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Microchip Technology SST39LF402C-55-4C-MAQE-T
- Part No.:
- SST39LF402C-55-4C-MAQE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39LF402C-55-4C-MAQE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,227
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Product details
Overview
SST39LF402C-55-4C-MAQE-T from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, operating at 3.0–3.6 V supply, 55 ns read access time, and hardware top-block protection for boot code storage in embedded controllers and firmware update systems.
For engineers reviewing the SST39LF402C-55-4C-MAQE-T datasheet, SST39LF402C-55-4C-MAQE-T pinout, SST39LF402C-55-4C-MAQE-T application, or SST39LF402C-55-4C-MAQE-T equivalent, this page delivers verified electrical specs, JEDEC-compliant x16 interface behavior, TSOP-48 package mapping, and real-world flash replacement guidance for industrial firmware storage designs.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of cycle count-eliminating software de-rating. It supports JEDEC-standard command sets including Software Data Protection (SDP), CFI query, and Security ID programming.
It features dual status detection (DQ6 toggle bit + DQ7 data# polling), open-drain RY/BY# output with external pull-up, and hardware write protection via WP# for the top 8 KWord boot block (3E000H–3FFFFH), aligned with SST39LF402C's top-boot configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization), directly maps to 512 KB of 16-bit wide addressable space |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 20 MHz+ microcontroller systems without wait states |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic rails and eliminates need for separate VPP programming voltage |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over 10+ years in deployed industrial devices |
| Data Retention | >100 years - ensures long-term reliability for unattended infrastructure equipment and medical firmware |
| Active Current | 5 mA typical at 5 MHz - low dynamic power enables battery-backed or energy-constrained host systems |
| Standby Current | 3 µA typical - meets ultra-low-power requirements for always-on boot memory in sleep-mode systems |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm, standard pinout, die-up orientation). Pin functions conform to JEDEC-standard x16 flash interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; AMS = A17 for sector/block selection |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby when high, enabling multi-chip memory expansion |
| OE# | Output Enable | Active-low output gate; controls data bus drive without affecting internal state or power mode |
| WE# | Write Enable | Active-low control for all write operations (program/erase); latches address/data on edge transitions |
| WP# | Write Protect | Hardware lock for top 8 KWord boot block (3E000H–3FFFFH); grounded to prevent accidental erase/write |
| RST# | Reset Input | Hardware reset to Read mode; terminates in-progress operations and restores bus interface integrity |
| RY/BY# | Ready/Busy# | Open-drain status indicator; pulled high externally to signal completion of program/erase cycles |
| VDD | Power Supply | 3.0–3.6 V core supply; internally generates VPP for erase/program - no external high-voltage source needed |
| VSS | Ground | Primary reference for all I/O and core logic; two dedicated pins ensure stable return path |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access during active erase - critical for interrupt-driven firmware loaders and dual-bank update schemes |
| Uniform Sector Architecture | 2 KWord sectors enable fine-grained firmware partitioning (e.g., bootloader, config, app image) without wasted space |
| Flexible Block Erase | Seven 32 KWord + one 16 KWord + two 4 KWord + one 8 KWord blocks - optimizes erase time for partial firmware patches |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment - supports device authentication and license binding |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access - cuts average power in polling-based boot sequences |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical firmware in programmable logic controllers requiring field updates without hardware rework. IC Role / Device Role / Timing Role: Nonvolatile x16 boot memory with top-block hardware protection ensuring bootloader integrity during field firmware upgrades. Use Value: 55 ns access enables zero-wait-state startup; 100,000-cycle endurance supports >10 years of scheduled firmware revisions. |
Use Scenario: Holding FDA-approved boot code and calibration data in portable diagnostic instruments with strict data retention and tamper resistance requirements. IC Role / Device Role / Timing Role: Secure, long-life flash storage with factory-programmed Security ID for device identity binding and anti-cloning. Use Value: >100-year data retention guarantees calibration validity across product lifetime; WP#-protected top block prevents bootloader corruption. |
| Automotive Infotainment System BIOS | Network Router Configuration Storage |
Use Scenario: Hosting boot firmware and UI assets in automotive head units where temperature stability and vibration resilience are mandatory. IC Role / Device Role / Timing Role: JEDEC-compliant x16 flash with RY/BY# status signaling for robust host-controller handshaking in harsh ECU environments. Use Value: 3.0–3.6 V operation matches automotive 3.3 V rail; 3 µA standby current minimizes battery drain during vehicle ignition-off periods. |
Use Scenario: Storing routing tables, security certificates, and failover configurations in carrier-grade routers requiring rapid, atomic firmware commits. IC Role / Device Role / Timing Role: High-reliability flash with sector-erase capability enabling sub-second configuration rollback without full chip erase. Use Value: 18 ms sector-erase time allows <100 ms config recovery; toggle-bit status detection simplifies interrupt-driven commit logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4C-MAQE-T | Slower 70 ns read access; wider 2.7–3.6 V supply range; identical pinout and command set | Better suited for legacy 2.7 V systems or cost-sensitive designs where speed is secondary | Select only if system timing budget permits 70 ns access or 2.7 V operation is required |
| MX29LV400CTTI-70G | 70 ns access; 3.0–3.6 V; 48-pin TSOP; supports CFI but lacks Security ID and Erase-Suspend | Lacks suspend/resume and secure ID - unsuitable for authenticated firmware or real-time update scenarios | Use only for basic firmware storage where advanced features are unnecessary and lower cost is prioritized |
Compared with SST39VF402C-70-4C-MAQE-T, the SST39LF402C-55-4C-MAQE-T delivers 25% faster read performance and tighter voltage tolerance, while MX29LV400CTTI-70G trades away Security ID and Erase-Suspend for broader market availability - making SST39LF402C-55-4C-MAQE-T optimal for time-critical, secure embedded boot applications.
