My Inquiry
My Account
Microchip Technology SST39LF401C-55-4C-EKE
- Part No.:
- SST39LF401C-55-4C-EKE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39LF401C-55-4C-EKE.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,786
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39LF401C-55-4C-EKE from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC designed for embedded program/data storage in microcontroller-based systems. It operates at 3.0–3.6 V, delivers 55 ns read access time, supports hardware block protection on the bottom 8 KWord boot sector, and features erase-suspend/resume capability for real-time firmware updates.
For engineers reviewing the SST39LF401C-55-4C-EKE datasheet, SST39LF401C-55-4C-EKE pinout, SST39LF401C-55-4C-EKE application, or SST39LF401C-55-4C-EKE equivalent, this page provides verified technical context, JEDEC-compliant x16 interface details, boot-block protection mapping, SuperFlash® endurance/reliability metrics, and validated alternative flash parts for industrial firmware storage upgrades.
Technical Context
The SST39LF401C-55-4C-EKE implements SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed 7 µs word-program and 18 ms sector/block-erase times independent of cycle count. Its JEDEC-standard x16 parallel interface includes CE#, OE#, WE#, RY/BY#, WP#, and RST# control signals for full compatibility with legacy 16-bit microprocessor buses.
It supports three software-controlled write detection methods-Data# Polling (DQ7), Toggle Bits (DQ6/DQ2), and Ready/Busy#-and integrates CFI Query mode for automatic device identification. The bottom-boot architecture (00000H–01FFFH) and hardware WP#-enabled protection distinguish it from top-boot variants like SST39LF402C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization); supports 16-bit data bus interfacing without glue logic |
| Read Access Time | 55 ns max; enables direct connection to 16 MHz microcontrollers without wait states |
| Supply Voltage | 3.0–3.6 V only; not compatible with 2.7 V operation like SST39VF401C |
| Endurance | 100,000 program/erase cycles typical; sufficient for field firmware updates over 10+ years |
| Data Retention | >100 years at 25°C; qualified for long-lifecycle industrial deployments |
| Active Current | 5 mA typical at 5 MHz; low power consumption during active read operations |
| Standby Current | 3 µA typical; supports battery-backed or ultra-low-power sleep modes |
| Boot Block | Bottom 8 KWord (00000H–01FFFH); protects bootloader code from accidental overwrite |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, JEDEC-standard x16 pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; AMS = A17 selects top/bottom boot blocks during erase |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during write; tri-state when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby when high; required for all operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive; must be low for valid read data |
| WE# | Write Enable | Active-low write strobe; latches address/data edges for command sequencing |
| WP# | Write Protect | Hardware lock for bottom 8 KWord boot sector; grounded to prevent erase/program |
| RST# | Reset | Hardware reset to Read mode; terminates in-progress operations within TRP timing |
| RY/BY# | Ready/Busy# | Open-drain status indicator; pulled low during erase/program; requires external 10–100 kΩ pull-up |
| VDD | Power Supply | 3.0–3.6 V supply; no internal charge pump for VPP generation |
| VSS | Ground | Two dedicated ground pins (pins 3 and 48) for noise immunity and thermal dissipation |
| NC | No Connection | Multiple NC pins (e.g., A13, A9, A12 on TSOP); must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read access to non-suspended sectors during background erase, enabling firmware hot-patching |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid read; no access penalty on wake-up |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space; locked permanently after programming |
| Uniform Sector Architecture | 256 × 2 KWord sectors; enables fine-grained firmware partitioning and incremental updates |
| JEDEC Pinout Compliance | Fully compatible with industry-standard x16 flash sockets and PCB footprints |
| SuperFlash® Reliability | Fixed erase/program timing across lifetime; eliminates software de-rating or cycle-count tracking |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating firmware in programmable logic controllers operating in harsh environments with wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code and application firmware; accessed via 16-bit parallel bus during cold start and field upgrade. Use Value: Bottom-boot protection prevents accidental corruption of critical bootloader; 100,000-cycle endurance supports >10 years of scheduled firmware patches. |
Use Scenario: Secure storage of certified bootloader and diagnostic firmware in FDA-regulated patient monitoring equipment. IC Role / Device Role / Timing Role: Primary flash memory for secure boot sequence execution; interfaces directly with ARM Cortex-M4 MCU's external memory bus. Use Value: Factory-programmed Security ID enables traceable device authentication; >100-year data retention meets medical device lifecycle requirements. |
| Automotive Infotainment System BIOS | Network Router Configuration Storage |
Use Scenario: Holding BIOS and display firmware in automotive head units requiring AEC-Q100-qualified components. IC Role / Device Role / Timing Role: x16 parallel flash memory mapped into CPU address space for fast boot and OTA update staging. Use Value: 55 ns access time enables sub-200 ms boot; erase-suspend allows concurrent UI rendering while flashing new firmware. |
Use Scenario: Storing configuration tables, routing rules, and failover scripts in enterprise-grade Layer 3 switches. IC Role / Device Role / Timing Role: Dedicated configuration memory accessed by MIPS-based network processor during initialization and runtime reconfiguration. Use Value: Hardware WP# ensures immutable base configuration; sector-erase capability permits atomic rule-set updates without full chip erase. |
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-EKE | Wider voltage range (2.7–3.6 V); slower 70 ns access; same 256K×16 density and bottom-boot layout | Preferred for mixed-voltage systems where 2.7 V brownout tolerance is required | Select when system VDD may dip below 3.0 V; verify timing margins at lower voltages |
| MX29LV400CTTI-70G | Same 4 Mbit x16, 70 ns, bottom-boot; uses different command set and lacks erase-suspend/resume | Suitable for cost-sensitive designs where suspend capability is unnecessary | Choose for legacy designs already using Macronix command protocol; confirm CFI compatibility |
Compared with SST39LF401C-55-4C-EKE, the SST39VF401C variant offers broader supply flexibility but sacrifices speed, while the MX29LV400CTTI matches density and boot structure but omits real-time erase suspension-critical for systems requiring concurrent operation during firmware updates.
