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Microchip Technology SST25LF020A-33-4C-QAE-T
- Part No.:
- SST25LF020A-33-4C-QAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25LF020A-33-4C-QAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 33MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,301
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Product details
Overview
SST25LF020A-33-4C-QAE-T from Microchip Technology is a 2 Mbit SPI serial flash memory IC operating at 3.0–3.6 V, supporting up to 33 MHz high-speed read, with 4 KByte uniform sectors and 32 KByte overlay blocks. It features Auto Address Increment (AAI) programming, software/hardware write protection (WP# and HOLD#), and delivers 100,000 program/erase cycles with >100 years data retention - used in firmware storage for embedded microcontrollers and boot code in industrial control modules.
For engineers reviewing the SST25LF020A-33-4C-QAE-T datasheet, SST25LF020A-33-4C-QAE-T pinout, SST25LF020A-33-4C-QAE-T application, or SST25LF020A-33-4C-QAE-T equivalent, key selection considerations include its 8-pin SOIC 150-mil package, SPI Mode 0/3 compatibility, 7 mA active read current, 8 µA standby current, and commercial temperature range (0°C to +70°C).
Technical Context
The SST25LF020A-33-4C-QAE-T implements a four-wire SPI interface (SCK, SI, SO, CE#) with dual-mode clock polarity support (Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve faster erase/program times and superior endurance versus conventional NOR flash.
It integrates dedicated control pins - WP# for status register lock-down and HOLD# for pausing ongoing serial transfers without deselecting the device - and supports both byte-program and AAI programming modes, where AAI reduces total programming time by eliminating repeated address transmission across sequential bytes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8-bit), organized as 64 uniform 4 KByte sectors |
| Max Clock Frequency | 33 MHz for High-Speed Read (0BH command), enabling 33 MB/s peak throughput |
| Supply Voltage | 3.0–3.6 V single supply - eliminates need for level shifters in 3.3 V systems |
| Endurance | 100,000 program/erase cycles per sector - supports frequent firmware updates in field-deployed devices |
| Data Retention | Greater than 100 years at +25°C - ensures long-term reliability in unattended applications |
| Active Read Current | 7 mA typical at 33 MHz - enables low-power operation during boot code fetch |
| Standby Current | 8 µA typical - minimizes quiescent power in sleep-mode systems |
Pinout & Package
Package: 8-lead SOIC, 150 mil body width (SA package), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low chip select; must remain low throughout any instruction sequence to maintain device engagement |
| SO | Serial Data Output | Tri-state output; drives data on falling edge of SCK in both Mode 0 and Mode 3 |
| WP# | Write Protect | Hardware-enables lock-down of Block-Protection bits (BP1/BP0/BPL) when pulled low |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 3.0–3.6 V input; decoupling capacitor (0.1 µF) recommended adjacent to pin |
| HOLD# | Hold Control | Pauses ongoing SPI transfer without resetting internal state; requires synchronization with SCK low period |
| SCK | Serial Clock | Timing reference; rising edge latches input (SI), falling edge outputs data (SO) |
| SI | Serial Data Input | Command/address/data input; sampled on rising edge of SCK |
Key Features
| Feature | Design Value |
|---|---|
| SuperFlash Technology | Split-gate cell architecture enables 18 ms sector erase (vs. >100 ms in standard NOR), reducing firmware update latency |
| Auto Address Increment (AAI) | Eliminates retransmission of address for each byte in sequential programming - cuts full-array programming time by ~40% |
| Dual SPI Mode Support | Native compatibility with both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) simplifies integration with ARM Cortex-M, PIC, and FPGA hosts |
| Flexible Block Protection | Software-configurable BP1/BP0 bits protect 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of bootloader or calibration data |
| HOLD# Functionality | Enables multi-master arbitration or CPU context switching without interrupting flash transaction state - critical for real-time OS environments |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Stores firmware images and configuration parameters in programmable logic controllers deployed in factory automation lines with ambient temperatures up to +70°C. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 33 MHz read access to startup code for ARM-based controller SoCs. Use Value: 100-year data retention ensures firmware integrity over equipment lifetime without battery backup or refresh cycles. |
Use Scenario: Holds certified boot loader and safety-critical diagnostic routines in portable ultrasound and infusion pump systems requiring IEC 62304 compliance. IC Role / Device Role / Timing Role: Secure, write-protected SPI flash storing immutable boot code verified at power-on reset. Use Value: Hardware WP# + software BPL bit enable permanent lock-down of bootloader region, preventing unauthorized modification. |
| Smart Energy Meter Calibration Data | Automotive Body Control Module (BCM) Configuration |
Use Scenario: Stores metrology calibration coefficients and tariff tables in ANSI C12.20-certified electricity meters exposed to wide thermal cycling (-20°C to +70°C). IC Role / Device Role / Timing Role: High-reliability serial flash retaining precision calibration values across 20+ year service life. Use Value: 100,000-cycle endurance supports field recalibration via secure OTA updates without wear-out risk. |
Use Scenario: Stores vehicle-specific configuration maps (e.g., door lock timing, lighting profiles) in BCMs operating across automotive extended temperature range (-20°C to +85°C). IC Role / Device Role / Timing Role: SPI-connected non-volatile memory interfacing directly with Infineon AURIX TC3xx MCU via hardware QSPI peripheral. Use Value: HOLD# pin allows seamless interruption of flash reads during CAN bus interrupt servicing - avoids timing jitter in real-time control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST25VF020B-70-4C-QAE | Successor part with 70 MHz max clock, improved 100K-cycle endurance, and same 2 Mbit density/package | Supports higher-speed boot loading in performance-critical designs; pin-compatible but not drop-in due to timing parameter changes | Select when new designs require faster read throughput or extended lifecycle; SST25LF020A-33-4C-QAE-T remains valid for legacy replacement |
| AT25DF021-SSH-T | 2 Mbit SPI flash from Microchip (Atmel), 85 MHz max clock, 100K cycles, same SOIC-8 package, but uses different status register layout and command set | Requires firmware driver modification for write protection and erase commands; no HOLD# pin support | Choose only if migrating to Atmel-compatible ecosystem; not suitable for direct substitution without validation |
Compared with SST25LF020A-33-4C-QAE-T, SST25VF020B offers higher speed and identical footprint for future-proofing, while AT25DF021 demands driver-level changes and lacks HOLD# - making SST25LF020A-33-4C-QAE-T optimal for cost-sensitive, timing-stable legacy upgrades where hold functionality is essential.
