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Microchip Technology SST39SF020A-55-4I-NHE-T
- Part No.:
- SST39SF020A-55-4I-NHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
SST39SF020A-55-4I-NHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,218
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Product details
Overview
SST39SF020A-55-4I-NHE-T 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 delivers 100,000 program/erase cycles endurance and >100 years data retention, serving as nonvolatile code/data storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the SST39SF020A-55-4I-NHE-T datasheet, SST39SF020A-55-4I-NHE-T pinout, SST39SF020A-55-4I-NHE-T application, or SST39SF020A-55-4I-NHE-T equivalent, this page provides verified electrical specs, JEDEC-standard x8 interface timing, SuperFlash® reliability metrics, and real-world use context for industrial control, telecom baseband, and legacy BIOS replacement designs.
Technical Context
This device implements Microchip's proprietary SuperFlash® split-gate cell technology, enabling fixed erase/program times independent of cycle count-unlike conventional flash-eliminating software derating over lifetime. 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.
The SST39SF020A-55-4I-NHE-T uses TTL-compatible I/O with tri-state outputs controlled by CE# and OE#, latched address/data buses, and internal VPP generation for write operations. End-of-write detection is implemented via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after the fourth WE#/CE# pulse during programming and sixth pulse during erase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - supports full firmware images for 8-bit MCUs without external banking logic |
| Read Access Time | 55 ns - enables direct execution from flash (XIP) at up to ~14 MHz system clock in wait-state-free configurations |
| Supply Voltage | 4.5V–5.5V - compatible with legacy 5V logic families and eliminates need for dedicated charge pumps |
| Endurance | 100,000 cycles - sufficient for >10 years of daily firmware updates in industrial logging or configuration storage |
| Data Retention | >100 years - validated per JEDEC A103, ensuring long-term reliability in unpowered storage applications |
| Sector Size | 4 Kbyte uniform sectors - allows granular firmware patching without erasing entire application space |
| Byte Program Time | 14 µs typical - reduces update latency vs. parallel-programming alternatives; total chip rewrite takes 4 seconds |
Pinout & Package
32-lead TSOP (Thin Small Outline Package) with 0.5 mm pitch, RoHS-compliant, industrial temperature range (–40°C to +85°C). Pin 1 is NC; Pin 30 is A17 (confirmed for SST39SF020A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A16 = MSB); selects byte location within 256K-word array |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus; tri-stated when CE# or OE# high; latched internally during writes |
| CE# | Chip Enable | Active-low chip select; device enters standby (30 µA) when high; required low for all operations |
| OE# | Output Enable | Active-low output gate; controls data bus drive during reads; high forces high-impedance state |
| WE# | Write Enable | Active-low write control; initiates byte program, sector erase, or chip erase on rising edge of 4th/6th pulse |
| VDD | Power Supply | +4.5V to +5.5V supply; powers core logic and internal VPP generator for erase/program |
| VSS | Ground | Reference ground for all signals and internal circuitry; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash® Technology | Fixed 18 ms sector erase and 70 ms chip erase times across full lifecycle-no software timing adjustments needed |
| Hardware + Software Data Protection | Glitch immunity (<5 ns pulses rejected), VDD power-up/down detection, and JEDEC-standard 6-byte erase/program command lockout |
| End-of-Write Detection | DQ6 Toggle Bit and DQ7 Data# Polling provide deterministic status without polling overhead or timeout assumptions |
| TTL I/O Compatibility | Direct interface with 5V microcontrollers and FPGAs; no level-shifting required for address/data/control lines |
| Uniform Sector Architecture | 64 independent 4-Kbyte sectors enable selective firmware updates while preserving bootloader and calibration data |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
|
Use Scenario: Storing field-upgradable ladder logic and I/O mapping tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with direct bus interface to 8051 or ARM7-based controller; 55 ns access supports real-time scan cycle execution. Use Value: Enables remote firmware patches without hardware replacement; 100-year retention ensures integrity during unplanned plant shutdowns. |
Use Scenario: Holding DSP coefficient tables and protocol stack parameters in voice-over-IP gateways requiring zero-downtime reconfiguration. IC Role / Device Role / Timing Role: Configuration memory mapped into processor address space; sector erase isolates parameter updates from active call processing. Use Value: 4-Kbyte granularity prevents corruption of critical signaling data during simultaneous voice channel updates. |
| Legacy BIOS Replacement | Medical Device Calibration Storage |
|
Use Scenario: Replacing obsolete EPROMs in PC motherboards and embedded x86 systems where socket compatibility and 5V operation are mandatory. IC Role / Device Role / Timing Role: Drop-in x8 memory replacement with identical JEDEC pinout and command set; supports standard BIOS ROM initialization sequence. Use Value: Eliminates UV-eraser dependency and soldering risks; 100,000-cycle endurance exceeds typical BIOS update frequency by 100×. |
Use Scenario: Securing sensor calibration constants and safety-critical diagnostic thresholds in portable ultrasound and infusion pump controllers. IC Role / Device Role / Timing Role: Tamper-resistant nonvolatile storage with hardware write inhibit during power transitions; accessed only during boot or service mode. Use Value: Prevents accidental overwrite during brown-out conditions; >100-year retention meets FDA 21 CFR Part 11 long-term recordkeeping requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020-15JI | 150 ns access time; 3.0V–3.6V supply only; requires external VPP for programming | Not suitable for 5V-only systems; slower timing limits XIP performance in real-time control loops | Select only if migrating to 3.3V design and accepting longer boot times |
| MX29LV200CTTI-70G | 70 ns access; 2.7V–3.6V supply; 128K × 16 organization (dual 8-bit banks) | Requires data bus width adaptation; incompatible pinout and command set; no 5V support | Use only when redesigning for 3.3V and needing wider data path; not a drop-in replacement |
Compared with AT29LV020-15JI and MX29LV200CTTI-70G, the SST39SF020A-55-4I-NHE-T uniquely combines 5V operation, 55 ns speed, JEDEC x8 compatibility, and SuperFlash® fixed-timing reliability-making it the sole option for maintaining legacy 5V embedded systems without PCB or firmware changes.