Availability
SST39LF401C-55-4C-EKE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, automotive infotainment BIOS, network router configuration storage, and embedded system boot code applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF401C-55-4C-EKE 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 a focus on reliability, security, and embedded system integration.
The SST39LF401C-55-4C-EKE belongs to Microchip's Multi-Purpose Flash Plus (MPF+) product line, engineered for high-reliability embedded firmware and configuration storage in industrial, medical, and automotive applications demanding long data retention and robust write protection.
FAQ
What is the exact memory organization and density of the SST39LF401C-55-4C-EKE?
The SST39LF401C-55-4C-EKE is organized as 256K × 16, delivering a total capacity of 4 Mbit (512 KB). This x16 configuration supports direct 16-bit bus interfacing with microcontrollers and DSPs without data multiplexing or external latch logic, simplifying PCB layout and reducing system latency.
Does the SST39LF401C-55-4C-EKE support both hardware and software write protection?
Yes, the SST39LF401C-55-4C-EKE implements dual-layer protection: hardware block protection on the bottom 8 KWord boot sector (00000H–01FFFH) via the WP# pin, and JEDEC-standard Software Data Protection requiring validated six-byte command sequences for erase and three-byte sequences for program operations.
What is the purpose of the RY/BY# pin on the SST39LF401C-55-4C-EKE?
The RY/BY# pin on the SST39LF401C-55-4C-EKE is an open-drain status output that actively pulls low during internal Program or Erase operations and transitions high (via external pull-up) when the device is ready for the next command. It enables hardware-driven polling without consuming CPU cycles for toggle-bit or data-polling reads.
Can the SST39LF401C-55-4C-EKE be used in systems requiring erase-suspend functionality?
Yes, the SST39LF401C-55-4C-EKE fully supports Erase-Suspend and Erase-Resume commands (B0H and 30H), allowing host systems to temporarily halt background sector or block erases, read from any non-suspended location, and resume the operation-enabling real-time firmware updates without system interruption.
Is the SST39LF401C-55-4C-EKE compatible with standard JEDEC x16 flash sockets and timing protocols?
Yes, the SST39LF401C-55-4C-EKE conforms strictly to JEDEC standard pinouts and command sets for x16 flash memories. Its CE#/OE#/WE# timing, address/data latching behavior, and read/write detection methods (DQ7, DQ6, RY/BY#) ensure drop-in compatibility with existing 16-bit flash-based designs and reference schematics.
SST39LF401C-55-4C-EKE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFSOP (0.724", 18.40mm Width)
- 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-TSOP
SST39LF401C-55-4C-EKE FAQ
1.How can I place an order for SST39LF401C-55-4C-EKE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF401C-55-4C-EKE 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 reliable?
The price and inventory of SST39LF401C-55-4C-EKE 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 is usually 5 days.
3.What payment methods are accepted for SST39LF401C-55-4C-EKE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF401C-55-4C-EKE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF401C-55-4C-EKE?
SST39LF401C-55-4C-EKE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF401C-55-4C-EKE 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?
For technical support, including SST39LF401C-55-4C-EKE 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 requirements.
6.How does Aetrix verify that SST39LF401C-55-4C-EKE is sourced from the original manufacturer or authorized distributors?
All SST39LF401C-55-4C-EKE 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 meets industry standards.
7.What is the process for return or replacement of SST39LF401C-55-4C-EKE?
All SST39LF401C-55-4C-EKE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF401C-55-4C-EKE, 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 part is unused and in its original packaging.
Return procedure for SST39LF401C-55-4C-EKE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39LF401C-55-4C-EKE Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
