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Microchip Technology SST39LF020-55-4C-NHE
- Part No.:
- SST39LF020-55-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39LF020-55-4C-NHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:347
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Product details
Overview
SST39LF020-55-4C-NHE 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 operation, and uniform 4-Kbyte sector erase architecture. It implements SuperFlash® technology for high endurance and data retention, and is used in embedded firmware storage, BIOS/UEFI code storage, and industrial controller configuration memory.
For engineers reviewing the SST39LF020-55-4C-NHE datasheet, SST39LF020-55-4C-NHE pinout, SST39LF020-55-4C-NHE application, or SST39LF020-55-4C-NHE equivalent, key selection criteria include its 55 ns read timing, 3.0V–3.6V VDD range, JEDEC-standard x8 parallel interface, sector-level erase capability, and PLCC/TSOP-32 packaging compatibility.
Technical Context
This device belongs to Microchip's SST39LF/VF family of parallel-interface flash memories using split-gate SuperFlash® technology. Its architecture features latched address/data buses, hardware/software data protection, and dual write-detection methods (Toggle Bit on DQ6 and Data# Polling on DQ7).
It supports Byte Program (≤20 µs), Sector Erase (≤25 ms), and Chip Erase (≤100 ms) operations under JEDEC-standard command sequences. The device operates across 0°C to +70°C and requires no external VPP - internal charge pump generates programming voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - provides sufficient space for boot code, firmware images, or configuration tables in resource-constrained systems. |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in microcontroller-based systems without wait states at moderate clock speeds. |
| VDD Operating Range | 3.0V–3.6V - compatible with standard 3.3V logic rails and eliminates need for separate 5V or 12V programming supplies. |
| Endurance | 10,000 cycles (min), 100,000 cycles (typ) - supports frequent field updates in programmable logic controllers and network equipment. |
| Data Retention | 100 years (min) - ensures long-term reliability in unattended infrastructure devices such as smart meters and remote sensors. |
| Sector Size | Uniform 4-Kbyte sectors - allows granular firmware patching without erasing full device, reducing update downtime. |
| Standby Current | 1 µA (typ) - minimizes power draw in battery-backed or always-on edge nodes during idle periods. |
Pinout & Package
Package: 32-lead PLCC (plastic leaded chip carrier) and 32-lead TSOP (thin small-outline package), both RoHS-compliant and surface-mountable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | A0–A16 used for byte addressing; A17 selects upper/lower half of 256K-word array (AMS = A17 for SST39LF020). |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; outputs tri-stated when CE# or OE# is high; latched during write cycles. |
| CE# | Chip Enable | Active-low chip select; device enters standby (1 µA) when high; required low for all read/write operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive; must be low during reads, high during writes. |
| WE# | Write Enable | Active-low control for program/erase; initiates command latching and internal timing sequences. |
| VDD | Power Supply | 3.0V–3.6V supply input; powers core logic and internal charge pump for erase/program operations. |
| VSS | Ground | Reference ground for all signals and internal circuitry; must be low-impedance connection. |
| NC | No Connection | Pins 1 and 30 are NC for SST39LF020; unused and must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed erase/program times independent of wear level - eliminates software derating and simplifies timing-critical firmware design. |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and JEDEC-standard 3-/6-byte command lockout - prevents accidental corruption during brown-out or reset. |
| End-of-Write Detection | Dual status reporting via Toggle Bit (DQ6) and Data# Polling (DQ7) - enables efficient polling without dedicated interrupt lines or timeout loops. |
| Uniform 4-Kbyte Sectors | 64 independent erasable sectors - supports modular firmware updates and secure partitioning of boot vs. application code. |
| CMOS I/O Compatibility | Full JEDEC x8 pinout and timing compliance - drop-in replacement for legacy parallel flash in existing PCB layouts. |
Applications
| Industrial PLC Firmware Storage | Embedded Network Router 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 code storage with sector-erase granularity enabling partial firmware patches without full reflash. Use Value: 100-year data retention and 10,000+ endurance cycles ensure reliable operation over 15+ year equipment lifecycles with minimal maintenance. |
Use Scenario: Holding bootloader and initial firmware image in enterprise-grade Ethernet routers requiring secure, field-upgradable code storage. IC Role / Device Role / Timing Role: Parallel x8 interface provides deterministic 55 ns read latency for fast boot execution directly from flash. Use Value: Internal VPP generation and 3.3V-only operation simplify power design and eliminate external high-voltage programming circuitry. |
| Medical Diagnostic Equipment Configuration | Automotive Infotainment System Settings |
|
Use Scenario: Retaining calibration parameters, user preferences, and safety-critical configuration data in portable ultrasound and ECG devices. IC Role / Device Role / Timing Role: Low 1 µA standby current extends battery life between clinical sessions; sector erase isolates config updates from firmware. Use Value: Hardware write inhibit during power transitions prevents corruption during rapid on/off cycling common in handheld medical tools. |
Use Scenario: Storing UI themes, audio profiles, and vehicle-specific settings in automotive head units operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Though rated commercial (0°C to +70°C), SST39LF020-55-4C-NHE is widely qualified for extended temp use in infotainment modules. Use Value: JEDEC-standard command set ensures compatibility with legacy flash drivers in AUTOSAR-compliant bootloaders. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-55EC | 4-Mbit (512K × 8), 55 ns access, 2.7V–3.6V VDD, 100,000-cycle endurance | Higher density but wider voltage range; lacks SuperFlash® fixed-timing guarantee | Select when needing >2 Mbit capacity and broader supply tolerance; verify timing margins for XIP use. |
| SST39VF020-70-4C-NHE | Same 2-Mbit density, 70 ns read access, 2.7V–3.6V VDD, identical pinout and command set | Lower VDD min enables battery-powered designs; slower read timing limits high-speed XIP | Choose for ultra-low-power applications where 70 ns read latency is acceptable and 2.7V operation is mandatory. |
Compared with AM29LV040B-55EC and SST39VF020-70-4C-NHE, the SST39LF020-55-4C-NHE delivers optimal balance of speed (55 ns), supply simplicity (3.0V–3.6V only), and predictable SuperFlash® timing - making it ideal for cost-sensitive, performance-aware embedded systems requiring robust firmware storage.
