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Microchip Technology SST39LF402C-55-4C-MAQE
- Part No.:
- SST39LF402C-55-4C-MAQE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39LF402C-55-4C-MAQE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,297
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Product details
Overview
SST39LF402C-55-4C-MAQE from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC with SuperFlash® technology, designed for embedded firmware and configuration storage in industrial controllers and communication modules. It operates at 3.0–3.6 V, delivers 55 ns read access time, supports hardware block protection on the top 8 KWord boot sector, and features erase-suspend/resume capability for real-time system responsiveness.
For engineers reviewing the SST39LF402C-55-4C-MAQE datasheet, SST39LF402C-55-4C-MAQE pinout, SST39LF402C-55-4C-MAQE application, or SST39LF402C-55-4C-MAQE equivalent, key selection considerations include its 48-ball WFBGA (4 mm × 6 mm) package, JEDEC-standard x16 parallel interface, top-boot architecture, and support for software data protection via six-byte command sequences.
Technical Context
This device implements a split-gate SuperFlash® cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count-unlike conventional flash technologies where timing degrades over endurance life. Its command set complies fully with JEDEC standard pinouts and protocols for x16 memories, including CFI Query mode entry and Software ID identification.
The SST39LF402C-55-4C-MAQE integrates dual status detection (DQ6 toggle bit and DQ7 data# polling), an open-drain RY/BY# output requiring external 10 kΩ–100 kΩ pull-up, and hardware write protection via WP# tied to the top boot block (3E000H–3FFFFH). It supports Auto Low Power mode, reducing active read current from 5 mA to 3 µA after valid access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization); supports 16-bit parallel data bus for high-throughput firmware loading. |
| Read Access Time | 55 ns typical; enables direct execution from flash (XIP) in microcontroller-based systems without wait states at moderate clock speeds. |
| Supply Voltage | 3.0–3.6 V; compatible with 3.3 V logic domains and eliminates need for separate VPP programming voltage. |
| Endurance | 100,000 program/erase cycles typical; sufficient for field firmware updates across product lifecycle in industrial equipment. |
| Data Retention | Greater than 100 years; ensures long-term reliability of stored boot code and calibration data without refresh. |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32 KWord, one 16 KWord, two 4 KWord, one 8 KWord); allows granular update of application code while preserving bootloader. |
| Write Protection | Hardware top-block protection (3E000H–3FFFFH) via WP# pin; prevents accidental overwrite of critical boot firmware during field upgrades. |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm), RoHS-compliant, bottom-side ball layout per Figure 4 in DS20005053B.
| 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 during erase commands. |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; outputs latched during read, inputs latched during write; tri-state when CE# or OE# high. |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high; required low for all write/erase operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive; must be low with CE# low to enable read data output. |
| WE# | Write Enable | Active-low control for write cycles; latches address/data on falling/rising edges per JEDEC timing; initiates internal program/erase. |
| WP# | Write Protect | Active-low hardware lock for top 8 KWord boot block (3E000H–3FFFFH); floating = internally pulled high = unprotected. |
| RST# | Reset | Active-low hardware reset; terminates ongoing program/erase and forces return to read mode within TRP (min 100 ns). |
| RY/BY# | Ready/Busy# | Open-drain status indicator; low = active program/erase; requires external pull-up; supports multi-device status monitoring. |
| VDD / VSS | Power / Ground | Single 3.0–3.6 V supply; no VPP pin required-internal charge pump generates programming voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read/program from non-suspended sectors during active erase-critical for interrupt-driven embedded systems. |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space; supports secure device authentication and traceability. |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA automatically after valid access-lowers average power in polling-based firmware loaders. |
| JEDEC CFI Support | Enables runtime detection of device parameters (voltage, timing, block map) via standardized query mode-simplifies BSP portability. |
| Toggle Bit & Data# Polling | Dual software status detection (DQ6 toggle + DQ7 polling) provides robust end-of-write verification without dedicated status pins. |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing XIP-capable boot code and application image with hardware-protected top-boot region. Use Value: 55 ns read access enables deterministic boot timing; 100,000-cycle endurance supports remote firmware patches over 10+ years. | Use Scenario: Holding FPGA configuration bitstreams and RF calibration tables in 4G/LTE base station radios. IC Role / Device Role / Timing Role: Parallel-interface configuration memory with sector-erase granularity for selective reconfiguration without full reload. Use Value: Erase-suspend allows real-time radio operation during partial bitstream updates; top-boot protection secures critical initialization routines. |
| Medical Diagnostic Device Bootloader | Automotive Infotainment System BIOS |
Use Scenario: Hosting certified bootloader and safety-critical startup routines in FDA-regulated imaging equipment. IC Role / Device Role / Timing Role: Secure, high-reliability boot memory with locked Security ID and hardware write protection on boot sector. Use Value: >100-year data retention guarantees integrity of regulatory-certified code; CFI support simplifies bootloader validation across production batches. | Use Scenario: Storing UEFI-compatible BIOS and vehicle-specific configuration in automotive head units with OTA update capability. IC Role / Device Role / Timing Role: Dual-boot flash memory supporting A/B partitioning via top/bottom block architecture and software data protection. Use Value: Block-erase flexibility enables atomic firmware swaps; WP#-enabled top-block protection prevents corruption during power-loss during OTA. |
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 | Slower 70 ns read access; wider 2.7–3.6 V supply range; same 48-ball WFBGA package and pinout. | Lower-performance industrial control where 55 ns timing is not required; broader voltage margin for brown-out resilience. | Select when system clock constraints allow longer access time and wider supply tolerance is needed over speed. |
| MX29LV400CTTI-70G | 4 Mbit x16 CFI-compliant flash; 70 ns access; 3.0–3.6 V; 48-TSOP package-not pin-compatible with WFBGA. | Legacy board designs using TSOP footprint; no WFBGA option available; lacks erase-suspend feature. | Choose only for TSOP-based legacy redesigns; verify PCB layout change and firmware timing adaptation due to missing suspend/resume. |
Compared with SST39VF402C-70-4C-MAQE, the SST39LF402C-55-4C-MAQE delivers faster boot and code execution but narrower voltage range; versus MX29LV400CTTI-70G, it offers superior real-time update capability via erase-suspend and modern WFBGA packaging for space-constrained designs.
