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Microchip Technology SST39LF020-45-4C-NHE
- Part No.:
- SST39LF020-45-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF020-45-4C-NHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,095
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Product details
Overview
SST39LF020-45-4C-NHE 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 JEDEC-standard x8 parallel interface. It features uniform 4 KB sector erase, 100,000 program/erase cycles endurance, and >100 years data retention - deployed in firmware storage for industrial controllers and embedded boot code applications.
For engineers reviewing the SST39LF020-45-4C-NHE datasheet, SST39LF020-45-4C-NHE pinout, SST39LF020-45-4C-NHE application, or SST39LF020-45-4C-NHE equivalent, key selection criteria include its 32-pin PLCC package, 45 ns read timing, SuperFlash® technology energy efficiency, hardware/software write protection, and compatibility with legacy 8-bit microcontroller bus interfaces.
Technical Context
This device implements SST's proprietary SuperFlash® split-gate cell architecture with thick-oxide tunneling injector, enabling fixed erase/program times independent of cycle count. It supports standard JEDEC x8 command sets including byte-program, sector-erase (30H), chip-erase (10H), and software product ID (90H/F0H).
Operation relies on three control signals - CE#, OE#, and WE# - with latched address/data inputs and tri-state outputs. Write status detection uses Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after the fourth (program) or sixth (erase) WE#/CE# pulse edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - supports full firmware images for 8-bit MCUs with ≤256 KB code space |
| 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 systems; no external VPP required due to internal charge pump |
| Endurance | 100,000 cycles - sufficient for field firmware updates over 10+ years in industrial monitoring devices |
| Data Retention | >100 years - ensures long-term reliability in unpowered storage for medical or infrastructure equipment |
| Active Current | 5 mA typical at 14 MHz - reduces thermal load in fanless embedded enclosures |
| Standby Current | 1 µA typical - enables low-power sleep modes in battery-backed systems |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), 11.43 mm × 13.97 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | A0–A16 select byte location; A16 is MSB for 256K × 8 addressing (0x00000–0x3FFFF) |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; outputs high-impedance when CE# or OE# is high |
| CE# | Chip Enable | Active-low chip select; device enters standby mode when high, consuming only 1 µA |
| OE# | Output Enable | Active-low output gate; controls data bus visibility without affecting internal state |
| WE# | Write Enable | Active-low write control; initiates byte-program or erase command sequences with CE# |
| VDD | Power Supply | +3.0–3.6 V supply; powers internal charge pump for erase/program operations |
| VSS | Ground | Reference ground for all I/O and core logic; requires low-impedance PCB connection |
| NC | No Connect | Pins 12 (A17), 13 (A18), 29 (NC), 30 (NC) are unconnected in SST39LF020-45-4C-NHE PLCC variant |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Split-gate cell with fixed 18 ms sector-erase and 70 ms chip-erase times - eliminates software de-rating over lifetime |
| Uniform 4 KB Sectors | 64 independent sectors enable granular firmware updates without erasing entire image |
| Hardware + Software Protection | Glitch immunity (<5 ns), VDD power-up detection, and JEDEC-standard 3-byte/6-byte command lockout prevent accidental writes |
| CMOS I/O Compatibility | Full TTL/CMOS voltage thresholds (VIH = 0.7×VDD, VIL = 0.8 V) ensure robust interfacing with legacy 8-bit microcontrollers |
| JEDEC Standard Pinout | Pin-for-pin compatible with industry-standard 28Fxxx and 29Fxxx families - simplifies drop-in replacement in existing designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers operating in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to MCU address space; provides 45 ns read access for deterministic scan-cycle execution. Use Value: 100,000-cycle endurance supports remote firmware upgrades over 15+ years; >100-year data retention ensures compliance with IEC 61508 SIL-2 requirements. | Use Scenario: Holding certified bootloader and safety-critical initialization routines in portable diagnostic equipment requiring FDA 510(k) validation. IC Role / Device Role / Timing Role: Primary boot ROM accessed during cold start; operates across 0°C to +70°C commercial range with guaranteed 3.0–3.6 V VDD margin. Use Value: Hardware write inhibit prevents corruption during power brownouts; software ID (D5H/D6H) enables automated BOM verification during manufacturing test. |
| Automotive Infotainment Head Unit | Networking Equipment Configuration |
Use Scenario: Storing UI assets and radio stack firmware in automotive head units where ESD robustness and thermal stability are critical. IC Role / Device Role / Timing Role: Parallel x8 flash memory interfaced to ARM9-based SoC; uses CE#/OE# gating for low-latency display asset fetches. Use Value: 1 µA standby current extends battery drain time during vehicle sleep mode; RoHS/REACH compliance meets automotive OEM material declarations. | Use Scenario: Retaining switch/router configuration profiles and firmware patches in enterprise Ethernet switches with hot-swap capability. IC Role / Device Role / Timing Role: Standalone configuration store accessed via dedicated 8-bit bus; sector-erase allows atomic update of VLAN or ACL tables. Use Value: Uniform 4 KB sectors enable zero-downtime config reloads; toggle-bit polling simplifies interrupt-driven update status monitoring in real-time OS. |
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 read access; lacks SuperFlash® fixed-timing guarantee | Higher program/erase latency variability over lifetime; requires software margining | Select when cost sensitivity outweighs long-term timing predictability |
| MX29LV020C | 2 Mbit, 3.0–3.6 V, 70 ns read; supports CFI query but no software ID command | No built-in manufacturer/device ID readback; requires external EEPROM for BOM traceability | Select for legacy CFI-compliant toolchains where ID verification is handled externally |
Compared with AT29LV020 and MX29LV020C, the SST39LF020-45-4C-NHE delivers superior timing consistency across its full lifecycle, lower active power (5 mA vs. ≥8 mA), and integrated software ID for automated production line verification - making it optimal for high-reliability, long-lifecycle embedded systems.
