ball pitch - RoHS-compliant surface-mount package optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 select 256K words; A17 (AMS) used for sector/block address decoding during erase commands. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; tri-stated when CE# or OE# is high; latched on WE#/CE# edges during writes. |
| CE# | Chip Enable | Active-low chip select; device enters standby (1 µA) when high; required low for all read/write operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive; high-Z state prevents bus contention during idle. |
| WE# | Write Enable | Active-low write strobe; controls latching of address/data and initiates internal program/erase sequences. |
| VDD | Power Supply | 1.65–1.95 V core supply; powers logic and SuperFlash array; internal charge pump generates programming voltage. |
| VSS | Ground | Reference ground for all signals and internal circuitry; two dedicated VSS balls ensure low-impedance return path. |
| NC | No Connection | Unbonded pads (e.g., A1, A2, A3, A5, A7, A9, A10, A11, A12, A13, A14, A15, A16 in TFBGA layout); must be left floating. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide injector enables fixed 90 ns read and 40 µs program times across full lifetime-no software derating required. |
| Software Data Protection (SDP) | JEDEC-compliant 3-byte (program) and 6-byte (erase) command sequences prevent accidental writes during power transitions. |
| End-of-Write Detection | DQ7 (Data# Polling) and DQ6 (Toggle Bit) provide deterministic, non-blocking status reporting without requiring external timers. |
| Common Flash Interface (CFI) | Embedded CFI query table (accessible via 98H command) enables automatic driver configuration and cross-manufacturer compatibility. |
| Hardware Write Inhibit | Glitch protection (<5 ns pulses ignored), VDD lockout (<1.0 V), and OE#/CE#/WE# gating prevent spurious writes at power-up/down. |
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 with wide temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; accessed via standard x16 asynchronous bus with 90 ns read latency. Use Value: 100,000-cycle endurance supports quarterly firmware patches over 10+ years; >100-year retention eliminates recalibration drift concerns in sealed enclosures. |
Use Scenario: Holding calibrated sensor coefficients and regulatory-compliant device settings in portable ultrasound and infusion pumps requiring traceable configuration history. IC Role / Device Role / Timing Role: Secure configuration store with Software Data Protection; sector-erase enables safe parameter reset without losing calibration data. Use Value: JEDEC-standard command set ensures interoperability with legacy bootloader firmware; CFI support simplifies qualification across product variants. |
| Network Edge Router Boot Image | Automotive Telematics Module Code Storage |
|
Use Scenario: Hosting compressed U-Boot and Linux kernel images in compact 5G small-cell base stations where board space and power are constrained. IC Role / Device Role / Timing Role: Primary boot memory accessed at power-on reset; 1.8 V operation reduces system-level power conversion losses. Use Value: 48-ball TFBGA footprint (6 × 8 mm) fits tight RF module layouts; uniform 2 KWord sectors allow atomic OTA image swaps with minimal downtime. |
Use Scenario: Storing CAN FD firmware and vehicle-specific calibration maps in telematics control units subject to automotive AEC-Q100 stress testing. IC Role / Device Role / Timing Role: High-reliability code storage with guaranteed 10,000-cycle minimum endurance per JEDEC A117 and 100-year retention per A103. Use Value: Dual erase modes (sector + block) enable modular firmware updates-e.g., radio stack vs. diagnostics-without full reflash overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CTTI-90G | 3.3 V supply (vs. 1.8 V); 48-pin TSOP package; no internal VPP generation; slower 100 ns access. | Requires level shifting in 1.8 V systems; larger footprint; higher active current (15 mA vs. 5 mA typical). | Select only if legacy 3.3 V design compatibility is mandatory and power budget permits. |
| S29AL016J70TFI020 | 3.0 V supply; 48-ball BGA; 16 Mbit density; 70 ns access; requires external VPP for programming. | Higher density but incompatible voltage domain; lacks SuperFlash fixed-timing guarantee; no CFI support in base config. | Consider for capacity upgrade paths where 1.8 V operation and lifetime timing stability are not critical. |
Compared with MX29LV400CTTI-90G and S29AL016J70TFI020, the SST39WF400A-90-4C-B3KE uniquely delivers 1.8 V operation with internal VPP, fixed 90 ns/40 µs timing across its lifetime, and JEDEC-compliant CFI-making it optimal for new low-power, long-lifecycle embedded designs.
