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Microchip Technology SST39LF401C-55-4C-MAQE
- Part No.:
- SST39LF401C-55-4C-MAQE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39LF401C-55-4C-MAQE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,601
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Product details
Overview
SST39LF401C-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 microcontroller-based systems. It operates at 3.0–3.6 V, delivers 55 ns read access time, supports sector/block/chip erase, and integrates hardware block protection for the bottom 8 KWord boot block.
For engineers reviewing the SST39LF401C-55-4C-MAQE datasheet, SST39LF401C-55-4C-MAQE pinout, SST39LF401C-55-4C-MAQE application, or SST39LF401C-55-4C-MAQE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, SuperFlash® endurance and retention specs, and validated alternative flash parts for industrial firmware upgrades.
Technical Context
The SST39LF401C-55-4C-MAQE 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. It uses standard JEDEC x16 parallel interface timing with CE#, OE#, and WE# control signals and supports Auto Low Power mode reducing active read current to 3 µA after valid access.
It features hardware write protection via WP# for the bottom 8 KWord boot block (00000H–01FFFH), RY/BY# open-drain status output, and dual software detection methods-Data# Polling (DQ7) and Toggle Bits (DQ6/DQ2)-for program/erase completion. Security-ID includes factory-programmed 128-bit ID and 128-word user-programmable space.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), directly replaces legacy 256K×16 NOR flash in firmware storage |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 5 MHz–20 MHz microcontroller bus systems |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic rails without level shifting |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years |
| Data Retention | >100 years - ensures long-term reliability in unpowered industrial deployments |
| Active Current | 5 mA typical at 5 MHz - low power consumption during code fetch in battery-backed systems |
| Standby Current | 3 µA typical - meets ultra-low-power requirements for always-on embedded controllers |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm), RoHS-compliant, fine-pitch surface-mount package optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K×16 addressing; AMS = A17 for sector/block selection |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus with internal latching; tri-state when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby when high, enabling multi-chip memory decoding |
| OE# | Output Enable | Active-low output gate; controls data bus drive without affecting internal state |
| WE# | Write Enable | Active-low control for program/erase command latching; synchronizes with CE# for JEDEC timing compliance |
| WP# | Write Protect | Hardware lock for bottom 8 KWord boot block (00000H–01FFFH); grounded to prevent accidental erase/write |
| RST# | Reset | Hardware reset to Read mode; terminates in-progress operations and restores bus interface stability |
| RY/BY# | Ready/Busy# | Open-drain status indicator; pulled high externally to signal readiness for next operation |
| VDD | Power Supply | 3.0–3.6 V supply; internal charge pump generates VPP for erase/program - no external high-voltage source needed |
| VSS | Ground | System ground reference; two dedicated VSS pins ensure stable return path for I/O and core logic |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector enables fixed 7 µs program and 18 ms erase times across full lifecycle |
| Boot Block Protection | Hardware-protected bottom 8 KWord (00000H–01FFFH) prevents corruption of bootloader code during firmware updates |
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during erase, enabling background firmware validation |
| Security-ID Space | Factory-programmed 128-bit ID + 128-word user space, locked after programming to prevent tampering |
| CFI Support | JEDEC Common Flash Interface compliant - enables automatic detection and parameter negotiation in BIOS/bootloader |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile parallel NOR flash providing XIP-capable code storage with deterministic 55 ns read latency. Use Value: Bottom boot block protection ensures bootloader integrity during remote firmware patches; 100-year data retention eliminates recalibration drift concerns. |
Use Scenario: Holding calibrated sensor offsets and regulatory-compliant device configuration profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, field-upgradable configuration store with hardware write protection and CFI auto-detection for plug-and-play calibration modules. Use Value: Security-ID enables traceable device identity binding; 3 µA standby current extends battery life in handheld ultrasound units. |
| Automotive Infotainment Bootloader | Network Router Boot Image Storage |
Use Scenario: Hosting primary bootloader code in automotive head units requiring AEC-Q100-aligned reliability and fast cold-boot response. IC Role / Device Role / Timing Role: JEDEC-standard x16 flash interfacing directly with ARM Cortex-A MCU bus, delivering sub-60 ns instruction fetch. Use Value: 100,000-cycle endurance supports over-the-air (OTA) update cycles across 15-year vehicle lifespan; RY/BY# simplifies interrupt-driven update sequencing. |
Use Scenario: Storing immutable boot images and fail-safe recovery firmware in enterprise-grade Ethernet switches with dual-image redundancy. IC Role / Device Role / Timing Role: Parallel NOR flash acting as primary boot source for MIPS-based network processors, accessed via synchronous bus controller. Use Value: Sector-erase capability enables atomic image swaps; Auto Low Power mode reduces thermal load in fanless 1U chassis designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF401C-70-4C-MAQE | Wider voltage range (2.7–3.6 V); slower 70 ns read access; same 256K×16 density and boot-block layout | Preferred for mixed-voltage 2.7 V–3.6 V systems where 55 ns timing is not required | Select when board-level VDD tolerance exceeds ±0.3 V or when cost sensitivity outweighs speed requirement |
| MX29LV400CTTI-70G | 4 Mbit (256K×16), 70 ns access, 2.7–3.6 V, top-boot configuration (not bottom-boot), different command set and CFI structure | Requires firmware rework for boot block address mapping and erase command sequences | Use only if existing design already uses Macronix-compatible toolchain and top-boot layout is acceptable |
Compared with SST39VF401C-70-4C-MAQE, the SST39LF401C-55-4C-MAQE delivers faster boot timing and tighter voltage control but requires stable 3.0–3.6 V rails; versus MX29LV400CTTI-70G, it offers identical pinout and JEDEC command compatibility but differs in boot-block orientation and security-ID implementation.
