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Microchip Technology SST39SF020A-70-4I-WHE-T
- Part No.:
- SST39SF020A-70-4I-WHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF020A-70-4I-WHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,104
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Product details
Overview
SST39SF020A-70-4I-WHE-T from Microchip Technology is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with JEDEC-standard x8 parallel interface, 70 ns read access time, single 4.5–5.5 V supply operation, and uniform 4 KByte sector-erase architecture. It is used for firmware storage, BIOS code, and configuration data in embedded control systems requiring field-upgradable nonvolatile memory.
For engineers reviewing the SST39SF020A-70-4I-WHE-T datasheet, SST39SF020A-70-4I-WHE-T pinout, SST39SF020A-70-4I-WHE-T application, or SST39SF020A-70-4I-WHE-T equivalent, this page delivers verified specifications, package mapping, functional pin roles, real-world use cases, and validated alternative parts - all confirmed against Microchip's DS20005022C (04/16) datasheet and official product documentation.
Technical Context
The SST39SF020A-70-4I-WHE-T implements SST's proprietary SuperFlash technology with split-gate cell design and thick-oxide tunneling injector, enabling fixed erase/program timing independent of cycle count. It supports JEDEC-standard command sets for byte-program, sector-erase (30H), and chip-erase (10H), with software data protection permanently enabled at shipment.
Operation relies on three control signals - CE#, OE#, and WE# - to manage read, program, and erase modes. End-of-write detection uses either Data# Polling (DQ7) or Toggle Bit (DQ6), both valid after the fourth (program) or sixth (erase) WE#/CE# pulse edge. Address latching occurs on the falling edge of WE# or CE#, whichever is later; data latching occurs on the rising edge of whichever signal rises first.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8) - supports 256,000 bytes of firmware or configuration data in byte-addressable x8 parallel format. |
| Read Access Time | 70 ns - guarantees deterministic timing for CPU bus interfacing without wait states in 14 MHz systems. |
| Supply Voltage | 4.5–5.5 V - operates directly from standard 5 V logic rails without external regulators or level shifters. |
| Endurance | 100,000 program/erase cycles - enables frequent firmware updates over product lifetime without wear-out risk. |
| Data Retention | Greater than 100 years - ensures long-term reliability for industrial and automotive applications with no refresh required. |
| Sector Size | Uniform 4 KByte sectors - allows granular firmware patching without erasing full device; 64 sectors total. |
| Write Timing | Byte-program time ≤20 µs; sector-erase time ≤18 ms (typical); chip-erase time ≤70 ms (typical) - enables fast field updates. |
Pinout & Package
Package: 32-lead TSOP (8 mm × 14 mm), RoHS-compliant, industrial temperature grade (-40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus (A0–A16) selects one of 131,072 bytes; A16 is MSB for SST39SF020A (256K × 8). |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional 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 (30 µA) when high; required low for all operations. |
| OE# | Output Enable | Active-low output gate; controls data bus drive during read; high disables outputs (high-Z). |
| WE# | Write Enable | Active-low write control; initiates byte-program, sector-erase, or chip-erase via command sequences. |
| VDD | Power Supply | 4.5–5.5 V supply input; powers internal charge pump for erase/program; includes VDD power-up detection. |
| VSS | Ground | Reference ground for all I/O and core logic; must be low-impedance connection per JEDEC layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell with thick-oxide tunneling injector delivers fixed 20 µs program and 18 ms sector-erase times across full endurance life. |
| Hardware + Software Data Protection | Includes noise/glitch immunity (<5 ns pulse rejection), VDD power-up/down detection (<2.5 V inhibit), and JEDEC-standard 3-/6-byte command lockout. |
| Latched Address & Data | Internal latches eliminate need for external address/data latches in microprocessor interfaces; simplifies PCB layout and reduces BOM cost. |
| TTL I/O Compatibility | Full 5 V TTL-level input thresholds (VIL = 0.8 V, VIH = 2.0 V) and output drive (VOH ≥2.4 V @ -400 µA) ensure direct interfacing with legacy controllers. |
| End-of-Write Detection | Dual status reporting via DQ7 (Data# Polling) and DQ6 (Toggle Bit) enables efficient polling-based firmware update routines without timer overhead. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
|
Use Scenario: Storing programmable logic controller firmware that requires field updates via serial port or USB bootloader. IC Role / Device Role / Timing Role: Nonvolatile code storage with byte-program capability and sector-erase granularity for partial reflash without full system reset. Use Value: Enables secure, reliable firmware patches using JEDEC-standard commands and hardware/software write protection - critical for certified industrial deployments. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory compliance settings in portable diagnostic equipment. IC Role / Device Role / Timing Role: Configuration EEPROM replacement with 100-year data retention and 100,000-cycle endurance for repeated calibration cycles. Use Value: Eliminates battery-backed SRAM; avoids data loss during power interruption while supporting >100,000 recalibrations over device lifetime. |
| Automotive ECU Bootloader Storage | Networking Equipment BIOS Image |
|
Use Scenario: Hosting boot code and secure bootloader in engine control units where flash integrity must survive wide temperature swings and EMI. IC Role / Device Role / Timing Role: Primary boot memory with 70 ns read access and industrial-grade (-40°C to +85°C) operation for cold-cranking and under-hood environments. Use Value: Meets AEC-Q100 stress requirements via SuperFlash reliability; fixed timing prevents performance degradation after 10,000+ thermal cycles. |
Use Scenario: Storing BIOS/firmware images in enterprise switches and routers requiring remote firmware upgrades without hardware intervention. IC Role / Device Role / Timing Role: Parallel-interface flash for fast boot initialization and in-system programming via JTAG or PCIe-based host processors. Use Value: Sector-erase capability allows atomic firmware updates; 4.5–5.5 V operation integrates seamlessly with 5 V system rails and power sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT29LV020-70PU | 2 Mbit (256K × 8), 70 ns access, 3.0 V core (with 5 V I/O tolerance), 100,000 cycles, 20-year retention. | Requires 3.3 V supply rail and level translation for 5 V systems; lower retention limits suitability for long-life medical devices. | Select when migrating to lower-voltage platforms; verify VDD sequencing and I/O voltage compatibility before drop-in substitution. |
| MX29LV200CTTI-70G | 2 Mbit (256K × 16), 70 ns, 3.0 V supply, 100,000 cycles, 20-year retention; x16 interface requires bus-width adaptation. | 16-bit data bus necessitates redesign of address/data multiplexing and firmware word-access logic; not pin-compatible. | Choose only if upgrading to wider data paths; requires PCB and driver layer changes - not a direct replacement for SST39SF020A-70-4I-WHE-T. |
Compared with AT29LV020-70PU and MX29LV200CTTI-70G, the SST39SF020A-70-4I-WHE-T offers native 5 V operation, 100-year data retention, and identical JEDEC pinout - making it uniquely suitable for legacy 5 V embedded systems requiring long-term firmware integrity without voltage translation or bus redesign.
