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Microchip Technology SST39LF020-55-4C-NHE-T
- Part No.:
- SST39LF020-55-4C-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF020-55-4C-NHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,803
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Product details
Overview
SST39LF020-55-4C-NHE-T from Microchip Technology is a 2-Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with 55 ns read access time, single 3.0V–3.6V supply for both read and write operations, and uniform 4-Kbyte sector erase architecture. It delivers 100,000 program/erase cycles endurance and >100-year data retention, targeting firmware storage in industrial control panels and embedded boot code applications.
For engineers reviewing the SST39LF020-55-4C-NHE-T datasheet, SST39LF020-55-4C-NHE-T pinout, SST39LF020-55-4C-NHE-T application, or SST39LF020-55-4C-NHE-T equivalent, key selection criteria include its 55 ns read timing, 3.0V–3.6V VDD operating range, 4-Kbyte sector erase granularity, JEDEC-standard x8 pinout compatibility, and SuperFlash® technology's fixed erase/program times independent of cycle count.
Technical Context
This device implements Microchip's proprietary SuperFlash® split-gate cell technology with thick-oxide tunneling injector, enabling superior reliability over conventional flash architectures. Its command set follows JEDEC® standard pinouts and software protocols-including three-byte byte-program and six-byte sector/chip erase sequences-with hardware noise/glitch protection and VDD power-up/down detection.
Operation relies on asynchronous CE#/OE#/WE# control logic: CE# enables chip select, OE# gates output buffers, and WE# initiates write cycles. Internal VPP generation eliminates external high-voltage requirements, while end-of-write detection uses Toggle Bit (DQ6) and Data# Polling (DQ7) for deterministic status monitoring without polling overhead.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly supports 256 KB of firmware or configuration data |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 14 MHz microcontroller systems |
| VDD Operating Range | 3.0V–3.6V - compatible with standard 3.3V logic rails without level-shifting |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years of operation |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage applications |
| Sector Size | Uniform 4-Kbyte sectors - allows granular firmware patching without full-chip erasure |
| Byte Program Time | 14 µs typical - reduces update latency during over-the-air (OTA) firmware upgrades |
Pinout & Package
32-Lead PLCC (Plastic Leaded Chip Carrier) package with 1.27 mm pitch, RoHS-compliant, suitable for through-hole reflow assembly. Pin 1 is NC for SST39LF020; pins 6 and 9 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for 256K × 8 addressing; A17 selects upper/lower half of memory array |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit bus; outputs tri-stated when CE# or OE# high; latched during write |
| CE# | Chip Enable | Active-low chip select; device draws standby current (1 µA) when high |
| OE# | Output Enable | Active-low output gate; controls data bus visibility without affecting internal state |
| WE# | Write Enable | Active-low write strobe; initiates byte program, sector erase, or chip erase sequences |
| VDD | Power Supply | 3.0V–3.6V supply; powers all internal logic and SuperFlash® programming circuitry |
| VSS | Ground | Reference return path for all signals and power; must be low-impedance for noise immunity |
| NC | No Connection | Pins 1, 6, 9 - unconnected; must remain floating per JEDEC compliance |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with thick-oxide injector enables fixed 14 µs byte program and 18 ms sector erase times across full lifecycle |
| JEDEC® Standard Compliance | Pinout and command set match industry-standard x8 flash devices, enabling drop-in replacement in legacy designs |
| Hardware + Software Protection | Glitch-resistant WE#/CE# inputs plus mandatory 3-byte (program) or 6-byte (erase) unlock sequences prevent accidental writes |
| End-of-Write Detection | DQ6 Toggle Bit and DQ7 Data# Polling provide deterministic, software-driven status without timer-based delays |
| Low Power Operation | 5 mA active current at 14 MHz and 1 µA standby current reduce thermal load and extend battery life in portable systems |
Applications
| Industrial HMI Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and UI assets in programmable logic controllers (PLCs) and human-machine interface (HMI) terminals requiring field-upgradable code. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; accessed via parallel x8 bus with 55 ns read timing. Use Value: 4-Kbyte sector erase enables partial firmware updates without disrupting operational code, reducing downtime during maintenance. | Use Scenario: Holding secure bootloader code in medical diagnostic equipment where firmware integrity and long-term data retention are critical. IC Role / Device Role / Timing Role: Primary boot memory executing initial system startup sequence; leverages 3.0V–3.6V VDD compatibility with main SoC supply rail. Use Value: 100,000-cycle endurance and >100-year data retention ensure reliable operation over product lifetime without recalibration or replacement. |
| Automotive ECU Configuration | Networking Equipment Parameter Storage |
Use Scenario: Storing calibration tables and vehicle-specific configuration parameters in engine control units (ECUs) operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Configuration memory accessed during ECU power-on self-test (POST); uses CE#/OE# controlled read cycles. Use Value: Industrial temperature grade (0°C to +70°C commercial, optional -40°C to +85°C) and robust noise immunity support automotive-grade reliability requirements. | Use Scenario: Retaining MAC addresses, IP settings, and security keys in Ethernet switches and wireless access points requiring persistent, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure parameter memory isolated from main application processor; protected by hardware write inhibit and software data protection. Use Value: Dual-layer protection (hardware glitch filtering + 6-byte erase unlock) prevents unauthorized parameter modification during network attacks or power faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020 | 55 ns read, 3.0V–3.6V VDD, but 10,000-cycle endurance (vs. 100,000) | Limited rewrite frequency in field-upgrade scenarios | Select SST39LF020-55-4C-NHE-T for high-cycle firmware update applications |
| SST39VF020-70-4C-NHE-T | 2.7V–3.6V VDD range and 70 ns read access (vs. 55 ns) | Better low-voltage operation but slower timing margin for high-speed bus interfaces | Select SST39LF020-55-4C-NHE-T when 55 ns timing and 3.3V-only systems are required |
Compared with AT29LV020 and SST39VF020-70-4C-NHE-T, the SST39LF020-55-4C-NHE-T provides 10× higher endurance and faster read access-critical for systems requiring frequent firmware patches or operating at maximum bus clock rates-while maintaining identical 32-pin PLCC footprint and JEDEC command compatibility.
