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Microchip Technology SST39SF020A-70-4C-WHE
- Part No.:
- SST39SF020A-70-4C-WHE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF020A-70-4C-WHE.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:367
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Product details
Overview
SST39SF020A-70-4C-WHE from Microchip Technology is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with 70 ns read access time, single 4.5–5.5 V supply operation, and uniform 4 KB sector-erase architecture. It implements SST's SuperFlash technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39SF020A-70-4C-WHE datasheet, SST39SF020A-70-4C-WHE pinout, SST39SF020A-70-4C-WHE application, or SST39SF020A-70-4C-WHE equivalent, key selection considerations include JEDEC-standard x8 parallel interface timing, hardware/software data protection, TTL I/O compatibility, and 32-pin PLCC package suitability for legacy industrial control PCBs.
Technical Context
This device operates as a nonvolatile parallel-interface flash memory with asynchronous read and byte-program capability. Its SuperFlash split-gate cell architecture enables fixed 14 µs typical byte-program time and 18 ms typical sector-erase time-both independent of accumulated program/erase cycles-eliminating software de-rating over lifetime.
Command execution relies on standard microprocessor write sequences using CE#, OE#, and WE# control lines. End-of-write detection uses either Data# Polling (DQ7) or Toggle Bit (DQ6), and software data protection requires verified three-byte (program) or six-byte (erase) command sequences per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), directly maps to 256 KB of firmware or parameter storage space |
| Read Access Time | 70 ns maximum - supports CPU bus speeds up to ~12 MHz without wait states |
| Supply Voltage | 4.5–5.5 V - compatible with legacy 5 V logic systems without level-shifting |
| Endurance | 100,000 program/erase cycles - sufficient for >10 years of daily field firmware updates |
| Data Retention | Greater than 100 years - ensures long-term reliability in unpowered storage |
| Byte-Program Time | 14 µs typical - enables rapid patch-level updates without system interruption |
| Sector Size | Uniform 4 KB sectors - simplifies partitioning for bootloader, app, and config regions |
Pinout & Package
Package: 32-lead PLCC (Plastic Leaded Chip Carrier), RoHS compliant, 1.27 mm pitch, surface-mountable with through-hole rework compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 256K × 8 addressing; A16 is MSB for this density |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus with tri-state output 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 |
| WE# | Write Enable | Active-low control for program/erase command latching and internal timing initiation |
| VDD | Power Supply | 4.5–5.5 V main supply; internal VPP generation eliminates external high-voltage circuitry |
| VSS | Ground | Reference ground for all I/O and core logic |
| NC | No Connection | Pins 13 and 31 are unconnected; must be left floating or tied to ground per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick oxide tunneling injector delivers 100× better endurance vs. conventional flash |
| Fixed Erase/Program Timing | 18 ms sector-erase and 14 µs byte-program times remain constant across full lifecycle |
| JEDEC-Compliant Interface | Standard x8 pinout and command set enable drop-in replacement for other JEDEC flash devices |
| Hardware + Software Protection | Glitch immunity (<5 ns), VDD power-up detection, and mandatory 3-/6-byte command sequences prevent accidental writes |
| Latched Address/Data | Internal latching on WE#/CE# edges eliminates need for external address/data latches in microcontroller designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers with field update capability. IC Role / Device Role / Timing Role: Nonvolatile parallel boot memory accessed at power-on reset via 8-bit data bus and 17-bit address bus. Use Value: 70 ns read access enables direct execution from flash (XIP) on 8/16-bit MCUs; 100,000-cycle endurance supports quarterly firmware patches over 10+ year product life. | Use Scenario: Holding calibration coefficients, safety-critical device settings, and regulatory audit logs in FDA-cleared diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration store with software data protection preventing unauthorized parameter modification. Use Value: Hardware write inhibit during power-up/down plus mandatory 6-byte erase commands ensure zero unintended config changes under brown-out conditions. |
| Automotive Body Control Module | Legacy Networking Equipment Bootloader |
Use Scenario: Storing lighting control algorithms and CAN node configuration in automotive BCMs operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade (4C) flash memory providing guaranteed operation over extended temperature range. Use Value: Greater than 100-year data retention ensures calibration data integrity across vehicle lifetime without battery backup. | Use Scenario: Hosting boot code and FPGA bitstreams in enterprise switches/routers where field upgrades occur infrequently but must be highly reliable. IC Role / Device Role / Timing Role: Primary boot memory mapped into CPU address space with sector-erase enabling independent firmware and bitstream updates. Use Value: Uniform 4 KB sectors allow isolated erasure of bootloader region without corrupting application firmware stored in adjacent sectors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-70EC | 4 Mbit (512K × 8), 70 ns access, 3.0 V core (3.0–3.6 V), requires external VPP for programming | Higher density but lower voltage; not pin-compatible due to different VPP pin requirement and address count | Select only if migrating to 3.3 V systems and requiring 4 Mbit capacity; redesign required for VPP routing and address decoding |
| MX29LV040CTTI-70G | 4 Mbit (512K × 8), 70 ns, 3.0 V supply, no VPP needed, JEDEC-compliant but different command set timing | Same package but incompatible software protocol; lacks Toggle Bit status reporting | Use only with updated driver firmware; not suitable for drop-in replacement in existing SST39SF020A-based designs |
Compared with AM29LV040B-70EC and MX29LV040CTTI-70G, the SST39SF020A-70-4C-WHE provides native 5 V operation, integrated VPP generation, and deterministic Toggle Bit/DQ7 status reporting-reducing BOM count and simplifying firmware polling logic in legacy 5 V embedded systems.
