My Inquiry
My Account
Microchip Technology SST39SF020A-70-4C-WHE-T
- Part No.:
- SST39SF020A-70-4C-WHE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
SST39SF020A-70-4C-WHE-T.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,638
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SST39SF020A-70-4C-WHE-T from Microchip Technology is a 2 Mbit (256K × 8) CMOS Multi-Purpose Flash memory IC with single 4.5–5.5V supply operation, 70 ns read access time, and uniform 4 KByte sector-erase architecture. It implements SuperFlash split-gate technology for high reliability in embedded firmware storage applications requiring field-upgradable code or configuration data.
For engineers reviewing the SST39SF020A-70-4C-WHE-T datasheet, SST39SF020A-70-4C-WHE-T pinout, SST39SF020A-70-4C-WHE-T application, or SST39SF020A-70-4C-WHE-T equivalent, this page delivers verified technical context, JEDEC-compliant x8 interface timing, endurance and retention specs, PLCC-32 package details, and real-world use-value analysis for industrial control, networking boot memory, and legacy system replacement designs.
Technical Context
This device belongs to the SST39SFxxxA family of parallel-interface flash memories using proprietary SuperFlash technology-featuring split-gate cells and thick-oxide tunneling injectors for superior endurance and data retention. It operates exclusively in 5V-only mode with no VPP pin required, as internal charge pumps generate programming/erase voltages.
Command execution follows JEDEC-standard x8 flash protocols: Byte-Program requires a three-byte software unlock sequence (5555H/AAH → 2AAAH/55H → 5555H/A0H), while Sector-Erase and Chip-Erase use six-byte sequences. End-of-write detection is supported via Data# Polling (DQ7) and Toggle Bit (DQ6), both valid after defined WE#/CE# edge counts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), enabling full BIOS/firmware images for 8-bit and 16-bit microcontrollers without external address multiplexing. |
| Read Access Time | 70 ns maximum - supports direct connection to 14 MHz bus systems with no wait states in standard timing modes. |
| Endurance | 100,000 program/erase cycles - sufficient for >10 years of daily firmware updates in industrial logging or configuration storage. |
| Data Retention | Greater than 100 years at 25°C - ensures long-term integrity of calibration tables or security keys in unpowered equipment. |
| Supply Voltage | 4.5–5.5V only - eliminates need for dual-voltage rails or external VPP generators, simplifying power design. |
| Sector Size | Uniform 4 KByte sectors - enables granular firmware patching and secure over-the-air update partitioning. |
| Write Timing | Byte-Program: 14 µs typical; Sector-Erase: 18 ms typical - allows rapid field reprogramming without host CPU blocking. |
Pinout & Package
Package: 32-lead Plastic Leaded Chip Carrier (PLCC), RoHS compliant, 1.27 mm pitch, body size 11.43 mm × 11.43 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 256K × 8 addressing (17-bit range); A16 is MSB - matches standard 8051/8086-style parallel bus mapping. |
| DQ0–DQ7 | Data I/O | Bidirectional 8-bit data bus; latched internally during writes; tri-stated when CE# or OE# is high. |
| CE# | Chip Enable | Active-low chip select - enables device for read/write; high state forces standby current ≤30 µA. |
| OE# | Output Enable | Active-low output gate - controls DQ bus drive without affecting internal state; used for read timing control. |
| WE# | Write Enable | Active-low write strobe - initiates byte-program, sector-erase, or chip-erase command latching on rising edge. |
| VDD | Power Supply | +4.5V to +5.5V main supply - powers all logic and internal charge pump; no separate VPP required. |
| VSS | Ground | Reference return path for all signals and internal circuitry; must be low-impedance for noise immunity. |
| NC | No Connect | Pins 17, 20, and 31 are unconnected - must remain floating per datasheet; not usable for routing or grounding. |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell structure provides fixed erase/program times independent of cycle count - eliminates software de-rating over lifetime. |
| Hardware + Software Data Protection | Glitch protection (<5 ns pulse rejection), VDD power-up/down detection, and mandatory 3-/6-byte unlock sequences prevent accidental writes. |
| TTL I/O Compatibility | Direct interface with 5V microcontrollers and FPGAs - no level shifters needed; VIH = 2.0V min, VOL = 0.4V max at 2.1 mA. |
| JEDEC Standard Pinout & Command Set | Drop-in replacement for industry-standard 28Fxxx, 29Fxxx, and AM29Fxxx families - simplifies legacy board upgrades. |
| Latched Address & Data | Internal latching on falling CE#/WE# edges eliminates need for external address/data latches in simple controller designs. |
Applications
| Industrial PLC Firmware Storage | Legacy Networking Equipment Boot Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with 70 ns read access, supporting direct execution from flash (XIP) in 8051-based control engines. Use Value: 100-year data retention ensures firmware integrity across equipment lifetimes; sector-erase enables safe field updates without full reflash downtime. |
Use Scenario: Holding boot code and initialization routines for Ethernet switches and routers based on older MIPS or PowerPC processors. IC Role / Device Role / Timing Role: Parallel x8 boot ROM interfaced to 16-bit address/data buses; CE#/OE# timing compatible with legacy ASIC boot controllers. Use Value: JEDEC pinout compatibility allows direct replacement of obsolete 28F020 or 29F020 devices; 4.5–5.5V operation matches existing 5V system rails. |
| Medical Device Configuration Memory | Automotive Diagnostic Module Code Storage |
Use Scenario: Storing calibrated sensor offsets, user preferences, and regulatory compliance settings in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: Secure nonvolatile parameter storage with hardware/software write protection preventing corruption during power transitions. Use Value: 100,000-cycle endurance supports frequent recalibration events; RoHS-compliant PLCC package meets medical safety and reflow requirements. |
