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Microchip Technology SST39SF020A-55-4C-NHE
- Part No.:
- SST39SF020A-55-4C-NHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39SF020A-55-4C-NHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:548
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Product details
Overview
SST39SF020A-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 4.5V–5.5V supply operation, and uniform 4-Kbyte sector erase architecture. It implements SuperFlash® technology for high reliability in embedded firmware storage, BIOS updates, and industrial control program memory.
For engineers reviewing the SST39SF020A-55-4C-NHE datasheet, SST39SF020A-55-4C-NHE pinout, SST39SF020A-55-4C-NHE application, or SST39SF020A-55-4C-NHE equivalent, key selection criteria include JEDEC-standard x8 parallel interface compatibility, hardware/software data protection, 100,000-program/erase cycle endurance, and TSOP-32 packaging for space-constrained PCB layouts.
Technical Context
This device belongs to Microchip's SST39SFx family of parallel-interface Flash memories using split-gate SuperFlash® cells, enabling fixed erase/program times independent of wear level. Its command set conforms to JEDEC-standard pinouts and software protocols for x8 memories, supporting Byte Program, Sector Erase, and Chip Erase via six-byte software data protection sequences.
It operates across commercial temperature range (0°C to +70°C), features TTL I/O compatibility, and integrates dual write-detection methods-Data# Polling (DQ7) and Toggle Bit (DQ6)-to eliminate polling overhead during internal operations. The device uses latched address/data buses and internal VPP generation, eliminating external high-voltage programming supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly maps to 256 KB of byte-addressable nonvolatile storage |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) in 14 MHz microcontroller systems |
| Endurance | 100,000 program/erase cycles - supports field firmware updates over product lifetime |
| Data Retention | Greater than 100 years - ensures long-term integrity of boot code and calibration data |
| Supply Voltage | 4.5V–5.5V - compatible with legacy 5V logic systems without level-shifting |
| Active Current | 10 mA typical at 14 MHz - low dynamic power for battery-backed or energy-sensitive applications |
| Standby Current | 30 µA typical - minimizes quiescent power in always-on embedded controllers |
| Sector Size | Uniform 4-Kbyte sectors - enables granular firmware partitioning and safe over-the-air update rollback |
Pinout & Package
Package: 32-lead TSOP (Thin Small Outline Package), lead pitch 0.5 mm, body width 10.16 mm - optimized for high-density PCBs in consumer and industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 256K-byte addressing; A16 is MSB for SST39SF020A |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus with tri-state outputs controlled by CE# and OE# |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 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 (program/erase); initiates command latching |
| VDD | Power Supply | +4.5V to +5.5V supply input; powers core logic and SuperFlash® cell programming |
| VSS | Ground | Reference ground for all I/O and internal circuitry |
| NC (Pin 1, Pin 30) | No Connection | Pin 1: NC for SST39SF020A; Pin 30: A17 (not NC) - critical for correct PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 18 ms sector erase and 14 µs byte program times - eliminates wear-dependent timing derating in firmware update routines |
| JEDEC-Compliant Interface | Standard x8 parallel pinout and command set - enables drop-in replacement in existing 5V microcontroller designs |
| Hardware + Software Data Protection | Glitch immunity (<5 ns), VDD power-up detection, and six-byte SDP sequences - prevents corruption during brown-out or reset |
| End-of-Write Detection | Dual status signaling via DQ7 (Data# Polling) and DQ6 (Toggle Bit) - allows host CPU to perform concurrent tasks during erase/program |
| RoHS Compliance | Lead-free TSOP package with halogen-free molding compound - meets global environmental compliance requirements |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Memory |
|---|---|
Use Scenario: Storing ladder logic programs and configuration parameters in programmable logic controllers requiring field updates without hardware replacement. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; accessed via parallel bus during boot and runtime. Use Value: 100,000-cycle endurance supports >10 years of scheduled firmware revisions; 55 ns access enables real-time scan cycle execution. |
Use Scenario: Holding BIOS/UEFI firmware images in desktop motherboards and embedded x86 systems with legacy 5V I/O interfaces. IC Role / Device Role / Timing Role: Primary boot memory providing XIP-capable instruction fetch; selected for JEDEC-compatibility with Intel 80486/Pentium-era chipsets. Use Value: Uniform 4-Kbyte sectors allow safe partial rewrites of ACPI tables or SMBIOS data without erasing entire BIOS image. |
| Medical Device Calibration Data | Automotive Body Control Module Code |
Use Scenario: Retaining factory-calibrated sensor offsets and safety-critical thresholds in portable diagnostic equipment with infrequent field recalibration. IC Role / Device Role / Timing Role: Dedicated configuration memory accessed only during initialization; isolated from main application code space. Use Value: >100-year data retention guarantees accuracy over device service life; 30 µA standby current extends battery backup duration. |
Use Scenario: Storing lighting control algorithms and door-lock actuation logic in automotive BCMs operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Secondary program memory supplementing microcontroller internal flash; programmed via JTAG or CAN bootloader. Use Value: Single 4.5V–5.5V supply simplifies power design; hardware write inhibit prevents corruption during vehicle cranking transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel-interface Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-70EC | 4-Mbit density, 70 ns access, 3.0V–3.6V supply only - requires level-shifting for 5V systems | Targeted at newer 3.3V embedded designs; lacks native 5V compatibility | Select only if migrating to 3.3V architecture and needing higher density; not pin-compatible |
| SST39VF020-70-4C-NHE | Same 2-Mbit density but 3.0V–3.6V supply; 70 ns access; different command set and sector map | Designed for low-voltage portable applications; incompatible voltage domain and timing | Use only in new 3.3V designs; requires firmware rewrite due to differing SDP sequence and erase behavior |
Compared with AM29LV040B-70EC and SST39VF020-70-4C-NHE, the SST39SF020A-55-4C-NHE uniquely supports direct 5V integration, faster 55 ns read timing, and guaranteed 100,000-cycle endurance under full-spec voltage - making it the sole choice for legacy 5V industrial and computing platforms requiring field-upgradable firmware.