Availability
SST39SF020A-55-4I-NHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, and legacy BIOS replacement requiring stable component supply across extended product lifecycles.
Supply support for SST39SF020A-55-4I-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 global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on industrial, automotive, and aerospace reliability standards.
The SST39SF020A-55-4I-NHE-T belongs to Microchip's SST39SFx series of Multi-Purpose Flash devices, designed specifically for cost-sensitive, 5V-based embedded systems needing field-upgradable nonvolatile storage with JEDEC-standard compatibility.
FAQ
What is the maximum operating temperature range for the SST39SF020A-55-4I-NHE-T?
The SST39SF020A-55-4I-NHE-T is rated for industrial temperature operation from –40°C to +85°C, as confirmed in Table 5-1 of the official datasheet DS20005022F. This range supports deployment in factory automation, outdoor telecom equipment, and medical devices without thermal derating.
Does the SST39SF020A-55-4I-NHE-T require an external high-voltage supply for programming?
No, the SST39SF020A-55-4I-NHE-T integrates internal VPP generation and operates entirely from a single 4.5V–5.5V supply for both read and write functions. This eliminates external charge pumps or voltage translators, simplifying board design and reducing BOM cost compared to older flash technologies.
How many address lines does the SST39SF020A-55-4I-NHE-T use, and what is the significance of A17?
The SST39SF020A-55-4I-NHE-T uses 17 address lines (A0–A16), with A16 as the most significant bit. Per Table 2-1 and Figure 2-1, Pin 30 is A17 for SST39SF020A-confirming 256K × 8 addressing (217 = 131,072 words × 2 bytes/word = 262,144 bytes = 256K bytes). A17 is physically present but not used as an address line in this variant.
Can the SST39SF020A-55-4I-NHE-T be used as a direct replacement for the SST39SF010A?
No-the SST39SF020A-55-4I-NHE-T is not pin-compatible with the SST39SF010A due to differing address line assignments: Pin 1 is NC for both, but Pin 30 is NC for SST39SF010A and A17 for SST39SF020A. Firmware must be recompiled for the doubled memory size, and hardware verification is required before substitution.
What command sequence initiates sector erase on the SST39SF020A-55-4I-NHE-T?
The sector erase command sequence for SST39SF020A-55-4I-NHE-T is a six-byte load: 5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → SAX/30H (where SAX is the 12-bit sector address). This is defined in Table 4-2 and Figure 7-15 of DS20005022F and requires strict timing compliance.
SST39SF020A-55-4I-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
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (11.43x13.97)
SST39SF020A-55-4I-NHE-T FAQ
1.How can I place an order for SST39SF020A-55-4I-NHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-55-4I-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 SST39SF020A-55-4I-NHE-T reliable?
The price and inventory of SST39SF020A-55-4I-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 SST39SF020A-55-4I-NHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF020A-55-4I-NHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-55-4I-NHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-55-4I-NHE-T?
SST39SF020A-55-4I-NHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-55-4I-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 SST39SF020A-55-4I-NHE-T?
For technical support, including SST39SF020A-55-4I-NHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-55-4I-NHE-T requirements.
6.How does Aetrix verify that SST39SF020A-55-4I-NHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-55-4I-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 SST39SF020A-55-4I-NHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF020A-55-4I-NHE-T?
All SST39SF020A-55-4I-NHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-55-4I-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 SST39SF020A-55-4I-NHE-T part is unused and in its original packaging.
Return procedure for SST39SF020A-55-4I-NHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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