Availability
SST39LF020-55-4C-NHE-T is available at Aetrix Electronics and suitable for industrial HMI firmware storage, embedded bootloader memory, and automotive ECU configuration requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF020-55-4C-NHE-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 Flash memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and software platforms.
The SST39LF/VF series was designed specifically for cost-sensitive, high-reliability embedded systems requiring fast, low-power, and field-upgradable nonvolatile memory with JEDEC-standard interoperability.
FAQ
What is the maximum operating temperature range for the SST39LF020-55-4C-NHE-T?
The SST39LF020-55-4C-NHE-T is rated for commercial operation from 0°C to +70°C. While the absolute maximum junction temperature is +125°C, sustained operation outside the specified ambient range may affect timing margins and data retention. The SST39LF020-55-4C-NHE-T does not support industrial-grade (-40°C to +85°C) operation-this requires the SST39VF020 variant.
Does the SST39LF020-55-4C-NHE-T require an external VPP voltage for programming?
No, the SST39LF020-55-4C-NHE-T integrates internal VPP generation and operates entirely from a single 3.0V–3.6V VDD supply for both read and write functions. This eliminates external high-voltage circuitry and simplifies board design. The SST39LF020-55-4C-NHE-T achieves this using Microchip's SuperFlash® tunneling injector architecture.
How many address lines does the SST39LF020-55-4C-NHE-T use?
The SST39LF020-55-4C-NHE-T uses 18 address lines (A0–A17) to access its 256K × 8 memory array. A17 serves as the most significant address bit (AMS), distinguishing upper and lower halves of the 2-Mbit space. Pins A18 and above are NC, confirming the device is strictly 256K × 8-not 512K × 8 or larger.
Can the SST39LF020-55-4C-NHE-T be used in a 16-bit data bus configuration?
No, the SST39LF020-55-4C-NHE-T is strictly an x8 (8-bit) parallel interface device with DQ0–DQ7 only. It lacks DQ8–DQ15 pins and does not support word-wide access. Systems requiring 16-bit data paths must use two SST39LF020-55-4C-NHE-T devices in parallel or select a native x16 flash part such as the SST39VF160.
What command sequence is required to perform a sector erase on the SST39LF020-55-4C-NHE-T?
A six-byte software command sequence is mandatory: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SAX/30H, where SAX is the 12-bit sector address. This unlocks and initiates erase; the SST39LF020-55-4C-NHE-T then executes internally in ~18 ms. No external timing control is needed-the SST39LF020-55-4C-NHE-T handles all sequencing autonomously.
SST39LF020-55-4C-NHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH - NOR
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- 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:
- 32-PLCC (11.43x13.97)
SST39LF020-55-4C-NHE-T FAQ
1.How can I place an order for SST39LF020-55-4C-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF020-55-4C-NHE-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 SST39LF020-55-4C-NHE-T reliable?
The price and inventory of SST39LF020-55-4C-NHE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF020-55-4C-NHE-T is usually 5 days.
3.What payment methods are accepted for SST39LF020-55-4C-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF020-55-4C-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF020-55-4C-NHE-T?
SST39LF020-55-4C-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF020-55-4C-NHE-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 SST39LF020-55-4C-NHE-T?
For technical support, including SST39LF020-55-4C-NHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF020-55-4C-NHE-T requirements.
6.How does Aetrix verify that SST39LF020-55-4C-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST39LF020-55-4C-NHE-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 SST39LF020-55-4C-NHE-T meets industry standards.
7.What is the process for return or replacement of SST39LF020-55-4C-NHE-T?
All SST39LF020-55-4C-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF020-55-4C-NHE-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 SST39LF020-55-4C-NHE-T part is unused and in its original packaging.
Return procedure for SST39LF020-55-4C-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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