Availability
SST39LF402C-55-4C-MAQE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive infotainment BIOS, and network router configuration storage requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF402C-55-4C-MAQE-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 semiconductor company specializing in microcontrollers, analog components, and nonvolatile memory solutions for embedded and industrial markets.
SST39LF402C-55-4C-MAQE-T belongs to Microchip's SuperFlash® Multi-Purpose Flash Plus family, engineered for reliable, low-power firmware and configuration storage in resource-constrained embedded systems requiring fast read, robust data integrity, and long-term field upgradability.
FAQ
What is the exact memory organization of SST39LF402C-55-4C-MAQE-T?
The SST39LF402C-55-4C-MAQE-T is organized as 256K × 16, delivering 4 Mbit (512 KB) of 16-bit-wide addressable memory space. Its address range spans 00000H to 3FFFFH, with the top 8 KWord (3E000H–3FFFFH) designated as hardware-protected boot block - a key differentiator from bottom-boot variants like SST39LF401C.
Does SST39LF402C-55-4C-MAQE-T require an external VPP voltage for programming?
No, SST39LF402C-55-4C-MAQE-T does not require an external VPP voltage. It uses internal charge-pump circuitry to generate the high voltage needed for erase and program operations from the single 3.0–3.6 V VDD supply - simplifying board design and eliminating external high-voltage components.
How is hardware write protection implemented on SST39LF402C-55-4C-MAQE-T?
Hardware write protection on SST39LF402C-55-4C-MAQE-T is enabled by grounding the WP# pin, which locks the top 8 KWord boot block (3E000H–3FFFFH) against program and erase commands. If WP# is left floating, an internal pull-up holds it high, disabling protection - ensuring safe default behavior during initialization.
What status detection methods does SST39LF402C-55-4C-MAQE-T support during write operations?
SST39LF402C-55-4C-MAQE-T supports three concurrent status detection methods: DQ6 toggle bit (alternating 1/0 during operation), DQ7 data# polling (complement-to-data during program, 0 during erase), and open-drain RY/BY# output (low during active program/erase). All are valid after defined WE# edge transitions per operation type.
Is SST39LF402C-55-4C-MAQE-T compatible with JEDEC-standard flash command sets?
Yes, SST39LF402C-55-4C-MAQE-T fully complies with JEDEC Standard JESD21-C for x16 flash pinouts and command sets. It supports industry-standard Software Data Protection (SDP), CFI query, Product ID read, and Security ID programming - ensuring interoperability with generic flash drivers and programming tools.
SST39LF402C-55-4C-MAQE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- Packaging:
- Tape & Reel (TR)
- 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:
- 10µs
- Access Time:
- 55 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WFBGA (6x4)
SST39LF402C-55-4C-MAQE-T FAQ
1.How can I place an order for SST39LF402C-55-4C-MAQE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF402C-55-4C-MAQE-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 SST39LF402C-55-4C-MAQE-T reliable?
The price and inventory of SST39LF402C-55-4C-MAQE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF402C-55-4C-MAQE-T is usually 5 days.
3.What payment methods are accepted for SST39LF402C-55-4C-MAQE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF402C-55-4C-MAQE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF402C-55-4C-MAQE-T?
SST39LF402C-55-4C-MAQE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF402C-55-4C-MAQE-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 SST39LF402C-55-4C-MAQE-T?
For technical support, including SST39LF402C-55-4C-MAQE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF402C-55-4C-MAQE-T requirements.
6.How does Aetrix verify that SST39LF402C-55-4C-MAQE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF402C-55-4C-MAQE-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 SST39LF402C-55-4C-MAQE-T meets industry standards.
7.What is the process for return or replacement of SST39LF402C-55-4C-MAQE-T?
All SST39LF402C-55-4C-MAQE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF402C-55-4C-MAQE-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 SST39LF402C-55-4C-MAQE-T part is unused and in its original packaging.
Return procedure for SST39LF402C-55-4C-MAQE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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