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Microchip Technology SST39LF020-45-4C-B3KE
- Part No.:
- SST39LF020-45-4C-B3KE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFBGA
- Datasheet:
-
SST39LF020-45-4C-B3KE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 48TFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,012
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Product details
Overview
SST39LF020-45-4C-B3KE from Microchip Technology is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with 3.0–3.6 V single-supply operation, 45 ns read access time, and uniform 4 KB sector-erase architecture. It implements SST's SuperFlash technology with split-gate cells, delivering 100,000 program/erase cycles and >100 years data retention. It is used in embedded firmware storage for industrial controllers requiring field-upgradable code.
For engineers reviewing the SST39LF020-45-4C-B3KE datasheet, SST39LF020-45-4C-B3KE pinout, SST39LF020-45-4C-B3KE application, or SST39LF020-45-4C-B3KE equivalent, key selection criteria include JEDEC-compliant x8 parallel interface timing, hardware/software data protection, latched address/data bus, and compatibility with legacy 32-pin PLCC-based boot memory sockets.
Technical Context
This device operates as a nonvolatile parallel-interface flash memory with asynchronous read and byte-program capability. Its SuperFlash architecture uses thick-oxide tunneling injection and split-gate cells to achieve fixed erase/program times independent of cycle count - eliminating software de-rating over lifetime.
It supports standard JEDEC command sets including Software Data Protection (three-byte unlock for program, six-byte for erase), Toggle Bit (DQ6) and Data# Polling (DQ7) for end-of-write detection, and Product Identification mode (Manufacturer ID = BFh, Device ID = D6h). All operations are controlled via CE#, OE#, and WE# with CMOS-compatible voltage thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - provides sufficient space for boot code + configuration in resource-constrained microcontroller systems. |
| Read Access Time | 45 ns - enables direct execution from flash (XIP) at up to ~14 MHz system clock 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 - supports frequent firmware updates in remote monitoring or OTA-capable devices. |
| Data Retention | >100 years - ensures long-term reliability in unattended infrastructure equipment (e.g., utility meters, building controllers). |
| Sector Size | Uniform 4 KB sectors - allows granular firmware partitioning (e.g., bootloader, app, parameter storage) without full-chip erasure. |
| Write Timing | Byte-program: 14 µs typical; Sector-erase: 18 ms typical - enables fast field updates with minimal downtime. |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS-compliant, 11.43 mm × 13.97 mm footprint - compatible with legacy socketed designs and reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A16 = MSB); A12–A16 select 4 KB sector during erase; latched on falling edge of CE# or WE#. |
| DQ0–DQ7 | Data I/O | 8-bit bidirectional data bus; tri-stated when CE# or OE# high; DQ6 = Toggle Bit, DQ7 = Data# Polling status indicator. |
| CE# | Chip Enable | Active-low chip select; must be low for read/write; controls internal address latch timing and power state transition. |
| OE# | Output Enable | Active-low output gate; enables data output during read; high-Z when asserted high or during write operations. |
| WE# | Write Enable | Active-low write control; initiates byte-program, sector-erase, and chip-erase command sequences; latches data on rising edge. |
| VDD | Power Supply | +3.0–3.6 V supply; powers core logic and memory array; includes internal VPP generation for programming. |
| VSS | Ground | Reference ground for all signals and internal circuitry; decoupling capacitor required per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide tunneling injector enables fixed 14 µs byte-program and 18 ms sector-erase times across full lifetime - no software aging compensation required. |
| JEDEC Standard Compliance | Pinout and command set conform to JEDEC MO-115 for x8 flash memories - ensures drop-in replacement in existing 32-pin PLCC designs. |
| Hardware + Software Data Protection | Includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection, and mandatory three/four/six-byte unlock sequences - prevents accidental writes during brown-out or reset. |
| Latched Address/Data Bus | Internal latching eliminates external address/data register requirements - simplifies PCB layout and reduces component count in microcontroller boot memory interfaces. |
| Low Power Standby | 1 µA typical standby current - suitable for battery-backed applications such as smart sensors and portable diagnostic tools. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
|
Use Scenario: Storing and updating firmware for programmable logic controllers deployed in factory automation environments with infrequent but critical field upgrades. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to microcontroller address space; accessed asynchronously during cold start and firmware update routines. Use Value: 45 ns read access enables zero-wait-state XIP execution; 4 KB sector granularity allows safe dual-bank firmware swapping without interrupting runtime logic. |
Use Scenario: Holding certified bootloader and safety-critical application code in Class II medical instruments requiring regulatory-compliant firmware traceability and integrity. IC Role / Device Role / Timing Role: Secure, tamper-resistant code storage with hardware write inhibit and software lock; verified via Product ID (D6h) during power-on self-test. Use Value: 100,000-cycle endurance supports full lifecycle validation; >100-year retention meets FDA 21 CFR Part 11 long-term recordkeeping requirements. |
| Telecom Base Station Configuration | Automotive Body Control Module (BCM) |
|
Use Scenario: Storing regional RF calibration tables and protocol stack parameters in outdoor telecom base stations exposed to wide temperature swings (-40°C to +85°C). IC Role / Device Role / Timing Role: Parallel-interface configuration memory accessed by DSP during initialization; erased/rewritten only during firmware patch deployment. Use Value: Industrial-grade 3.0–3.6 V operation and 100-year retention ensure stable parameter storage across thermal cycling and extended service intervals. |
Use Scenario: Hosting vehicle-specific configuration data (e.g., door lock logic, lighting profiles) in BCMs where EEPROM wear-out limits necessitate flash-based alternatives. IC Role / Device Role / Timing Role: Secondary nonvolatile memory supplementing main MCU flash; updated via CAN diagnostics using custom bootloader commands. Use Value: Uniform 4 KB sectors enable atomic parameter group updates; software data protection prevents corruption during vehicle battery transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020 | 2 Mbit, 3.0–3.6 V, 55 ns access, 100K cycles - slower read timing and no Toggle Bit status signaling. | Lacks DQ6 Toggle Bit; relies solely on Data# Polling - increases host CPU overhead during write verification. | Select when board layout already accommodates 55 ns timing margin and software stack is optimized for polling-only detection. |
| SST39VF020-55-4C-B3K | 2 Mbit, 2.7–3.6 V, 55 ns access, same SuperFlash architecture - wider VDD range but slower speed grade. | Supports lower-voltage operation (2.7 V) for battery-powered systems, but requires longer read cycles - may impact real-time boot latency. | Choose for portable or energy-harvesting applications where supply voltage dips below 3.0 V, accepting 10 ns timing penalty. |
Compared with AT29LV020 and SST39VF020-55-4C-B3K, the SST39LF020-45-4C-B3KE delivers the fastest deterministic read performance (45 ns) and most robust write-status feedback (dual DQ6/DQ7 detection), making it optimal for time-critical embedded boot and update workflows.