Availability
SST39SF020A-55-4C-NHE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS memory, medical device calibration data retention, and automotive body control module code storage requiring stable component supply across extended product lifecycles.
Supply support for SST39SF020A-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 Flash memory solutions, serving industrial, automotive, and computing markets with vertically integrated silicon and software.
The SST39SFx family was designed specifically for cost-sensitive, high-reliability 5V embedded systems requiring field-upgradable nonvolatile storage - emphasizing JEDEC compatibility, long data retention, and robust write-protection schemes.
FAQ
What is the memory organization of the SST39SF020A-55-4C-NHE?
The SST39SF020A-55-4C-NHE is organized as 256K × 8, delivering 2 Mbit (256 KB) of byte-addressable Flash memory. Its 17 address lines (A0–A16) fully decode the 256K address space, with uniform 4-Kbyte sectors enabling precise firmware partitioning. This structure is confirmed in the device's block diagram and pin description table.
Does the SST39SF020A-55-4C-NHE support 5V-only operation?
Yes, the SST39SF020A-55-4C-NHE operates exclusively within 4.5V–5.5V, with no 3.3V or mixed-voltage capability. Its TTL-compatible I/Os, VDD power-up detection, and hardware write inhibit are all specified for this 5V range - making it suitable for legacy systems where level shifters are undesirable or impractical.
How does the SST39SF020A-55-4C-NHE handle write completion detection?
The SST39SF020A-55-4C-NHE provides two concurrent methods: Data# Polling on DQ7 (complement-to-data toggle) and Toggle Bit on DQ6 (alternating 0/1). Both become valid after the fourth WE# pulse for byte program and sixth pulse for sector/chip erase - allowing the host to poll asynchronously without blocking other operations.
What package type is used for the SST39SF020A-55-4C-NHE?
The SST39SF020A-55-4C-NHE uses a 32-lead TSOP (Thin Small Outline Package) with 0.5 mm lead pitch and 10.16 mm body width. Pin 1 is NC; Pin 30 is A17 - a critical distinction from SST39SF010A (where Pin 30 is NC) that must be observed in PCB layout.
Is the SST39SF020A-55-4C-NHE RoHS compliant?
Yes, the SST39SF020A-55-4C-NHE is RoHS compliant per the manufacturer's documentation, using lead-free terminations and halogen-free molding compound. This compliance is explicitly stated in the "Features" section of the DS20005022F datasheet and verified in packaging diagrams.
SST39SF020A-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:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39SF020A-55-4C-NHE FAQ
1.How can I place an order for SST39SF020A-55-4C-NHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-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 SST39SF020A-55-4C-NHE reliable?
The price and inventory of SST39SF020A-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 SST39SF020A-55-4C-NHE is usually 5 days.
3.What payment methods are accepted for SST39SF020A-55-4C-NHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-55-4C-NHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-55-4C-NHE?
SST39SF020A-55-4C-NHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-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 SST39SF020A-55-4C-NHE?
For technical support, including SST39SF020A-55-4C-NHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-55-4C-NHE requirements.
6.How does Aetrix verify that SST39SF020A-55-4C-NHE is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-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 SST39SF020A-55-4C-NHE meets industry standards.
7.What is the process for return or replacement of SST39SF020A-55-4C-NHE?
All SST39SF020A-55-4C-NHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-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 SST39SF020A-55-4C-NHE part is unused and in its original packaging.
Return procedure for SST39SF020A-55-4C-NHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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