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Microchip Technology SST39LF401C-55-4C-EKE-T
- Part No.:
- SST39LF401C-55-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39LF401C-55-4C-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
SST39LF401C-55-4C-EKE-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 features hardware write protection via WP# pin.
For engineers reviewing the SST39LF401C-55-4C-EKE-T datasheet, SST39LF401C-55-4C-EKE-T pinout, SST39LF401C-55-4C-EKE-T application, or SST39LF401C-55-4C-EKE-T equivalent, key selection criteria include boot-block architecture (bottom 8 KWord protected), JEDEC-standard x16 interface timing, RY/BY# status signaling, Auto Low Power mode (3 µA standby), and 100,000-cycle endurance for field-upgradable systems.
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-eliminating software de-rating over lifetime. It uses standard microprocessor bus control (CE#, OE#, WE#) and supports JEDEC-compliant command sets for sector/block/chip erase, word-program, and erase-suspend/resume.
The SST39LF401C-55-4C-EKE-T integrates hardware block protection for the bottom 8 KWord boot sector (00000H–01FFFH), RST# reset input for hardware recovery, and dual status detection (DQ7 Data# Polling and DQ6 Toggle Bit) plus open-drain RY/BY# output for real-time operation monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables direct 16-bit data bus interfacing without glue logic |
| Read Access Time | 55 ns (max); meets timing requirements for 12 MHz system buses with zero 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 (typical); supports frequent firmware updates in remote IoT gateways |
| Data Retention | >100 years; ensures long-term reliability in unattended industrial deployments |
| Standby Current | 3 µA (typical); enables ultra-low-power sleep modes in battery-backed controllers |
| Erase Time | Sector/Block: 18 ms (typ), Chip: 40 ms (typ); enables fast field reconfiguration without system downtime |
| Word-Program Time | 7 µs (typ); allows rapid patching of small code/data segments during runtime |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | Latched on falling edge of CE# or WE#; A17 is most significant address for full 256K-word addressing |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional bus; tri-stated when CE# or OE# is high; latched internally during writes |
| CE# | Chip Enable | Active-low chip select; device enters standby (3 µA) when high; required to initiate all operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive; must be low with CE# for valid read output |
| WE# | Write Enable | Active-low control for program/erase command latching; rising edge triggers internal operation start |
| WP# | Write Protect | Active-low hardware lock for bottom 8 KWord boot block (00000H–01FFFH); prevents accidental firmware overwrite |
| RST# | Reset Input | Active-low hardware abort; 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 |
| VDD | Power Supply | +3.0–3.6 V supply; powers all core and I/O circuitry; no VPP required |
| VSS | Ground | System reference ground; two dedicated pins ensure stable return path for high-speed switching |
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 |
| Boot Block Protection | Hardware-locked bottom 8 KWord (00000H–01FFFH) prevents corruption of bootloader during field updates |
| Erase-Suspend/Resume | Allows temporary halt of sector/block erase to read or program other regions-critical for real-time OS coexistence |
| Security ID | Factory-programmed 128-bit ID + 128-word user space; supports secure device authentication and firmware binding |
| Auto Low Power Mode | Automatically transitions from 5 mA active read to 3 µA standby after valid access-no software intervention needed |
| CFI Compliance | Integrated Common Flash Interface enables automatic driver detection and configuration in Linux/RTOS environments |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped directly to CPU address space; provides 55 ns read access for deterministic scan-cycle execution. Use Value: Bottom boot-block protection ensures bootloader integrity during over-the-air firmware patches, while 100,000-cycle endurance supports decades of scheduled upgrades. |
Use Scenario: Holding RF calibration tables and protocol stack parameters in 4G/LTE base station radio units operating in temperature-controlled cabinets. IC Role / Device Role / Timing Role: Configuration memory accessed during power-up and runtime recalibration; RY/BY# pin synchronizes host processor with erase/program completion. Use Value: 3 µA standby current minimizes thermal load in dense RF modules; sector-erase capability enables selective parameter updates without full flash reprogramming. |
| Medical Diagnostic Device Bootloader | Automotive Infotainment System BIOS |
|
Use Scenario: Securely storing certified bootloader code in FDA-regulated ultrasound and MRI control systems requiring traceable firmware revisions. IC Role / Device Role / Timing Role: Trusted boot memory with hardware write protection (WP#) and Security ID for cryptographic signature verification during boot sequence. Use Value: >100-year data retention guarantees compliance with medical device lifecycle mandates; CFI support simplifies UEFI-compatible firmware driver integration. |
Use Scenario: Hosting infotainment BIOS and HMI assets in automotive head units where vibration, temperature cycling, and ESD immunity are critical. IC Role / Device Role / Timing Role: Primary nonvolatile storage for boot firmware and UI assets; operates across -40°C to +85°C ambient with guaranteed 55 ns timing. Use Value: SuperFlash® fixed timing eliminates performance degradation over 15+ year vehicle service life; RST# pin enables safe recovery from brown-out events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CTTI-70G | 4 Mbit x16, 70 ns access, 2.7–3.6 V supply, no RST# pin, no Security ID | Lacks hardware reset and secure ID; suitable only for cost-sensitive consumer designs without safety certification | Select if board layout lacks RST# routing and security features are unnecessary |
| S29GL032N11TFI010 | 32 Mbit x16, 110 ns access, 2.7–3.6 V, includes ECC and sector protection lock bits | Higher density and built-in error correction but slower timing and larger footprint; targets telecom infrastructure | Choose only when migrating to larger firmware images and ECC is mandated by system architecture |
Compared with MX29LV400CTTI-70G and S29GL032N11TFI010, the SST39LF401C-55-4C-EKE-T uniquely balances 55 ns speed, bottom-boot protection, RST# recoverability, and Security ID in a 48-pin TSOP-making it optimal for safety-critical embedded updates where timing, integrity, and compactness are jointly constrained.