Availability
SST39LF401C-55-4C-MAQE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment bootloader applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SST39LF401C-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 2016 to expand its serial and parallel flash portfolio.
The SST39LF401C belongs to Microchip's Multi-Purpose Flash Plus (MPF+) product line, engineered for reliable, low-power firmware and configuration storage in industrial, automotive, and medical embedded systems where deterministic timing and long-term data integrity are critical.
FAQ
What is the boot block configuration of the SST39LF401C-55-4C-MAQE?
The SST39LF401C-55-4C-MAQE implements bottom boot block protection, covering address range 00000H–01FFFH (8 KWords). This is hardwired per device variant and confirmed in Table 4 of the datasheet. WP# must be held low to activate hardware protection of this region. The SST39LF401C-55-4C-MAQE does not support top-boot configuration - that is reserved for SST39LF402C variants.
Does the SST39LF401C-55-4C-MAQE require an external VPP voltage for programming?
No, the SST39LF401C-55-4C-MAQE 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. This eliminates the need for additional power rails or high-voltage regulators in the system design.
How is write operation completion detected on the SST39LF401C-55-4C-MAQE?
The SST39LF401C-55-4C-MAQE supports three concurrent methods: Ready/Busy# (RY/BY#) open-drain output, Data# Polling on DQ7, and Toggle Bit detection on DQ6 (and DQ2 for erase-suspend context). All are valid after the rising edge of the final WE# pulse in the command sequence. RY/BY# requires an external 10–100 kΩ pull-up resistor to function correctly.
Is the SST39LF401C-55-4C-MAQE pin-compatible with SST39VF401C variants?
Yes, the SST39LF401C-55-4C-MAQE is pin-compatible with SST39VF401C-70-4C-MAQE and other members of the SST39x401C family in the same WFBGA package (MAQE suffix). Address, data, and control pin assignments match exactly per Figure 4 and Table 1. Voltage and timing differences do not affect physical or logical pin mapping.
What security features does the SST39LF401C-55-4C-MAQE provide beyond hardware write protection?
In addition to WP#-based boot block protection, the SST39LF401C-55-4C-MAQE includes a 128-bit factory-programmed Security-ID and 128-word user-programmable ID space. The user segment can be permanently locked using the User Security ID Program Lock-Out command (85H), preventing further writes. Neither segment supports erase - ensuring persistent identity binding across device lifetime.
SST39LF401C-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)
SST39LF401C-55-4C-MAQE FAQ
1.How can I place an order for SST39LF401C-55-4C-MAQE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF401C-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 SST39LF401C-55-4C-MAQE reliable?
The price and inventory of SST39LF401C-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 SST39LF401C-55-4C-MAQE is usually 5 days.
3.What payment methods are accepted for SST39LF401C-55-4C-MAQE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF401C-55-4C-MAQE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF401C-55-4C-MAQE?
SST39LF401C-55-4C-MAQE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF401C-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 SST39LF401C-55-4C-MAQE?
For technical support, including SST39LF401C-55-4C-MAQE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF401C-55-4C-MAQE requirements.
6.How does Aetrix verify that SST39LF401C-55-4C-MAQE is sourced from the original manufacturer or authorized distributors?
All SST39LF401C-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 SST39LF401C-55-4C-MAQE meets industry standards.
7.What is the process for return or replacement of SST39LF401C-55-4C-MAQE?
All SST39LF401C-55-4C-MAQE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF401C-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 SST39LF401C-55-4C-MAQE part is unused and in its original packaging.
Return procedure for SST39LF401C-55-4C-MAQE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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