Availability
SST39SF020A-70-4C-WHE is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, automotive body electronics, and legacy networking equipment requiring stable component supply and long-term obsolescence management.
Supply support for SST39SF020A-70-4C-WHE 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 semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST39SF020A-70-4C-WHE belongs to Microchip's SST39SFx family of Multi-Purpose Flash devices, designed specifically for cost-sensitive, 5 V-based embedded systems needing field-upgradable firmware storage with high endurance and long data retention.
FAQ
What is the maximum operating temperature range for the SST39SF020A-70-4C-WHE?
The SST39SF020A-70-4C-WHE is rated for industrial temperature operation from -40°C to +85°C, as indicated by the "4C" suffix in the part number. This makes it suitable for deployment in harsh environments such as factory automation controllers and automotive under-hood modules where ambient thermal stress exceeds commercial grade limits.
Does the SST39SF020A-70-4C-WHE require an external high-voltage supply for programming?
No, the SST39SF020A-70-4C-WHE does not require an external high-voltage supply. It features internal VPP generation and performs all program and erase operations using only the standard 4.5–5.5 V VDD supply. This eliminates the need for dedicated VPP circuitry and simplifies board design compared to older flash families.
How many address lines does the SST39SF020A-70-4C-WHE use, and what is the MSB pin?
The SST39SF020A-70-4C-WHE uses 17 address lines (A0–A16). A16 is the most significant bit for its 256K × 8 organization. This is confirmed in the datasheet's pin description table and functional block diagram, where AMS = A16 applies specifically to the SST39SF020A variant.
Can the SST39SF020A-70-4C-WHE be used as a direct replacement for the SST39SF010A in an existing design?
No, the SST39SF020A-70-4C-WHE is not a direct replacement for the SST39SF010A. While both share identical pinouts and command sets, the SST39SF020A adds A16 and requires correct decoding of the 17th address line. Using it in a 128K × 8 design without A16 connection may result in unintended address aliasing or incomplete memory access.
What methods does the SST39SF020A-70-4C-WHE provide to detect completion of a byte-program operation?
The SST39SF020A-70-4C-WHE provides two hardware-supported status detection methods: Data# Polling (monitoring DQ7) and Toggle Bit (monitoring DQ6). Both become valid after the rising edge of the fourth WE# or CE# pulse and allow the host processor to poll asynchronously without fixed timing delays-enabling efficient use of CPU cycles during internal programming.
SST39SF020A-70-4C-WHE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF020A-70-4C-WHE FAQ
1.How can I place an order for SST39SF020A-70-4C-WHE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-70-4C-WHE 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-70-4C-WHE reliable?
The price and inventory of SST39SF020A-70-4C-WHE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST39SF020A-70-4C-WHE is usually 5 days.
3.What payment methods are accepted for SST39SF020A-70-4C-WHE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-70-4C-WHE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-70-4C-WHE?
SST39SF020A-70-4C-WHE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-70-4C-WHE 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-70-4C-WHE?
For technical support, including SST39SF020A-70-4C-WHE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-70-4C-WHE requirements.
6.How does Aetrix verify that SST39SF020A-70-4C-WHE is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-70-4C-WHE 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-70-4C-WHE meets industry standards.
7.What is the process for return or replacement of SST39SF020A-70-4C-WHE?
All SST39SF020A-70-4C-WHE units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-70-4C-WHE, 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-70-4C-WHE part is unused and in its original packaging.
Return procedure for SST39SF020A-70-4C-WHE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF020A-70-4C-WHE Tags
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