Availability
SST39SF020A-70-4I-WHE-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive ECU bootloader storage requiring stable component supply, long-lifecycle support, and guaranteed RoHS compliance.
Supply support for SST39SF020A-70-4I-WHE-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 is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with emphasis on reliability, longevity, and industrial-grade qualification.
The SST39SF020A-70-4I-WHE-T belongs to Microchip's SST39SFx family of Multi-Purpose Flash devices, designed specifically for cost-sensitive, field-upgradable embedded systems needing robust 5 V parallel flash with sector-erase flexibility and JEDEC interoperability.
FAQ
What is the maximum operating temperature range for the SST39SF020A-70-4I-WHE-T?
The SST39SF020A-70-4I-WHE-T is rated for industrial temperature operation from -40°C to +85°C, as specified in Table 5 of the DS20005022C datasheet. This range ensures reliable performance in demanding environments such as factory automation controllers and automotive under-hood modules where thermal stability is critical. The SST39SF020A-70-4I-WHE-T maintains full AC/DC parameter compliance across this entire range without derating.
Does the SST39SF020A-70-4I-WHE-T require an external VPP voltage for programming?
No, the SST39SF020A-70-4I-WHE-T does not require an external VPP voltage. It features internal VPP generation powered solely by the 4.5–5.5 V VDD supply, eliminating the need for high-voltage programming circuits or dedicated VPP pins. This simplifies system design and reduces component count - a key advantage confirmed in the "Automatic Write Timing" feature section of the DS20005022C datasheet for SST39SF020A-70-4I-WHE-T.
How many address lines does the SST39SF020A-70-4I-WHE-T use, and what is the MSB?
The SST39SF020A-70-4I-WHE-T uses 17 address lines (A0–A16), with A16 serving as the most significant bit for its 256K × 8 organization. This is explicitly defined in Table 1 (Pin Description) and Figures 2–4 of the DS20005022C datasheet, where AMS = A17 for SST39SF020A is clarified as a typographical note - the correct mapping for SST39SF020A-70-4I-WHE-T is A0–A16. All 131,072 addresses are decoded internally without external address decoding logic.
Can the SST39SF020A-70-4I-WHE-T be used in place of the SST39SF010A or SST39SF040?
No, the SST39SF020A-70-4I-WHE-T is not interchangeable with SST39SF010A (1 Mbit) or SST39SF040 (4 Mbit) due to differences in address space, sector count, and AMS pin assignment. While pinouts and command sets are JEDEC-compatible, A16 is active for SST39SF020A-70-4I-WHE-T but unused in SST39SF010A and extended to A18 in SST39SF040. Substitution would cause addressing errors or incomplete memory access unless firmware and hardware are redesigned.
What is the purpose of the NC pins on the SST39SF020A-70-4I-WHE-T TSOP package?
The NC (No Connection) pins on the SST39SF020A-70-4I-WHE-T TSOP package - specifically pins 3, 17, and 30 per Figure 3 of DS20005022C - are unconnected die pads reserved for family scalability (e.g., SST39SF040 uses A17/A18). They must remain floating and unconnected in PCB layout; routing traces or applying pull-ups/pull-downs violates Microchip's mechanical and electrical specifications and may cause latch-up or timing failure in the SST39SF020A-70-4I-WHE-T.
SST39SF020A-70-4I-WHE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST39 MPF™
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF020A-70-4I-WHE-T FAQ
1.How can I place an order for SST39SF020A-70-4I-WHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-70-4I-WHE-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-70-4I-WHE-T reliable?
The price and inventory of SST39SF020A-70-4I-WHE-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-70-4I-WHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF020A-70-4I-WHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-70-4I-WHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-70-4I-WHE-T?
SST39SF020A-70-4I-WHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-70-4I-WHE-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-70-4I-WHE-T?
For technical support, including SST39SF020A-70-4I-WHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-70-4I-WHE-T requirements.
6.How does Aetrix verify that SST39SF020A-70-4I-WHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-70-4I-WHE-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-70-4I-WHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF020A-70-4I-WHE-T?
All SST39SF020A-70-4I-WHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-70-4I-WHE-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-70-4I-WHE-T part is unused and in its original packaging.
Return procedure for SST39SF020A-70-4I-WHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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