Availability
SST39LF020-55-4C-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded network router boot code, medical diagnostic equipment configuration, and automotive infotainment system settings requiring stable component supply and long-term lifecycle support.
Supply support for SST39LF020-55-4C-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 Inc. is a leading provider of microcontrollers, analog components, and nonvolatile memory solutions, serving industrial, automotive, and consumer markets with vertically integrated silicon and software offerings.
The SST39LF/VF series was designed specifically for embedded systems requiring reliable, low-voltage, parallel-interface flash memory with JEDEC compatibility and robust data integrity - targeting firmware, BIOS, and configuration storage in cost-sensitive applications.
FAQ
What is the maximum operating temperature range for SST39LF020-55-4C-NHE?
The SST39LF020-55-4C-NHE is specified for commercial operation from 0°C to +70°C. While not officially rated for industrial temperature range (-40°C to +85°C), many design teams successfully deploy SST39LF020-55-4C-NHE in extended-temperature applications with proper thermal margining and validation. Always consult latest Microchip qualification reports for specific lot-level data.
Does SST39LF020-55-4C-NHE require an external VPP voltage for programming?
No. The SST39LF020-55-4C-NHE integrates an internal charge pump that generates the high voltage needed for erase and program operations. Only a single 3.0V–3.6V VDD supply is required - eliminating external VPP circuitry and simplifying board design and BOM.
How does the sector erase function work on SST39LF020-55-4C-NHE?
The SST39LF020-55-4C-NHE contains 64 uniform 4-Kbyte sectors. Sector erase is initiated via a six-byte JEDEC command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SAX/30H), where SAX is the 12-bit sector address. Erase completes in ≤25 ms and is verified via Toggle Bit or Data# Polling.
Is SST39LF020-55-4C-NHE pin-compatible with SST39VF020-70-4C-NHE?
Yes - SST39LF020-55-4C-NHE and SST39VF020-70-4C-NHE share identical 32-pin PLCC/TSOP footprints, pin assignments, command sets, and sector architecture. The primary differences are read access time (55 ns vs. 70 ns) and VDD range (3.0V–3.6V vs. 2.7V–3.6V); substitution requires verification of timing and supply constraints.
What data protection mechanisms does SST39LF020-55-4C-NHE implement?
The SST39LF020-55-4C-NHE implements dual-layer protection: hardware features (noise/glitch filtering, VDD power-up detection, and write-inhibit mode) plus JEDEC-standard software data protection requiring 3-byte sequences for program and 6-byte sequences for erase. These prevent unintended writes during power transitions or noise events.
SST39LF020-55-4C-NHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 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 FAQ
1.How can I place an order for SST39LF020-55-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39LF020-55-4C-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 SST39LF020-55-4C-NHE reliable?
The price and inventory of SST39LF020-55-4C-NHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39LF020-55-4C-NHE is usually 5 days.
3.What payment methods are accepted for SST39LF020-55-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39LF020-55-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39LF020-55-4C-NHE?
SST39LF020-55-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39LF020-55-4C-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 SST39LF020-55-4C-NHE?
For technical support, including SST39LF020-55-4C-NHE 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 requirements.
6.How does Aetrix verify that SST39LF020-55-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST39LF020-55-4C-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 SST39LF020-55-4C-NHE meets industry standards.
7.What is the process for return or replacement of SST39LF020-55-4C-NHE?
All SST39LF020-55-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39LF020-55-4C-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 SST39LF020-55-4C-NHE part is unused and in its original packaging.
Return procedure for SST39LF020-55-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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