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Microchip Technology SST39LF401C-55-4C-B3KE-T
- Part No.:
- SST39LF401C-55-4C-B3KE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39LF401C-55-4C-B3KE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,099
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Product details
Overview
SST39LF401C-55-4C-B3KE-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 communication modules. It operates at 3.0–3.6 V, delivers 55 ns read access time, supports sector/block/chip erase, and includes hardware write protection via WP# pin.
For engineers reviewing the SST39LF401C-55-4C-B3KE-T datasheet, SST39LF401C-55-4C-B3KE-T pinout, SST39LF401C-55-4C-B3KE-T application, or SST39LF401C-55-4C-B3KE-T equivalent, this page provides verified package mapping (48-ball WFBGA), JEDEC-compliant x16 interface timing, boot-block architecture (bottom 8 KWord protected), and confirmed status detection methods (DQ6 toggle, DQ7 polling, RY/BY#).
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. It uses standard microprocessor bus control (CE#, OE#, WE#) and latched address/data paths for compatibility with legacy 16-bit memory interfaces.
It supports three software-controlled erase modes (sector, block, chip), erase-suspend/resume for real-time data access during background erase, and CFI query mode for automatic system identification. Hardware reset (RST#) forces immediate return to read mode, and Auto Low Power mode reduces 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 interface |
| Read Access Time | 55 ns (max); enables direct replacement in 55 ns–70 ns legacy flash sockets without timing margin loss |
| Supply Voltage | 3.0–3.6 V only; not compatible with 2.7 V operation like SST39VF variants |
| Endurance | 100,000 program/erase cycles (typical); sufficient for field-upgradable firmware with infrequent updates |
| Data Retention | >100 years; validated for long-life industrial deployments without refresh |
| Erase Architecture | Uniform 2 KWord sectors + flexible blocks (seven 32 KWord, one 16 KWord, two 4 KWord, one 8 KWord); bottom boot block (00000H–01FFFH) hardware-protected when WP# = low |
| Status Detection | Three concurrent methods: RY/BY# open-drain output, DQ7 data# polling, DQ6 toggle bit - ensures robust host-side write completion verification |
Pinout & Package
Package: 48-ball WFBGA (4 mm × 6 mm, 0.5 mm pitch), ball grid layout per Figure 4 and Table 1 of DS20005053B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17; A11–A17 select sector during Sector-Erase; A15–A17 select block during Block-Erase |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; tri-stated when CE# or OE# high; latched internally during write |
| CE# | Chip Enable | Active-low chip select; must be low to enable read/write operations; latches address/data on falling edge |
| OE# | Output Enable | Active-low output gate; controls data bus drivers; high impedance when high or CE# high |
| WE# | Write Enable | Active-low write control; latches data on rising edge; initiates internal program/erase after final pulse |
| WP# | Write Protect | Active-low hardware lock for bottom 8 KWord boot block (00000H–01FFFH); floating = internally pulled high = unprotected |
| RST# | Reset | Active-low hardware reset; terminates ongoing program/erase and returns device to Read mode within TRP |
| RY/BY# | Ready/Busy# | Open-drain status output; requires external 10 kΩ–100 kΩ pull-up; low = operation in progress, high = ready |
| VDD | Power Supply | 3.0–3.6 V supply; powers all internal logic and SuperFlash® programming circuitry |
| VSS | Ground | Reference ground for all I/O and core logic; two dedicated VSS balls in WFBGA package |
| NC | No Connection | Unbonded balls (e.g., A2, B1, C1, D1, E1, F1, G1, H1, J1, K1, L1, A6, B6, C6, D6, E6, F6, G6, H6, J6, K6, L6); must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 7 µs program and 18 ms erase times across full lifecycle - eliminates software de-rating |
| Bottom Boot Block Protection | Hardware-enforced protection of lowest 8 KWord (00000H–01FFFH) via WP# pin - prevents accidental overwrite of bootloader code |
| Erase-Suspend/Resume | Pause active sector/block erase to read any non-suspended location or program into unlocked sectors - critical for real-time systems |
| Security ID Space | Factory-programmed 128-bit ID + 128-word user-programmable space, locked permanently after programming - supports device authentication and traceability |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA automatically after valid access - cuts power in intermittently polled firmware storage |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to 16-bit CPU address space; accessed via standard memory read/write cycles with CE#/OE#/WE# handshaking. Use Value: 55 ns access time meets tight scan-cycle timing budgets; bottom boot block protection ensures bootloader integrity during field firmware upgrades. |
Use Scenario: Holding RF calibration tables and protocol stack configuration parameters in 4G/LTE baseband processors requiring frequent parameter updates during manufacturing test and field calibration. IC Role / Device Role / Timing Role: Configuration memory with sector-erase granularity; used alongside DMA controllers for burst loading of calibration data into DSP memory. Use Value: 18 ms uniform sector-erase enables deterministic update latency; CFI query mode allows automatic identification of flash density and command set during system boot. |
| Medical Imaging System Bootloader | Automotive Infotainment Head Unit |
Use Scenario: Secure storage of certified bootloader code in FDA-regulated diagnostic imaging equipment where firmware rollback and tampering must be physically prevented. IC Role / Device Role / Timing Role: Trusted boot memory with hardware write protection; Security ID space stores cryptographic keys and device serial binding. Use Value: WP#-enabled bottom boot block protection prevents unauthorized modification; >100-year data retention satisfies medical device lifetime requirements. |
Use Scenario: Storing UI assets, map data partitions, and OTA update staging area in automotive head units operating across -40°C to +105°C temperature range. IC Role / Device Role / Timing Role: Dual-purpose memory supporting both fast read (55 ns) for UI rendering and reliable erase/program for secure over-the-air updates. Use Value: Erase-suspend capability allows simultaneous UI display and background firmware validation; RY/BY# pin enables precise timing coordination with MCU interrupt handlers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF401C-70-4C-B3KE-T | Wider voltage range (2.7–3.6 V), slower 70 ns access time, same 256K×16 organization and WFBGA-48 package | Compatible with 2.7 V systems (e.g., battery-backed designs); unsuitable where 55 ns timing is required | Select only if system VDD can drop below 3.0 V or if timing margin allows 70 ns access |
| MX29LV400CBTI-70G | 4 Mbit (256K×16), 70 ns access, 2.7–3.6 V, TSOP-48 package; lacks erase-suspend and Security ID features | Lower-cost alternative for non-critical firmware storage; no hardware boot-block protection or suspend capability | Use where cost outweighs advanced reliability features and board space permits TSOP instead of WFBGA |
Compared with SST39VF401C-70-4C-B3KE-T, the SST39LF401C-55-4C-B3KE-T offers faster timing and tighter voltage compliance but sacrifices 2.7 V operation; versus MX29LV400CBTI-70G, it provides superior endurance management and security features at higher unit cost and smaller footprint.
