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Microchip Technology SST39VF401C-70-4C-MAQE-T
- Part No.:
- SST39VF401C-70-4C-MAQE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-WFBGA
- Datasheet:
-
SST39VF401C-70-4C-MAQE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48WFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,533
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Product details
Overview
SST39VF401C-70-4C-MAQE-T 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 legacy system upgrades. It operates from 2.7–3.6 V, delivers 70 ns read access time, supports hardware block protection on the bottom 8 KWord boot sector (00000H–01FFFH), and features erase-suspend/resume for real-time interruptible updates.
For engineers reviewing the SST39VF401C-70-4C-MAQE-T datasheet, SST39VF401C-70-4C-MAQE-T pinout, SST39VF401C-70-4C-MAQE-T application, or SST39VF401C-70-4C-MAQE-T equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, SuperFlash endurance (100,000 cycles), and validated alternatives for legacy flash replacement in space-constrained TSOP designs.
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 NOR flash. Its command set conforms to JEDEC standard x16 pinouts and uses six-byte sequences for sector/block/chip erase, with software data protection permanently enabled at shipment.
The SST39VF401C-70-4C-MAQE-T integrates hardware block protection via WP# for the bottom 8 KWord boot sector, RY/BY# open-drain status signaling, and dual status detection (DQ7 Data# Polling and DQ6 Toggle Bit) for write completion monitoring without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16), directly replaces 27C040 EPROMs and compatible with x16 bus interfaces. |
| Read Access Time | 70 ns maximum - enables direct connection to 14 MHz microcontrollers without wait states. |
| Supply Voltage | 2.7–3.6 V - supports single-supply operation in battery-backed or low-voltage industrial systems. |
| Endurance | 100,000 program/erase cycles - ensures reliable field firmware updates over product lifetime. |
| Data Retention | Greater than 100 years - suitable for unattended infrastructure equipment with long service intervals. |
| Boot Block Protection | Bottom 8 KWord (00000H–01FFFH) protected when WP# = low - prevents accidental overwrite of bootloader code. |
| Package | 48-lead TSOP (12 mm × 20 mm) - industry-standard footprint for drop-in replacement in legacy PCBs. |
Pinout & Package
48-lead TSOP (Thin Small Outline Package), 12 mm × 20 mm body, JEDEC standard x16 memory pinout. Pin 1 marked by notch or dot; top view, die-up orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17 selects top/bottom boot block during erase operations. |
| DQ0–DQ15 | Data I/O (x16) | Bi-directional 16-bit data bus; outputs latched during read, inputs latched during write; high-impedance 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 commands. |
| OE# | Output Enable | Active-low output gate; controls data bus drivers during read; must be low with CE# for valid read access. |
| 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 bottom 8 KWord boot sector (00000H–01FFFH); floating = internally pulled high = unprotected. |
| RST# | Hardware Reset | Active-low asynchronous reset; terminates ongoing erase/program and forces return to read mode within TRP. |
| RY/BY# | Ready/Busy# | Open-drain status output; pulled low during erase/program; requires external 10–100 kΩ pull-up to VDD. |
| VDD | Power Supply | 2.7–3.6 V supply; powers core logic and SuperFlash array; internal charge pump generates VPP for programming. |
| VSS | Ground | Reference ground for all signals and internal circuitry; two dedicated pins for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time interruption of sector/block erase to read or program other non-suspended sectors - critical for deterministic response in safety-critical firmware updates. |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid read access - cuts power in intermittently polled configuration memory. |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable segment - enables secure device authentication and traceability in OEM systems. |
| Uniform Sector Architecture | 2 KWord sectors (128 total) - simplifies firmware partitioning and enables fine-grained update granularity without wasted space. |
| Fixed Timing Performance | 7 µs word-program and 18 ms sector/block erase - timing remains constant across full lifecycle, eliminating software de-rating. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Bootloader |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile x16 memory holding executable code and runtime parameters; accessed via parallel bus during cold start and field upgrade. Use Value: Bottom boot block protection prevents corruption of bootloader during firmware download; 100-year retention ensures integrity across decades of unattended operation. |
Use Scenario: Replacing obsolete EPROMs in legacy medical devices requiring field-upgradable calibration tables and safety-critical boot code. IC Role / Device Role / Timing Role: Direct x16 bus-connected flash memory serving as primary boot ROM and configuration store. Use Value: 70 ns access time eliminates wait states on 14 MHz Z80/8051 derivatives; TSOP package allows retrofit into existing EPROM sockets. |
| Telecom Line Card Configuration | Automotive ECU Calibration Storage |
|
Use Scenario: Holding port mapping, protocol stack settings, and fault logs in carrier-grade DSLAM line cards subject to frequent reconfiguration. IC Role / Device Role / Timing Role: Parallel-interface flash used for persistent parameter storage with occasional in-service updates. Use Value: Erase-suspend capability enables immediate response to SNMP queries while background erase completes - no service interruption. |
Use Scenario: Storing engine calibration maps and emission control parameters in Tier-1 automotive ECUs requiring ASIL-B compliant nonvolatile storage. IC Role / Device Role / Timing Role: Boot-sector-protected flash storing immutable bootloader and field-updatable calibration data. Use Value: Hardware WP# lock on bottom boot block guarantees bootloader integrity; 100,000-cycle endurance supports repeated dealer-level recalibration. |
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 | Top-boot architecture (3E000H–3FFFFH protected), identical timing, voltage, and package. | Used where bootloader resides in top sector; not interchangeable without PCB address decoding changes. | Select only if top-boot protection matches system memory map; otherwise SST39VF401C-70-4C-MAQE-T is mandatory for bottom-boot layouts. |
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns, 3.0–3.6 V; top-boot only; lacks erase-suspend and auto low-power mode. | Compatible for basic read/write but cannot support real-time interruptible updates or ultra-low-power polling. | Choose only for cost-sensitive, non-interruptible applications; verify bootloader location and power budget compatibility before substitution. |
Compared with SST39VF401C-70-4C-MAQE-T, the SST39VF402C variant shifts hardware protection to the top sector - requiring address decode alignment - while MX29LV400CTTI-70G omits critical real-time features like erase-suspend and auto low-power, limiting suitability for responsive embedded update workflows.