Use Scenario: Hosting diagnostic firmware and protocol stacks (e.g., ISO 9141, UDS) in OBD-II scan tools and ECU reflashing adapters. IC Role / Device Role / Timing Role: Field-upgradable flash memory accessed via 8-bit microcontroller parallel bus during vehicle service operations. Use Value: Fast 14 µs byte-program enables rapid firmware patches; Toggle Bit/DQ7 polling simplifies host-side write completion detection without timers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29F020B-70JC | Same 2 Mbit x8 density, 70 ns access, PLCC-32; requires external VPP = 12V for programming; no internal charge pump. | Needs additional high-voltage generation circuitry; less suitable for compact or low-cost designs lacking VPP capability. | Select if legacy board already includes VPP support and JEDEC command compatibility is critical; avoid if redesigning for simplified power. |
| SST39VF200A-70-4C-B3K | 3V-only variant (2.7–3.6V), same SuperFlash core, 70 ns access, TSOP-48 package; incompatible voltage domain and pinout. | Requires full PCB redesign for 3V systems; not drop-in replaceable due to different package and supply requirements. | Choose only for new 3V designs prioritizing lower power; not viable for 5V SST39SF020A-70-4C-WHE-T replacement. |
Compared with AM29F020B-70JC and SST39VF200A-70-4C-B3K, the SST39SF020A-70-4C-WHE-T uniquely combines 5V-only operation with integrated VPP generation and PLCC-32 JEDEC pinout - delivering lowest system-level BOM cost and highest compatibility for retrofitting legacy 5V embedded systems.
Availability
SST39SF020A-70-4C-WHE-T is available at Aetrix Electronics and suitable for industrial control firmware storage, networking boot memory, and medical device configuration applications requiring stable component supply and long-term lifecycle support.
Supply support for SST39SF020A-70-4C-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 components, and memory solutions, with a focus on robust, long-lifecycle products for industrial and automotive markets.
The SST39SFxxxA product line was designed specifically for cost-sensitive, 5V-based embedded systems needing reliable, field-upgradable nonvolatile memory - emphasizing JEDEC compatibility, ease of integration, and extended data retention without complex voltage management.
FAQ
What is the operating temperature range for SST39SF020A-70-4C-WHE-T?
The SST39SF020A-70-4C-WHE-T is rated for commercial temperature operation from 0°C to +70°C. Its internal design supports stable performance across this range without derating, making it suitable for office equipment, consumer electronics, and non-critical industrial enclosures where ambient conditions remain within specification.
Does SST39SF020A-70-4C-WHE-T require an external VPP voltage for programming?
No, the SST39SF020A-70-4C-WHE-T does not require an external VPP voltage. It uses internal charge pump circuitry to generate the high voltage needed for programming and erasing, operating solely from the 4.5–5.5V VDD supply - eliminating the need for external high-voltage circuitry and simplifying system design.
How is write completion detected on SST39SF020A-70-4C-WHE-T?
Write completion on SST39SF020A-70-4C-WHE-T is detected using either Data# Polling (monitoring DQ7) or Toggle Bit (monitoring DQ6). Both methods become valid after the rising edge of the fourth WE# or CE# pulse for byte-program, or sixth pulse for erase operations - enabling efficient host polling without fixed delay loops.
Is SST39SF020A-70-4C-WHE-T pin-compatible with older 28F020 or 29F020 devices?
Yes, SST39SF020A-70-4C-WHE-T uses JEDEC-standard x8 flash pinouts and command sets, making it functionally and physically pin-compatible with 28F020 and 29F020 in PLCC-32 packages. However, verify timing margins and software unlock sequences, as SST39SF020A-70-4C-WHE-T uses SuperFlash-specific command flow.
What package type is used for SST39SF020A-70-4C-WHE-T?
SST39SF020A-70-4C-WHE-T is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package, RoHS compliant, with standard 1.27 mm lead pitch and 11.43 mm × 11.43 mm body dimensions - compatible with standard PLCC sockets and reflow soldering profiles for through-hole or surface-mount assembly.
SST39SF020A-70-4C-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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
SST39SF020A-70-4C-WHE-T FAQ
1.How can I place an order for SST39SF020A-70-4C-WHE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST39SF020A-70-4C-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-70-4C-WHE-T reliable?
The price and inventory of SST39SF020A-70-4C-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-70-4C-WHE-T is usually 5 days.
3.What payment methods are accepted for SST39SF020A-70-4C-WHE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST39SF020A-70-4C-WHE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST39SF020A-70-4C-WHE-T?
SST39SF020A-70-4C-WHE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST39SF020A-70-4C-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-70-4C-WHE-T?
For technical support, including SST39SF020A-70-4C-WHE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST39SF020A-70-4C-WHE-T requirements.
6.How does Aetrix verify that SST39SF020A-70-4C-WHE-T is sourced from the original manufacturer or authorized distributors?
All SST39SF020A-70-4C-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-70-4C-WHE-T meets industry standards.
7.What is the process for return or replacement of SST39SF020A-70-4C-WHE-T?
All SST39SF020A-70-4C-WHE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST39SF020A-70-4C-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-70-4C-WHE-T part is unused and in its original packaging.
Return procedure for SST39SF020A-70-4C-WHE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SST39SF020A-70-4C-WHE-T Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
