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Microchip Technology SST39WF400A-90-4C-M1QE
- Part No.:
- SST39WF400A-90-4C-M1QE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39WF400A-90-4C-M1QE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
SST39WF400A-90-4C-M1QE from Silicon Storage Technology is a 4 Mbit (256K × 16) single-supply Multi-Purpose Flash memory IC with 90 ns read access time, 1.65–1.95 V operation, and SuperFlash technology enabling 100,000 program/erase cycles and >100-year data retention. It supports sector-, block-, and chip-erase modes and is used in embedded firmware storage for industrial controllers requiring low-voltage, high-reliability nonvolatile memory.
For engineers reviewing the SST39WF400A-90-4C-M1QE datasheet, SST39WF400A-90-4C-M1QE pinout, SST39WF400A-90-4C-M1QE application, or SST39WF400A-90-4C-M1QE equivalent, this page delivers verified electrical parameters, JEDEC-compliant x16 interface behavior, TFBGA-48 package mapping, and real-world erase/program timing values - all confirmed from the official EOL datasheet S71220-07-EOL.
Technical Context
The SST39WF400A-90-4C-M1QE implements an asynchronous x16 parallel interface with CE#, OE#, and WE# control logic, supporting standard microprocessor bus protocols. Its SuperFlash split-gate cell architecture enables fixed 28 µs word-program and 36 ms sector/block-erase times independent of wear level.
It integrates on-chip hardware write inhibition (VDD power-up/down detection, noise/glitch protection) and JEDEC-standard Software Data Protection (SDP) requiring three-byte unlock sequences for programming and six-byte sequences for erasure. CFI Query mode (0x98 command) provides standardized device geometry and timing metadata at runtime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), providing 512 KB of addressable storage space |
| Read Access Time | 90 ns at 1.70–1.95 V - defines minimum bus cycle duration for reliable read operations |
| Supply Voltage | 1.65–1.95 V - single VDD rail eliminates need for external voltage translators in 1.8 V systems |
| Endurance | 100,000 program/erase cycles - enables frequent field firmware updates without premature wear-out |
| Data Retention | >100 years at 25°C - ensures long-term reliability in unpowered storage applications |
| Erase Granularity | Uniform 2 KWord sectors (4 KB) and 32 KWord blocks (64 KB) - balances flexibility and speed for partial updates |
| Program Time | 28 µs typical word-program - enables fast incremental writes without blocking system execution |
| Standby Current | 1 µA typical - minimizes quiescent power in battery-backed or always-on embedded systems |
Pinout & Package
Package: 48-ball Thin Fine-Pitch Ball Grid Array (TFBGA), 6 mm × 8 mm footprint, 0.5 mm ball pitch. Compliant with JEDEC MO-245.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17 selects most significant address for sector/block addressing |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; tri-stated when CE# or OE# is high |
| CE# | Chip Enable | Active-low device select; disables outputs and reduces current to 1 µA in standby |
| OE# | Output Enable | Active-low output gate; controls data bus drive without affecting internal state |
| WE# | Write Enable | Active-low control for latching addresses/data during program/erase command sequences |
| VDD | Power Supply | 1.65–1.95 V core supply; powers internal charge pump for erase/program operations |
| VSS | Ground | Reference return path for all digital and analog circuitry |
| NC | No Connection | Unbonded balls - must be left floating or grounded per PCB design rules |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Fixed 28 µs program and 36 ms erase times across full endurance life - eliminates software de-rating or timing margin expansion |
| JEDEC-Compliant Interface | Standard x16 flash pinout and command set (including CFI Query) - ensures drop-in compatibility with existing 16-bit memory controllers |
| Hardware + Software Write Protection | VDD power-up detection, 5 ns glitch immunity, and mandatory 3-/6-byte SDP unlock sequences - prevents accidental corruption during brown-out or reset |
| End-of-Write Detection | DQ7 Data# Polling and DQ6 Toggle Bit status reporting - enables efficient polling without dedicated status registers or interrupts |
| Low-Voltage Operation | 1.65–1.95 V VDD range - supports direct interfacing with 1.8 V logic families without level shifters |
| Multi-Granularity Erase | Independent 4 KB sector, 64 KB block, and full-chip erase - optimizes update time and wear leveling in firmware partitioning schemes |
Applications
| Firmware Storage in PLCs | BIOS/Boot Code in Industrial HMIs |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with guaranteed 100,000-cycle endurance and >100-year retention under thermal stress. Use Value: Enables remote firmware upgrades without hardware replacement, reducing maintenance downtime and lifecycle cost. |
Use Scenario: Holding boot firmware and configuration data for human-machine interface panels deployed in manufacturing cells. IC Role / Device Role / Timing Role: Primary boot memory accessed via 16-bit parallel bus during cold start; 90 ns access ensures fast boot sequence. Use Value: Single 1.8 V supply simplifies power design; sector-erase allows safe patching of UI assets without corrupting bootloader. |
| Configuration Memory in Medical Devices | FPGA Configuration Storage |
|
Use Scenario: Retaining calibration tables and user preferences in Class II medical instruments requiring regulatory traceability and long service life. IC Role / Device Role / Timing Role: Secure, write-protected parameter storage with hardware/software dual-lock protection against unintended modification. Use Value: Meets IEC 62304 data integrity requirements; 1 µA standby current extends battery backup duration during power loss. |
Use Scenario: Storing bitstream images for SRAM-based FPGAs in test equipment where reconfiguration must occur rapidly after power-on. IC Role / Device Role / Timing Role: High-speed parallel configuration source; 28 µs word-program enables fast bitstream patching between test runs. Use Value: Block-erase capability allows full reconfiguration in ≤36 ms - faster than serial flash alternatives and compatible with FPGA init protocols. |
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, 90 ns, 2.7–3.6 V supply - requires level-shifting for 1.8 V systems | Lacks 1.8 V native support; higher VDD increases system power and heat dissipation | Select only if legacy 3.3 V infrastructure exists and voltage translation is acceptable |
| S29AL032D90TFI020 | 32 Mbit x16, 90 ns, 2.7–3.6 V - larger density but incompatible voltage range and command set | Not pin-compatible; requires PCB redesign and firmware driver changes | Consider only for new designs needing higher density and willing to accept 3.3 V constraints |
Compared with MX29LV400CBTI-90G and S29AL032D90TFI020, the SST39WF400A-90-4C-M1QE uniquely delivers 1.8 V native operation, SuperFlash timing stability, and JEDEC-compliant SDP - making it the only option for low-power, high-endurance, drop-in replacement in existing 16-bit 1.8 V embedded platforms.
