My Inquiry
My Account
Microchip Technology SST39LF400A-55-4C-EKE-T
- Part No.:
- SST39LF400A-55-4C-EKE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
SST39LF400A-55-4C-EKE-T.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,753
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39LF400A-55-4C-EKE-T from Microchip Technology is a 4 Mbit (256K × 16) CMOS Multi-Purpose Flash memory IC using SuperFlash technology, operating at 3.0–3.6 V supply, with 55 ns read access time, 100,000 program/erase cycles endurance, and >100 years data retention. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39LF400A-55-4C-EKE-T datasheet, SST39LF400A-55-4C-EKE-T pinout, SST39LF400A-55-4C-EKE-T application, or SST39LF400A-55-4C-EKE-T equivalent, this page delivers verified technical context, JEDEC-compliant x16 asynchronous interface details, sector/block-erase timing, SuperFlash energy efficiency metrics, and real-world use-value for industrial firmware storage.
Technical Context
The SST39LF400A-55-4C-EKE-T implements a split-gate SuperFlash cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports JEDEC-standard x16 asynchronous command sets including Word-Program, Sector-Erase (2 KWord), Block-Erase (32 KWord), and Chip-Erase.
Write operations require a three-byte software data protection (SDP) sequence for programming and six-byte sequences for erases; status detection uses DQ7 Data# Polling and DQ6 Toggle Bit. The device conforms to CFI Query mode and supports Software Product Identification via 00BFH manufacturer ID and 2780H device ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (256K × 16 organization), providing 512 KB of addressable storage space |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 14 MHz bus systems without wait states |
| Supply Voltage | 3.0–3.6 V - compatible with 3.3 V logic domains and eliminates need for separate VPP programming voltage |
| Endurance | 100,000 program/erase cycles - supports frequent firmware updates over product lifetime |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Erase Granularity | Uniform 2 KWord sectors and 32 KWord blocks - allows selective firmware patching without full chip erase |
| Program Time | 14 µs per word - reduces total firmware update time versus conventional NOR flash |
Pinout & Package
Package: 48-lead TSOP (12 mm × 20 mm), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 16 addressing; A17 selects upper half of 4 Mbit array (SST39LF400A-specific) |
| 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 (3 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus visibility during read cycles only |
| WE# | Write Enable | Active-low control for all write operations; initiates SDP command latching and internal timing |
| VDD | Power Supply | 3.0–3.6 V core supply; powers all logic and memory array; no external VPP required |
| VSS | Ground | Two dedicated ground pins (pins 23 and 48) reduce noise coupling in high-speed reads |
| NC | No Connection | Pins 9, 10, 12–15, 18, 19, 21, 22, 24, 25, 27, 28, 30, 31, 33, 34, 36, 37, 39, 40, 42, 43, 45, 46 - electrically isolated |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash cell architecture | Split-gate + thick-oxide tunneling injector enables lower program current and faster erase vs. standard NOR |
| Fixed erase/program timing | Erase and program durations remain constant across 100,000 cycles - no system de-rating required |
| Hardware + software data protection | Glitch immunity (<5 ns), VDD power-up/down detection, and JEDEC SDP prevent accidental writes |
| CFI and Software ID support | Enables automatic flash detection and configuration in bootloader code via standardized query commands |
| Low active/standby current | 9 mA typical active current and 3 µA standby current extend battery life in portable firmware storage |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot and application code storage with in-system reprogrammability via RS-485 or Ethernet interfaces. Use Value: 55 ns read access enables zero-wait-state execution; sector-erase capability permits incremental firmware patches without full reload. | Use Scenario: Holding certified boot loader and diagnostic application code in Class II medical instruments requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, long-retention storage for immutable boot code and versioned application binaries. Use Value: >100-year data retention meets FDA 21 CFR Part 11 archival requirements; hardware/software write protection prevents unauthorized modification. |
| Automotive Infotainment Head Unit | Network Router Configuration Memory |
Use Scenario: Storing UI assets, map data, and OTA-updatable firmware in automotive infotainment systems operating across -40°C to +85°C. IC Role / Device Role / Timing Role: High-reliability, wide-temperature nonvolatile memory for graphics and firmware partitions. Use Value: 100,000-cycle endurance supports multi-year OTA update cycles; 3.0–3.6 V operation matches automotive 3.3 V rail stability. | Use Scenario: Maintaining persistent configuration tables, routing rules, and security certificates in enterprise-grade network routers. IC Role / Device Role / Timing Role: Field-upgradable configuration store accessible via CPU memory-mapped I/O. Use Value: Block-erase (32 KWord) enables fast certificate rotation; CFI support simplifies driver development across multiple flash vendors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV400CBTI-70G | 70 ns read access; 2.7–3.6 V supply; 100,000 cycles; same 48-pin TSOP package | Higher VDD min (2.7 V) enables wider input voltage tolerance but slower read performance | Select when system operates below 3.0 V or requires broader voltage margin at cost of 15 ns latency penalty |
| EN29LV400AB-70TP | 70 ns read; 2.7–3.6 V; 100,000 cycles; JEDEC x16 pinout; no CFI support | Lacks CFI Query mode and Software ID entry - requires vendor-specific drivers | Choose for cost-sensitive designs where standardized flash detection is unnecessary and legacy driver support exists |
Compared with MX29LV400CBTI-70G and EN29LV400AB-70TP, the SST39LF400A-55-4C-EKE-T delivers 15 ns faster read access and integrated CFI support for plug-and-play firmware compatibility, while maintaining identical endurance and package footprint - making it optimal for latency-critical, standards-based embedded systems.