Availability
SST39VF401C-70-4C-MAQE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system bootloader replacement, telecom line card configuration, and automotive ECU calibration storage requiring stable component supply and long-term obsolescence management.
Supply support for SST39VF401C-70-4C-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 acquired Silicon Storage Technology (SST) in 2016 and now manufactures and supports the SST39VF series as part of its broad flash memory portfolio.
The SST39VF401C-70-4C-MAQE-T belongs to the Multi-Purpose Flash Plus (MPF+) family, engineered specifically for reliable, low-voltage firmware and configuration storage in industrial, telecom, and automotive systems where legacy EPROM replacement and long-term data integrity are critical.
FAQ
What is the boot block configuration of SST39VF401C-70-4C-MAQE-T?
The SST39VF401C-70-4C-MAQE-T implements bottom-boot block protection, covering the lowest 8 KWord (32 KB) address range from 00000H to 01FFFH. This sector is hardware-locked against program/erase when WP# is driven low. The device does not support top-boot configuration - that functionality is exclusive to the SST39VF402C variant.
Does SST39VF401C-70-4C-MAQE-T require an external VPP voltage?
No, SST39VF401C-70-4C-MAQE-T does not require an external VPP voltage. It uses an internal charge pump to generate the high voltage needed for programming and erasing, operating solely from the 2.7–3.6 V VDD supply. This eliminates external high-voltage circuitry and simplifies board design compared to older EPROM or early flash devices.
How is write completion detected on SST39VF401C-70-4C-MAQE-T?
Write completion on SST39VF401C-70-4C-MAQE-T is detected using three complementary methods: Ready/Busy# (RY/BY#) open-drain output, Data# Polling (DQ7 toggles until operation completes), and Toggle Bit (DQ6 toggles during erase/program). All methods are valid after defined WE# edge timings - RY/BY# is preferred for hardware-driven systems, while DQ7/DQ6 suit software-polling implementations.
Can SST39VF401C-70-4C-MAQE-T be used as a direct replacement for 27C040 EPROMs?
Yes, SST39VF401C-70-4C-MAQE-T is a functional and pin-compatible replacement for 27C040 EPROMs in x16 bus systems. It matches the 48-pin TSOP footprint, 256K × 16 organization, and JEDEC-standard command interface. Unlike EPROMs, it requires no UV erasure and supports in-system electrical erase/program - but verify WP# handling and RY/BY# pull-up requirements during migration.
What is the purpose of the Security ID feature in SST39VF401C-70-4C-MAQE-T?
The Security ID feature in SST39VF401C-70-4C-MAQE-T provides a 128-bit factory-programmed identifier plus 128 words of user-programmable space. It enables secure device authentication, anti-cloning, and supply chain traceability. The user segment can be permanently locked after programming to prevent tampering, and neither segment is erasable - ensuring persistent identity binding across the device's lifetime.
SST39VF401C-70-4C-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:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WFBGA (6x4)
SST39VF401C-70-4C-MAQE-T FAQ
1.How can I place an order for SST39VF401C-70-4C-MAQE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39VF401C-70-4C-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 SST39VF401C-70-4C-MAQE-T reliable?
The price and inventory of SST39VF401C-70-4C-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 SST39VF401C-70-4C-MAQE-T is usually 5 days.
3.What payment methods are accepted for SST39VF401C-70-4C-MAQE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39VF401C-70-4C-MAQE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39VF401C-70-4C-MAQE-T?
SST39VF401C-70-4C-MAQE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39VF401C-70-4C-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 SST39VF401C-70-4C-MAQE-T?
For technical support, including SST39VF401C-70-4C-MAQE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39VF401C-70-4C-MAQE-T requirements.
6.How does Aetrix verify that SST39VF401C-70-4C-MAQE-T is sourced from the original manufacturer or authorized distributors?
All SST39VF401C-70-4C-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 SST39VF401C-70-4C-MAQE-T meets industry standards.
7.What is the process for return or replacement of SST39VF401C-70-4C-MAQE-T?
All SST39VF401C-70-4C-MAQE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39VF401C-70-4C-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 SST39VF401C-70-4C-MAQE-T part is unused and in its original packaging.
Return procedure for SST39VF401C-70-4C-MAQE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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