Availability
SST25LF020A-33-4C-QAE-T is available at Aetrix Electronics and suitable for industrial control firmware storage, medical device boot code retention, smart meter calibration data archiving, and automotive BCM configuration requiring stable component supply across extended product lifecycles.
Supply support for SST25LF020A-33-4C-QAE-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 delivering microcontrollers, analog, FPGA, and memory solutions with emphasis on reliability, longevity, and embedded system integration.
The SST25LF020A-33-4C-QAE-T belongs to Microchip's legacy SST serial flash product line, designed specifically for cost-effective, low-pin-count non-volatile storage in resource-constrained embedded systems requiring robustness over decades of operation.
FAQ
What is the maximum operating frequency of the SST25LF020A-33-4C-QAE-T?
The SST25LF020A-33-4C-QAE-T supports up to 33 MHz for High-Speed Read operations using the 0BH command. Standard Read (03H) is rated at 20 MHz. This 33 MHz capability enables faster boot code loading and firmware updates compared to lower-speed SPI flash alternatives, while maintaining full compatibility with legacy SPI controllers configured for Mode 0 or Mode 3.
Is the SST25LF020A-33-4C-QAE-T pin-compatible with the SST25VF020B?
Yes, the SST25LF020A-33-4C-QAE-T and SST25VF020B share identical 8-lead SOIC 150-mil packaging and pinout. However, they are not drop-in replacements due to differences in timing parameters, command set enhancements, and voltage tolerance - SST25VF020B operates down to 2.7 V and supports 70 MHz reads. System validation is required before substitution.
Does the SST25LF020A-33-4C-QAE-T support hardware write protection?
Yes, the SST25LF020A-33-4C-QAE-T includes a dedicated WP# pin that enables hardware lock-down of the Block-Protection Lock (BPL) bit in the status register. When WP# is driven low, BP1 and BP0 become read-only, preventing accidental or malicious modification of protected memory regions - a critical feature for safeguarding bootloader or calibration data.
What is the purpose of the HOLD# pin on the SST25LF020A-33-4C-QAE-T?
The HOLD# pin on the SST25LF020A-33-4C-QAE-T suspends an ongoing SPI transaction without deselecting the device or resetting internal state. When asserted low (synchronized with SCK low), it places SO in high-impedance and pauses communication - allowing host processors to service interrupts or switch contexts while preserving flash operation integrity, especially valuable in real-time embedded systems.
What temperature grades are available for the SST25LF020A-33-4C-QAE-T?
The SST25LF020A-33-4C-QAE-T is specified for commercial temperature operation (0°C to +70°C), as indicated by the "C" in its part number suffix. Industrial (-40°C to +85°C) and extended (-20°C to +85°C) variants exist under different ordering codes (e.g., SST25LF020A-33-4I-QAE-T), but this specific variant is rated only for commercial-grade environments.
SST25LF020A-33-4C-QAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- 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:
- SPI
- Clock Frequency:
- 33 MHz
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON
SST25LF020A-33-4C-QAE-T FAQ
1.How can I place an order for SST25LF020A-33-4C-QAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25LF020A-33-4C-QAE-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 SST25LF020A-33-4C-QAE-T reliable?
The price and inventory of SST25LF020A-33-4C-QAE-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25LF020A-33-4C-QAE-T is usually 5 days.
3.What payment methods are accepted for SST25LF020A-33-4C-QAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25LF020A-33-4C-QAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25LF020A-33-4C-QAE-T?
SST25LF020A-33-4C-QAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25LF020A-33-4C-QAE-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 SST25LF020A-33-4C-QAE-T?
For technical support, including SST25LF020A-33-4C-QAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25LF020A-33-4C-QAE-T requirements.
6.How does Aetrix verify that SST25LF020A-33-4C-QAE-T is sourced from the original manufacturer or authorized distributors?
All SST25LF020A-33-4C-QAE-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 SST25LF020A-33-4C-QAE-T meets industry standards.
7.What is the process for return or replacement of SST25LF020A-33-4C-QAE-T?
All SST25LF020A-33-4C-QAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25LF020A-33-4C-QAE-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 SST25LF020A-33-4C-QAE-T part is unused and in its original packaging.
Return procedure for SST25LF020A-33-4C-QAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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