Availability
SST39LF402C-55-4C-MAQE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, and medical diagnostic device bootloader applications requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF402C-55-4C-MAQE 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39LF402C-55-4C-MAQE belongs to the Multi-Purpose Flash Plus (MPF+) product line, engineered specifically for embedded systems demanding high reliability, low-power operation, and real-time firmware update capability in space- and power-constrained environments.
FAQ
What is the exact memory organization of the SST39LF402C-55-4C-MAQE?
The SST39LF402C-55-4C-MAQE is organized as 256K × 16, delivering 4 Mbit total capacity with a 16-bit parallel data bus (DQ0–DQ15). Its address space spans 00000H to 3FFFFH, and it implements top-boot architecture with hardware protection on the upper 8 KWord block (3E000H–3FFFFH). This structure supports efficient firmware partitioning and JEDEC-standard x16 memory interfacing.
Does the SST39LF402C-55-4C-MAQE require an external VPP voltage for programming?
No, the SST39LF402C-55-4C-MAQE does not require an external VPP voltage. It uses internal charge pump circuitry to generate the necessary high voltage for erase and program operations from the single 3.0–3.6 V VDD supply. This eliminates the need for additional power rails or voltage translators, simplifying system design and reducing BOM cost compared to older flash architectures.
How does hardware write protection work on the SST39LF402C-55-4C-MAQE?
Hardware write protection on the SST39LF402C-55-4C-MAQE is implemented via the WP# pin, which protects the top 8 KWord boot block (3E000H–3FFFFH) when driven low. If WP# is left floating, an internal pull-up holds it high, disabling protection. This mechanism prevents accidental erasure or programming of critical boot code during power transitions or firmware updates-ensuring system-level reliability without software overhead.
What status detection methods does the SST39LF402C-55-4C-MAQE support during write operations?
The SST39LF402C-55-4C-MAQE supports three concurrent status detection methods: (1) RY/BY# open-drain output (requires external pull-up), (2) DQ6 toggle bit, and (3) DQ7 data# polling. These provide redundant, software-accessible confirmation of program/erase completion. DQ2 serves as an auxiliary toggle bit for erase-suspend diagnostics. All methods are valid after defined WE# edge timings per the datasheet, enabling robust host-side timing control.
Is the SST39LF402C-55-4C-MAQE compatible with JEDEC-standard flash command sets?
Yes, the SST39LF402C-55-4C-MAQE fully conforms to JEDEC standard pinouts and command sets for x16 flash memories. It supports Common Flash Interface (CFI) Query mode, Software Product Identification, and industry-standard command sequences-including six-byte sector/block/chip erase and three-byte word-program initiation. This ensures interoperability with existing flash controllers, bootloaders, and programming tools designed for JEDEC-compliant devices.
SST39LF402C-55-4C-MAQE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-WFBGA
- Packaging:
- Tray
- 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 FAQ
1.How can I place an order for SST39LF402C-55-4C-MAQE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF402C-55-4C-MAQE 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 reliable?
The price and inventory of SST39LF402C-55-4C-MAQE 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 is usually 5 days.
3.What payment methods are accepted for SST39LF402C-55-4C-MAQE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF402C-55-4C-MAQE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF402C-55-4C-MAQE?
SST39LF402C-55-4C-MAQE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF402C-55-4C-MAQE 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?
For technical support, including SST39LF402C-55-4C-MAQE 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 requirements.
6.How does Aetrix verify that SST39LF402C-55-4C-MAQE is sourced from the original manufacturer or authorized distributors?
All SST39LF402C-55-4C-MAQE 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 meets industry standards.
7.What is the process for return or replacement of SST39LF402C-55-4C-MAQE?
All SST39LF402C-55-4C-MAQE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF402C-55-4C-MAQE, 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 part is unused and in its original packaging.
Return procedure for SST39LF402C-55-4C-MAQE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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