Availability
SST39WF400A-90-4C-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, network edge router boot image hosting, and automotive telematics module code storage requiring stable component supply across multi-year production cycles.
Supply support for SST39WF400A-90-4C-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
Silicon Storage Technology (SST), now part of Microchip Technology, specialized in high-reliability, low-voltage flash memory solutions using proprietary SuperFlash technology before its 2017 acquisition.
The SST39WF400A-90-4C-B3KE belongs to SST's Multi-Purpose Flash (MPF) product line, designed specifically for cost-sensitive, power-constrained embedded systems needing robust firmware and configuration storage with long-term data integrity.
FAQ
What is the operating voltage range for the SST39WF400A-90-4C-B3KE?
The SST39WF400A-90-4C-B3KE operates strictly within 1.65 V to 1.95 V. Per datasheet Table 12, the 90 ns speed grade is only guaranteed at 1.70–1.95 V; operation below 1.70 V may result in timing violations. This 1.8 V nominal range eliminates need for external voltage translation in modern low-power SoC designs.
Does the SST39WF400A-90-4C-B3KE support both sector and block erase modes?
Yes, the SST39WF400A-90-4C-B3KE supports both modes: 128 uniform 2 KWord sectors (addressed via AMS–A11) and 8 uniform 32 KWord blocks (addressed via AMS–A15). Sector-erase uses command sequence ending in 30H; block-erase ends in 50H. Both execute in ≤36 ms typical, enabling flexible firmware update strategies.
How is write completion detected on the SST39WF400A-90-4C-B3KE?
The SST39WF400A-90-4C-B3KE provides two hardware-supported methods: Data# Polling (DQ7 toggles complement/data state until completion) and Toggle Bit (DQ6 toggles between 0/1 during operation, then halts). Both are valid after the fourth WE#/CE# rising edge for programming and sixth for erasing-enabling efficient polling without timers.
Is the SST39WF400A-90-4C-B3KE pin-compatible with other 48-ball x16 flash devices?
No-while the SST39WF400A-90-4C-B3KE follows JEDEC-standard x16 pinouts, its 48-ball TFBGA footprint (6 × 8 mm) differs mechanically from TSOP or other BGA variants. Pin functions match JEDEC, but ball layout (e.g., NC placement, VSS count) is SST-specific. PCB redesign is required for migration from non-SST 48-ball packages.
What data retention and endurance specifications apply to the SST39WF400A-90-4C-B3KE?
The SST39WF400A-90-4C-B3KE is rated for >100 years of data retention and 100,000 program/erase cycles (typical), with minimum guaranteed values of 10,000 cycles and 100 years per JEDEC A117/A103. These figures are validated across commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges.
SST39WF400A-90-4C-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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:
- 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 FAQ
1.How can I place an order for SST39WF400A-90-4C-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4C-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 SST39WF400A-90-4C-B3KE reliable?
The price and inventory of SST39WF400A-90-4C-B3KE 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 is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4C-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4C-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4C-B3KE?
SST39WF400A-90-4C-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4C-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 SST39WF400A-90-4C-B3KE?
For technical support, including SST39WF400A-90-4C-B3KE 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 requirements.
6.How does Aetrix verify that SST39WF400A-90-4C-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4C-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 SST39WF400A-90-4C-B3KE meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4C-B3KE?
All SST39WF400A-90-4C-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4C-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 SST39WF400A-90-4C-B3KE part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4C-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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