Availability
SST39WF400A-90-4C-M1QE is available at Aetrix Electronics and suitable for industrial HMIs, medical device configuration storage, and PLC firmware updates requiring stable component supply, long-term lifecycle support, and guaranteed EOL notification.
Supply support for SST39WF400A-90-4C-M1QE 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) was a fabless semiconductor company specializing in high-reliability flash memory, acquired by Microchip Technology in 2010. Known for SuperFlash technology and robust industrial-grade qualification.
The SST39WF400A product line targets embedded systems requiring low-voltage, high-endurance nonvolatile memory for firmware, configuration, and data logging - optimized for 1.8 V microcontroller buses and extended temperature operation.
FAQ
What is the operating voltage range for the SST39WF400A-90-4C-M1QE?
The SST39WF400A-90-4C-M1QE operates exclusively within 1.65 V to 1.95 V. Per Table 12 of the EOL datasheet S71220-07-EOL, the 90 ns speed grade is only guaranteed at 1.70–1.95 V - applying 1.65 V may result in marginal timing compliance. This narrow range enables direct integration with 1.8 V logic without level shifters, and the device includes on-chip VDD monitoring to inhibit writes below 1.0 V.
Does the SST39WF400A-90-4C-M1QE support both sector and block erase?
Yes, the SST39WF400A-90-4C-M1QE supports both uniform 2 KWord (4 KB) sector erase and 32 KWord (64 KB) block erase, as confirmed in the FEATURES section and Figure 11/12 timing diagrams. Sector-erase uses AMS–A11 address lines; block-erase uses AMS–A15. Both complete in 36 ms typical, and each requires a distinct six-byte command sequence initiated at address 5555H.
How is write completion detected on the SST39WF400A-90-4C-M1QE?
The SST39WF400A-90-4C-M1QE provides two hardware-supported methods: DQ7 Data# Polling (complement-to-data toggle) and DQ6 Toggle Bit (alternating 1/0 until operation completes). Both are valid after the fourth WE# pulse for programming and sixth WE# pulse for erasure. The datasheet explicitly states these are the only valid reads during internal operations - no status register or interrupt is required.
Is the SST39WF400A-90-4C-M1QE pin-compatible with other 48-ball BGA flash devices?
The SST39WF400A-90-4C-M1QE uses a JEDEC-standard x16 flash pinout (per Figure 2 and Table 2), but pin compatibility with other 48-ball BGAs depends on exact ball map alignment. Its TFBGA-48 layout matches JEDEC MO-245 mechanical specs, yet signal assignments (e.g., A17 as AMS) and timing behavior (e.g., 90 ns vs. 100 ns) differ from non-SST parts. Always verify layout against SST's Figure 2 before substitution.
What packaging options does the SST39WF400A-90-4C-M1QE use?
The SST39WF400A-90-4C-M1QE is packaged in a 48-ball Thin Fine-Pitch BGA (TFBGA) measuring 6 mm × 8 mm with 0.5 mm pitch, as shown in Figure 2 of the datasheet. The "M1QE" suffix specifically denotes this TFBGA variant. Other variants include WFBGA, XFLGA, and XFBGA packages - but M1QE is not interchangeable with those due to different footprint and solder ball arrangement.
SST39WF400A-90-4C-M1QE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- 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-WFBGA (6x4)
SST39WF400A-90-4C-M1QE FAQ
1.How can I place an order for SST39WF400A-90-4C-M1QE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39WF400A-90-4C-M1QE 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-M1QE reliable?
The price and inventory of SST39WF400A-90-4C-M1QE 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-M1QE is usually 5 days.
3.What payment methods are accepted for SST39WF400A-90-4C-M1QE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39WF400A-90-4C-M1QE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39WF400A-90-4C-M1QE?
SST39WF400A-90-4C-M1QE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39WF400A-90-4C-M1QE 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-M1QE?
For technical support, including SST39WF400A-90-4C-M1QE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39WF400A-90-4C-M1QE requirements.
6.How does Aetrix verify that SST39WF400A-90-4C-M1QE is sourced from the original manufacturer or authorized distributors?
All SST39WF400A-90-4C-M1QE 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-M1QE meets industry standards.
7.What is the process for return or replacement of SST39WF400A-90-4C-M1QE?
All SST39WF400A-90-4C-M1QE units undergo pre-shipment inspection (PSI). If there is an issue with SST39WF400A-90-4C-M1QE, 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-M1QE part is unused and in its original packaging.
Return procedure for SST39WF400A-90-4C-M1QE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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