My Inquiry
My Account
Microchip Technology SST39LF402C-55-4C-EKE-T
- Part No.:
- SST39LF402C-55-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39LF402C-55-4C-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39LF402C-55-4C-EKE-T from Microchip is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash Plus memory IC 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 hardware block protection on the top 8 KWord boot sector, and features erase-suspend/resume capability for real-time system responsiveness.
For engineers reviewing the SST39LF402C-55-4C-EKE-T datasheet, SST39LF402C-55-4C-EKE-T pinout, SST39LF402C-55-4C-EKE-T application, or SST39LF402C-55-4C-EKE-T equivalent, key selection considerations include its TSOP-48 package, JEDEC-standard x16 interface, 100,000-cycle endurance, 3 µA standby current, and compatibility with legacy parallel flash controllers requiring top-boot architecture.
Technical Context
This device implements SuperFlash® technology with split-gate cells and thick-oxide tunneling injectors, enabling fixed erase/program times independent of cycle count-unlike conventional flash. Its command set conforms to JEDEC standard pinouts and software protocols, including CFI Query, Security ID, and Software Data Protection (SDP) with six-byte erase sequences.
The SST39LF402C-55-4C-EKE-T integrates RY/BY# open-drain status signaling, toggle-bit (DQ6/DQ2) and data-polling (DQ7) write completion detection, and hardware reset (RST#) for deterministic recovery. It supports uniform 2 KWord sector erase and flexible block erase (seven 32 KWord + one 16 KWord + two 4 KWord + one 8 KWord blocks), all under single 3.0–3.6 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 256K × 16 (4 Mbit total); enables byte-wide or word-wide addressing in 16-bit bus systems |
| Read Access Time | 55 ns (max); meets timing requirements for 12 MHz+ microcontroller interfaces without 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 field firmware updates over product lifetime |
| Data Retention | >100 years (typical); ensures long-term reliability in unpowered storage applications |
| Standby Current | 3 µA (typical); minimizes power draw in battery-backed or low-power sleep modes |
| Boot Block Protection | Top 8 KWord (0x3E000–0x3FFFF); prevents accidental overwrite of bootloader code during field updates |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, surface-mountable with standard JEDEC x16 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus; A17 is most significant bit; AMS = A17 for sector/block selection |
| DQ0–DQ15 | Data I/O | 16-bit bidirectional data bus; latched internally during writes; tri-stated when CE# or OE# high |
| CE# | Chip Enable | Active-low chip select; device enters standby when high; required low for all operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive; high impedance when high |
| WE# | Write Enable | Active-low control for program/erase; latches address/data on falling/rising edges per JEDEC timing |
| WP# | Write Protect | Hardware lock for top boot block; grounded to prevent erase/program of 0x3E000–0x3FFFF |
| RST# | Reset | Active-low hardware reset; forces return to Read mode and aborts in-progress operations |
| 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; powers all internal logic and SuperFlash® cell operations |
| VSS | Ground | Reference ground for all signals and core circuitry |
| NC | No Connection | Unbonded pins (e.g., A13, A9, A12, A8, A14, A15, A16, A11, A13, A12, A5, A1); no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Erase-Suspend/Resume | Allows real-time read/program from non-suspended sectors during active erase-critical for interrupt-driven firmware |
| Auto Low Power Mode | Reduces active read current from 5 mA to 3 µA after valid access; eliminates need for explicit power-down sequencing |
| Security ID Space | 128-bit factory-programmed ID + 128-word user-programmable space; supports device authentication and secure provisioning |
| Uniform Sector Architecture | 256 × 2 KWord sectors; simplifies wear leveling and partition management in embedded file systems |
| JEDEC-Compliant Command Set | Fully compatible with industry-standard flash controllers and bootloader ROM routines without custom drivers |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh environments with wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into MCU address space; accessed via parallel x16 bus with 55 ns timing compliance. Use Value: Top-boot hardware protection prevents corruption of critical startup code during remote firmware upgrades over CAN or Ethernet. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment requiring FDA-compliant data integrity. IC Role / Device Role / Timing Role: Configuration and event-log storage with >100-year data retention and 100,000-cycle endurance for frequent calibration updates. Use Value: Security ID feature enables cryptographic binding of device identity to stored calibration records for traceability and anti-counterfeiting. |
| Automotive Infotainment Bootloader | Networking Equipment Image Storage |
Use Scenario: Hosting primary bootloader code in automotive head units that must survive cold cranking (low-VDD transients) and support OTA updates. IC Role / Device Role / Timing Role: Top-boot flash memory interfaced to ARM Cortex-A MCU; leverages RST# and VDD power-up detection for robust reset behavior. Use Value: Hardware reset (RST#) and VDD monitoring ensure deterministic recovery from brown-out conditions without corrupted boot code execution. |
Use Scenario: Storing dual firmware images (active/backup) and FPGA configuration bitstreams in enterprise switches and routers. IC Role / Device Role / Timing Role: Parallel flash memory used for fast boot and fail-safe image rollback; accessed via dedicated memory controller with RY/BY# polling. Use Value: Erase-suspend capability allows background image validation while foreground traffic processing continues uninterrupted. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel NOR flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF402C-70-4C-EKE | Wider VDD range (2.7–3.6 V); slower 70 ns access; same pinout and command set | Better suited for mixed-voltage systems where 2.7 V operation is required during brown-out | Select when system VDD may dip below 3.0 V; otherwise SST39LF402C-55-4C-EKE-T offers faster timing at 3.3 V |
| MX29LV400CTTI-70G | Same 4 Mbit x16, 70 ns, top-boot; different command set (non-JEDEC CFI); requires driver adaptation | Lacks erase-suspend and Security ID; lower cost but reduced feature set for secure/real-time use cases | Choose only if legacy driver support exists and advanced features like suspend/resume are unnecessary |
Compared with SST39VF402C-70-4C-EKE and MX29LV400CTTI-70G, the SST39LF402C-55-4C-EKE-T provides the fastest read timing (55 ns) within its voltage range, integrated erase-suspend for real-time responsiveness, and factory-programmed Security ID-making it optimal for safety-critical or secure firmware storage where performance and feature completeness are prioritized.