Availability
SST39LF020-45-4C-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, automotive infotainment head units, and networking equipment configuration requiring stable component supply and long-term obsolescence management.
Supply support for SST39LF020-45-4C-NHE 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, FPGA, and memory solutions, acquired Silicon Storage Technology (SST) in 2010 to expand its nonvolatile memory portfolio.
The SST39LF series was designed specifically for cost-sensitive, high-reliability embedded applications requiring fast parallel flash with robust write protection and extended data retention - targeting industrial control, medical, and communications markets.
FAQ
What is the maximum operating frequency supported by SST39LF020-45-4C-NHE?
The SST39LF020-45-4C-NHE does not operate at a clock frequency; it is an asynchronous parallel flash memory. Its 45 ns read access time supports reliable interfacing with 8-bit microcontrollers running up to ~14 MHz bus clocks, assuming proper setup/hold timing margins per Table 12. No internal oscillator or clock input is present.
Does SST39LF020-45-4C-NHE require an external VPP voltage for programming?
No. The SST39LF020-45-4C-NHE integrates an internal charge pump that generates the high voltage needed for erase and program operations from the 3.0–3.6 V VDD supply alone. This eliminates the need for external VPP circuitry, simplifying board design and reducing BOM cost.
How is write protection implemented on SST39LF020-45-4C-NHE?
SST39LF020-45-4C-NHE implements dual-layer protection: hardware-level noise/glitch immunity (<5 ns pulses ignored), VDD power-up detection (writes inhibited below 1.5 V), and software-level JEDEC-standard 3-byte (program) or 6-byte (erase) command sequences. The device ships with software data protection permanently enabled.
Can SST39LF020-45-4C-NHE be used as a direct replacement for SST39LF010 or SST39LF040?
No - while pin-compatible in the same 32-pin PLCC package, the SST39LF020-45-4C-NHE has 256K × 8 organization (A0–A16), differing from SST39LF010 (128K × 8, A0–A15) and SST39LF040 (512K × 8, A0–A18). Address decoding and firmware image size must be validated for each variant.
What package type is used for SST39LF020-45-4C-NHE?
The SST39LF020-45-4C-NHE uses a 32-lead PLCC (Plastic Leaded Chip Carrier) package, 11.43 mm × 13.97 mm body size, with gull-wing leads. This package is socket-compatible with legacy 28Fxxx and 29Fxxx families and supports reflow soldering per J-STD-020.
SST39LF020-45-4C-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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:
- 32-PLCC (11.43x13.97)
SST39LF020-45-4C-NHE FAQ
1.How can I place an order for SST39LF020-45-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF020-45-4C-NHE 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-NHE reliable?
The price and inventory of SST39LF020-45-4C-NHE 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-NHE is usually 5 days.
3.What payment methods are accepted for SST39LF020-45-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF020-45-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF020-45-4C-NHE?
SST39LF020-45-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF020-45-4C-NHE 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-NHE?
For technical support, including SST39LF020-45-4C-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39LF020-45-4C-NHE requirements.
6.How does Aetrix verify that SST39LF020-45-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST39LF020-45-4C-NHE 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-NHE meets industry standards.
7.What is the process for return or replacement of SST39LF020-45-4C-NHE?
All SST39LF020-45-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF020-45-4C-NHE, 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-NHE part is unused and in its original packaging.
Return procedure for SST39LF020-45-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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