Availability
SST39LF020-45-4C-B3KE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, telecom base station configuration, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF020-45-4C-B3KE 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 acquired Silicon Storage Technology (SST) in 2010 and now manufactures and supports the SST39LF/VF family as part of its broad portfolio of reliable, long-lifecycle memory solutions.
The SST39LF020-45-4C-B3KE belongs to the SST39LF Multi-Purpose Flash product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring field-upgradable firmware with JEDEC-standard compatibility and minimal external support circuitry.
FAQ
What is the exact memory organization of the SST39LF020-45-4C-B3KE?
The SST39LF020-45-4C-B3KE is organized as 256K × 8 bits (2 Mbit total), with 17 address lines (A0–A16) and an 8-bit bidirectional data bus (DQ0–DQ7). It features uniform 4 KB sectors (64 sectors total), each independently erasable. This structure supports modular firmware partitioning and avoids full-chip erasure during updates - a key design advantage of the SST39LF020-45-4C-B3KE in field-deployed systems.
Does the SST39LF020-45-4C-B3KE require an external VPP voltage for programming?
No, the SST39LF020-45-4C-B3KE integrates internal VPP generation and operates from a single 3.0–3.6 V supply for both read and write operations. This eliminates the need for external high-voltage circuitry, simplifying board design and reducing BOM cost - a defining feature of the SST39LF020-45-4C-B3KE compared to older flash families requiring 12 V VPP.
How is write completion detected on the SST39LF020-45-4C-B3KE?
The SST39LF020-45-4C-B3KE supports two hardware-supported methods: Data# Polling (DQ7 toggles complement/data until completion) and Toggle Bit (DQ6 alternates 0/1 during operation, then stabilizes). Both are valid after the fourth WE# pulse for programming and sixth for erase. These mechanisms allow host firmware to poll efficiently without fixed delays - a critical capability built into the SST39LF020-45-4C-B3KE's SuperFlash architecture.
Is the SST39LF020-45-4C-B3KE pin-compatible with other devices in the SST39LF/VF family?
Yes - the SST39LF020-45-4C-B3KE shares identical 32-lead PLCC pinout and command set with SST39LF010 and SST39LF040 (same voltage range), and matches SST39VF020 in pin assignment (though VF variants use 2.7–3.6 V and have 55 ns timing). JEDEC compliance ensures mechanical and electrical interoperability in socketed designs - a core compatibility guarantee of the SST39LF020-45-4C-B3KE.
What data protection mechanisms does the SST39LF020-45-4C-B3KE implement?
The SST39LF020-45-4C-B3KE combines hardware and software protection: noise/glitch filtering (<5 ns pulse rejection), VDD power-up/down detection (<1.5 V inhibit), and mandatory JEDEC-standard unlock sequences (three-byte for program, six-byte for erase). These prevent unintended writes during power transitions or EMI events - essential for maintaining firmware integrity in the SST39LF020-45-4C-B3KE's target applications.
SST39LF020-45-4C-B3KE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 48-TFBGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- 45 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TFBGA
SST39LF020-45-4C-B3KE FAQ
1.How can I place an order for SST39LF020-45-4C-B3KE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF020-45-4C-B3KE 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 SST39LF020-45-4C-B3KE reliable?
The price and inventory of SST39LF020-45-4C-B3KE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF020-45-4C-B3KE is usually 5 days.
3.What payment methods are accepted for SST39LF020-45-4C-B3KE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF020-45-4C-B3KE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF020-45-4C-B3KE?
SST39LF020-45-4C-B3KE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF020-45-4C-B3KE 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 SST39LF020-45-4C-B3KE?
For technical support, including SST39LF020-45-4C-B3KE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF020-45-4C-B3KE requirements.
6.How does Aetrix verify that SST39LF020-45-4C-B3KE is sourced from the original manufacturer or authorized distributors?
All SST39LF020-45-4C-B3KE 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 SST39LF020-45-4C-B3KE meets industry standards.
7.What is the process for return or replacement of SST39LF020-45-4C-B3KE?
All SST39LF020-45-4C-B3KE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF020-45-4C-B3KE, 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 SST39LF020-45-4C-B3KE part is unused and in its original packaging.
Return procedure for SST39LF020-45-4C-B3KE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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