Availability
SST39LF401C-55-4C-EKE-T is available at Aetrix Electronics and suitable for industrial PLCs, telecom baseband units, medical diagnostic equipment, and automotive infotainment systems requiring stable component supply across extended product lifecycles.
Supply support for SST39LF401C-55-4C-EKE-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 emphasis on reliability and long-term product support.
The SST39LF401C-55-4C-EKE-T belongs to Microchip's Multi-Purpose Flash Plus family, engineered for embedded systems requiring robust, low-voltage, field-upgradable nonvolatile storage with deterministic timing and hardware-level data protection.
FAQ
What is the exact memory organization and density of the SST39LF401C-55-4C-EKE-T?
The SST39LF401C-55-4C-EKE-T is organized as 256K words × 16 bits, delivering a total capacity of 4 Mbit (512 KB). This x16 configuration interfaces directly with 16-bit data buses, eliminating the need for external data multiplexing or byte-lane alignment logic in microcontroller-based systems.
Does the SST39LF401C-55-4C-EKE-T support hardware write protection, and how is it implemented?
Yes, the SST39LF401C-55-4C-EKE-T implements hardware block protection via the WP# pin. When WP# is driven low, it permanently protects the bottom 8 KWord boot sector (address range 00000H–01FFFH) from program and erase operations-ensuring bootloader integrity during field firmware updates.
What are the supported erase granularities for the SST39LF401C-55-4C-EKE-T?
The SST39LF401C-55-4C-EKE-T supports three erase modes: sector-erase (uniform 2 KWord sectors), block-erase (flexible architecture with seven 32 KWord, one 16 KWord, two 4 KWord, and one 8 KWord blocks), and chip-erase (full 4 Mbit array). All erase operations are initiated via JEDEC-standard command sequences.
How does the SST39LF401C-55-4C-EKE-T indicate completion of program or erase operations?
The SST39LF401C-55-4C-EKE-T provides three concurrent status mechanisms: Data# Polling (DQ7 toggles until operation completes), Toggle Bit (DQ6 toggles during operation, stops when complete), and Ready/Busy# (RY/BY# open-drain output pulled low during active operations). All are valid after defined WE# edge timings per operation type.
Is the SST39LF401C-55-4C-EKE-T compatible with standard JEDEC flash memory interfaces?
Yes, the SST39LF401C-55-4C-EKE-T conforms fully to JEDEC standard pinouts and command sets for x16 flash memories. It supports common protocols including Software Data Protection, CFI Query mode, and Product Identification-enabling drop-in compatibility with existing flash memory drivers and BIOS implementations.
SST39LF401C-55-4C-EKE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- 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-TSOP
SST39LF401C-55-4C-EKE-T FAQ
1.How can I place an order for SST39LF401C-55-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF401C-55-4C-EKE-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-EKE-T reliable?
The price and inventory of SST39LF401C-55-4C-EKE-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-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39LF401C-55-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF401C-55-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF401C-55-4C-EKE-T?
SST39LF401C-55-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF401C-55-4C-EKE-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-EKE-T?
For technical support, including SST39LF401C-55-4C-EKE-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-EKE-T requirements.
6.How does Aetrix verify that SST39LF401C-55-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF401C-55-4C-EKE-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-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39LF401C-55-4C-EKE-T?
All SST39LF401C-55-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF401C-55-4C-EKE-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-EKE-T part is unused and in its original packaging.
Return procedure for SST39LF401C-55-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39LF401C-55-4C-EKE-T Tags
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