Availability
SST39LF400A-55-4C-EKE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and network router configuration memory requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for SST39LF400A-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 is a global provider of microcontrollers, analog components, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39LF400A-55-4C-EKE-T belongs to the SST39LF/VF Multi-Purpose Flash family, designed specifically for embedded systems needing reliable, low-power, field-upgradable firmware and configuration storage with JEDEC-standard interoperability.
FAQ
What is the exact memory organization and capacity of the SST39LF400A-55-4C-EKE-T?
The SST39LF400A-55-4C-EKE-T is organized as 256K × 16, delivering 4 Mbit (512 KB) of storage. This configuration provides a 19-bit address bus (A0–A17, with A17 active for 4 Mbit addressing) and a 16-bit data bus (DQ0–DQ15), fully compliant with JEDEC x16 asynchronous flash standards. Its density supports typical embedded firmware images up to several hundred kilobytes.
Does the SST39LF400A-55-4C-EKE-T require an external VPP voltage for programming?
No, the SST39LF400A-55-4C-EKE-T does not require an external VPP voltage. It performs all program and erase operations using only the 3.0–3.6 V VDD supply, thanks to on-chip charge pump circuitry. This eliminates the need for additional voltage rails or level shifters, simplifying board design and reducing BOM cost compared to older flash technologies.
How does the SST39LF400A-55-4C-EKE-T indicate completion of a program or erase operation?
The SST39LF400A-55-4C-EKE-T provides two hardware-supported status detection methods: Data# Polling (DQ7) and Toggle Bit (DQ6). During internal operations, DQ7 returns complemented data until completion, then true data; DQ6 toggles between 0 and 1 until completion, then holds steady. Both are valid after the fourth WE# pulse for programming and sixth for erases - enabling efficient polling without timeouts.
Is the SST39LF400A-55-4C-EKE-T compatible with standard JEDEC x16 flash controllers?
Yes, the SST39LF400A-55-4C-EKE-T conforms fully to JEDEC standard pinouts and command sets for x16 asynchronous flash memory. It supports standard Read, Word-Program, Sector-Erase, Block-Erase, and Chip-Erase commands, and includes CFI Query mode for automatic controller detection - ensuring drop-in compatibility with existing JEDEC-compliant flash interfaces and bootloader firmware.
What is the guaranteed data retention period for the SST39LF400A-55-4C-EKE-T under normal operating conditions?
The SST39LF400A-55-4C-EKE-T guarantees greater than 100 years of data retention at 25°C ambient temperature and rated VDD (3.0–3.6 V), based on accelerated life testing per industry standards. Retention remains robust across the full commercial temperature range (0°C to +70°C), making it suitable for long-deployment infrastructure and medical devices where data integrity must persist over decades without refresh.
SST39LF400A-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:
- 20µs
- 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
SST39LF400A-55-4C-EKE-T FAQ
1.How can I place an order for SST39LF400A-55-4C-EKE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF400A-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 SST39LF400A-55-4C-EKE-T reliable?
The price and inventory of SST39LF400A-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 SST39LF400A-55-4C-EKE-T is usually 5 days.
3.What payment methods are accepted for SST39LF400A-55-4C-EKE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF400A-55-4C-EKE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF400A-55-4C-EKE-T?
SST39LF400A-55-4C-EKE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF400A-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 SST39LF400A-55-4C-EKE-T?
For technical support, including SST39LF400A-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 SST39LF400A-55-4C-EKE-T requirements.
6.How does Aetrix verify that SST39LF400A-55-4C-EKE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF400A-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 SST39LF400A-55-4C-EKE-T meets industry standards.
7.What is the process for return or replacement of SST39LF400A-55-4C-EKE-T?
All SST39LF400A-55-4C-EKE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF400A-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 SST39LF400A-55-4C-EKE-T part is unused and in its original packaging.
Return procedure for SST39LF400A-55-4C-EKE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39LF400A-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…