Availability
SST39LF401C-55-4C-B3KE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, medical imaging bootloader, and automotive infotainment head unit applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF401C-55-4C-B3KE-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 Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with broad industrial and automotive qualification coverage.
The SST39LF401C-55-4C-B3KE-T belongs to Microchip's Multi-Purpose Flash Plus (MPF+) product line, engineered for high-reliability embedded firmware and configuration storage in space-constrained, thermally demanding applications.
FAQ
What is the exact memory organization and bus width of the SST39LF401C-55-4C-B3KE-T?
The SST39LF401C-55-4C-B3KE-T is organized as 256K × 16, delivering 4 Mbit total capacity across a 16-bit parallel data bus (DQ0–DQ15). It uses 18 address lines (A0–A17) and conforms to JEDEC-standard x16 flash pinouts and command sets, ensuring drop-in compatibility with legacy 16-bit memory interfaces.
Does the SST39LF401C-55-4C-B3KE-T support 2.7 V operation like some other SST39x devices?
No, the SST39LF401C-55-4C-B3KE-T is rated for 3.0–3.6 V only. Unlike the SST39VF401C variant (2.7–3.6 V), this part does not guarantee functionality below 3.0 V. Attempting operation at 2.7 V may result in failed program/erase cycles or read corruption, as confirmed by voltage specifications in DS20005053B Section 1.
How is hardware write protection implemented on the SST39LF401C-55-4C-B3KE-T?
The SST39LF401C-55-4C-B3KE-T implements bottom boot block protection: when WP# is driven low, the lowest 8 KWord (00000H–01FFFH) is locked against program and erase. If WP# is left floating, an internal pull-up holds it high, disabling protection. This matches the SST39LF401C designation (vs. SST39LF402C, which protects the top block).
What package type is used for the SST39LF401C-55-4C-B3KE-T, and is it RoHS compliant?
The SST39LF401C-55-4C-B3KE-T uses a 48-ball WFBGA package (4 mm × 6 mm, 0.5 mm pitch), as specified in DS20005053B Figure 4 and ordering code suffix "B3KE". All variants in the SST39LF401C/SST39LF402C family are RoHS compliant, with lead-free solderability and halogen-free materials per Microchip's environmental policy.
Can the SST39LF401C-55-4C-B3KE-T be used with standard microprocessor bus timing without additional glue logic?
Yes, the SST39LF401C-55-4C-B3KE-T uses standard CE#, OE#, and WE# control signals compatible with generic 16-bit microprocessor buses. Its latched address/data architecture, JEDEC-compliant timing (e.g., tAVQV = 55 ns), and built-in write timing generation eliminate need for external wait-state generators or timing adapters in most embedded designs.
SST39LF401C-55-4C-B3KE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- 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-TFBGA (6x8)
SST39LF401C-55-4C-B3KE-T FAQ
1.How can I place an order for SST39LF401C-55-4C-B3KE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF401C-55-4C-B3KE-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 SST39LF401C-55-4C-B3KE-T reliable?
The price and inventory of SST39LF401C-55-4C-B3KE-T 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-B3KE-T is usually 5 days.
3.What payment methods are accepted for SST39LF401C-55-4C-B3KE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF401C-55-4C-B3KE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF401C-55-4C-B3KE-T?
SST39LF401C-55-4C-B3KE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF401C-55-4C-B3KE-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 SST39LF401C-55-4C-B3KE-T?
For technical support, including SST39LF401C-55-4C-B3KE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF401C-55-4C-B3KE-T requirements.
6.How does Aetrix verify that SST39LF401C-55-4C-B3KE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF401C-55-4C-B3KE-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 SST39LF401C-55-4C-B3KE-T meets industry standards.
7.What is the process for return or replacement of SST39LF401C-55-4C-B3KE-T?
All SST39LF401C-55-4C-B3KE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF401C-55-4C-B3KE-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 SST39LF401C-55-4C-B3KE-T part is unused and in its original packaging.
Return procedure for SST39LF401C-55-4C-B3KE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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