Availability
SST39LF402C-55-4C-EKE-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive infotainment, networking equipment, and embedded firmware storage requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF402C-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 leading provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39LF402C-55-4C-EKE-T belongs to the Multi-Purpose Flash Plus (MPF+) family, engineered specifically for reliable, low-power, high-endurance firmware and configuration storage in resource-constrained embedded systems.
FAQ
What is the exact memory organization and density of the SST39LF402C-55-4C-EKE-T?
The SST39LF402C-55-4C-EKE-T is organized as 256K × 16, delivering a total capacity of 4 Mbit (512 KB). This x16 configuration supports 16-bit parallel bus interfacing, with address lines A0–A17 (18 bits) and data lines DQ0–DQ15. The device maps directly into microcontroller memory spaces requiring JEDEC-compliant NOR flash with top-boot architecture.
Does the SST39LF402C-55-4C-EKE-T support hardware write protection, and how is it configured?
Yes, the SST39LF402C-55-4C-EKE-T supports hardware block protection on the top 8 KWord boot sector (0x3E000–0x3FFFF). Protection is enabled by grounding the WP# pin; when WP# is high (or floating, due to internal pull-up), the sector is unprotected. This mechanism prevents accidental erase or program of bootloader code during system updates or power transitions.
What are the supported methods to detect completion of program or erase operations on the SST39LF402C-55-4C-EKE-T?
The SST39LF402C-55-4C-EKE-T provides three concurrent detection methods: Ready/Busy# (RY/BY#) open-drain signal, Data# Polling (DQ7), and Toggle Bits (DQ6 and DQ2). RY/BY# requires an external pull-up resistor; DQ7 toggles complement during operation and stabilizes to true data upon completion; DQ6 toggles continuously until operation ends. All methods are valid after defined WE#/CE# edge counts per operation type.
Is the SST39LF402C-55-4C-EKE-T compatible with JEDEC-standard flash controllers and command sets?
Yes, the SST39LF402C-55-4C-EKE-T fully complies with JEDEC standard pinouts and command definitions for x16 parallel NOR flash. It supports CFI Query mode (command 0x98), Software Product ID (0x90), and standard erase/program sequences-including six-byte sector/block erase and three-byte program initiation-all without requiring vendor-specific drivers or timing adjustments.
What package type and mounting configuration does the SST39LF402C-55-4C-EKE-T use?
The SST39LF402C-55-4C-EKE-T is supplied in a 48-lead TSOP (Thin Small Outline Package) with 12 mm × 20 mm body dimensions and standard gull-wing leads. It is RoHS-compliant, surface-mountable, and matches JEDEC MO-141AC mechanical specifications-enabling drop-in replacement in existing PCB layouts designed for 48-pin x16 flash devices.
SST39LF402C-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
SST39LF402C-55-4C-EKE-T FAQ
1.How can I place an order for SST39LF402C-55-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF402C-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 SST39LF402C-55-4C-EKE-T reliable?
The price and inventory of SST39LF402C-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 SST39LF402C-55-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39LF402C-55-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF402C-55-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF402C-55-4C-EKE-T?
SST39LF402C-55-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF402C-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 SST39LF402C-55-4C-EKE-T?
For technical support, including SST39LF402C-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 SST39LF402C-55-4C-EKE-T requirements.
6.How does Aetrix verify that SST39LF402C-55-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF402C-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 SST39LF402C-55-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39LF402C-55-4C-EKE-T?
All SST39LF402C-55-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF402C-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 SST39LF402C-55-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39LF402C-55-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39LF402C-55-4C-EKE-T 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…
