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Microchip Technology SST25LF020A-33-4C-SAE-T
- Part No.:
- SST25LF020A-33-4C-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25LF020A-33-4C-SAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 33MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
SST25LF020A-33-4C-SAE-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, used for firmware storage in embedded microcontroller systems.
For engineers reviewing the SST25LF020A-33-4C-SAE-T datasheet, SST25LF020A-33-4C-SAE-T pinout, SST25LF020A-33-4C-SAE-T application, or SST25LF020A-33-4C-SAE-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, 8 µA standby current, software/hardware write protection (WP#/HOLD#), Auto Address Increment programming, and SOIC-8 150-mil package suitability for space-constrained industrial control and IoT edge devices.
Technical Context
The SST25LF020A-33-4C-SAE-T implements a four-wire SPI interface (CE#, SCK, SI, SO) with dual-mode clock polarity support (Mode 0 and Mode 3), enabling interoperability with diverse host controllers without hardware reconfiguration. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling for enhanced endurance and data retention.
It features dedicated control pins-HOLD# for pausing ongoing serial transfers without deselecting the device, and WP# for enabling status register lock-down via BPL bit-providing deterministic timing control and secure configuration management during firmware updates and field programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes), organized as 64 × 4 KByte sectors or 8 × 32 KByte overlay blocks |
| Supply Voltage | 3.0–3.6 V single supply; enables direct integration with 3.3 V logic domains without level-shifting |
| Max Clock Frequency | 33 MHz for High-Speed-Read (0BH command); reduces firmware load latency by ~65% vs. standard 20 MHz Read (03H) |
| Endurance | 100,000 program/erase cycles per sector; supports frequent field firmware updates in industrial gateways |
| Data Retention | Greater than 100 years at +25°C; ensures long-term reliability in unattended infrastructure equipment |
| Active Read Current | 7 mA typical at 33 MHz; balances performance and power in battery-backed or energy-harvested nodes |
| Standby Current | 8 µA typical; minimizes quiescent power draw during sleep modes in always-on edge sensors |
Pinout & Package
Package: 8-lead SOIC, 150 mil body width (SAE designation), RoHS-compliant, surface-mountable with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout full instruction cycle (e.g., Read, Erase, Program) |
| SCK | Serial Clock | Timing reference for SPI; rising edge latches input (SI), falling edge outputs data (SO); supports Mode 0 (idle low) and Mode 3 (idle high) |
| SI | Serial Data Input | Command, address, and data input path; MSB-first, synchronized to SCK rising edge |
| SO | Serial Data Output | Read data and status register output; driven on SCK falling edge; tri-states during HOLD# active |
| WP# | Write Protect | Hardware enable for Block-Protection-Lock (BPL); when low, prevents modification of BP1/BP0/BPL bits unless BPL=0 |
| HOLD# | Hold Control | Pauses ongoing SPI transfer without resetting internal state; requires CE# low and synchronous SCK edge alignment |
| VDD | Power Supply | 3.0–3.6 V core supply; decoupling capacitor required within 10 mm of pin per layout guidelines |
| VSS | Ground | Reference return path; must be connected to system ground plane with low-inductance trace |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces multi-byte programming time by eliminating repeated address transmission; supports sequential byte writes with single AFH command per byte |
| Flexible Block Protection | Software-configurable BP1/BP0 bits protect 0%, 25%, 50%, or 100% of memory array; BPL bit enables permanent lock-down via WP# pin |
| High-Speed-Read at 33 MHz | Enables faster boot code execution and OTA update verification; requires dummy byte insertion after address before data stream begins |
| SuperFlash Technology | Split-gate cell architecture delivers 100× better erase/write efficiency vs. conventional flash, lowering total energy per operation |
| Hold Function with No Reset | Preserves internal address pointer and command state during HOLD# assertion, enabling deterministic interrupt handling in real-time systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing programmable logic controller firmware images and configuration parameters in DIN-rail mounted automation controllers. IC Role / Device Role / Timing Role: Non-volatile code storage accessed via SPI during cold boot and runtime firmware validation; operates under -40°C to +85°C industrial temperature range. Use Value: 100,000-cycle endurance supports field firmware upgrades over 10+ years; 8 µA standby current extends uptime in mains-powered but low-power-idle systems. | Use Scenario: Holding certified bootloader and secure boot keys in Class II medical diagnostic instruments requiring IEC 62304 compliance. IC Role / Device Role / Timing Role: Trusted code repository with hardware write protection (WP#) and software block-lock (BPL) preventing unauthorized modification of critical startup routines. Use Value: >100-year data retention ensures integrity of cryptographic keys across product lifetime; RoHS-compliant packaging meets global regulatory requirements. |
| Smart Meter Firmware Update Buffer | IoT Edge Node Configuration Store |
Use Scenario: Acting as intermediate buffer for encrypted firmware patches received over LPWAN in utility smart meters. IC Role / Device Role / Timing Role: Dual-role memory: stores validated patch image pre-installation and retains rollback version; leverages AAI mode for fast patch write. Use Value: 33 MHz High-Speed-Read accelerates signature verification; sector-erase granularity (4 KByte) enables atomic patch application without disrupting active metering functions. | Use Scenario: Persisting sensor calibration data, network credentials, and device-specific identifiers in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Low-power configuration store accessed intermittently via SPI; uses HOLD# to suspend reads during MCU interrupts without bus reinitialization. Use Value: 7 mA active current and 8 µA standby minimize impact on 10-year coin-cell battery life; software write protection prevents accidental credential overwrite during OTA updates. |
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-33-4C-SAE-T | Successor part with identical pinout, voltage, and density; improved 100 kHz–50 MHz frequency range and 200K endurance rating | Recommended for new designs; supports higher-speed host interfaces and longer field lifecycle | Select when designing new products requiring extended longevity and broader clock compatibility |
| AT25DF021-SSH-T | 2 Mbit SPI flash from Microchip (Atmel); same 3.3 V supply and SOIC-8 package; supports 85 MHz max clock but lacks HOLD# pin | Used where higher throughput is prioritized over pause-capable communication; no hardware hold function | Choose when host MCU lacks HOLD# signal routing capability or when simplified control logic is preferred |
Compared with SST25LF020A-33-4C-SAE-T, SST25VF020B-33-4C-SAE-T offers higher endurance and wider clock range for future-proofing, while AT25DF021-SSH-T trades HOLD# functionality for greater read bandwidth-making each alternative suitable for distinct system-level timing and reliability trade-offs.
Availability
SST25LF020A-33-4C-SAE-T is available at Aetrix Electronics and suitable for industrial control, medical diagnostics, smart metering, and IoT edge node applications requiring stable component supply and long-term obsolescence management.
Supply support for SST25LF020A-33-4C-SAE-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, security, and long-term support.
The SST25LF020A-33-4C-SAE-T belongs to Microchip's legacy SST serial flash product line, designed specifically for cost-sensitive, space-constrained embedded systems needing robust non-volatile storage with industrial-grade temperature tolerance and low-power operation.
FAQ
What is the maximum clock frequency supported by SST25LF020A-33-4C-SAE-T for read operations?
The SST25LF020A-33-4C-SAE-T supports up to 33 MHz for High-Speed-Read operations using the 0BH command with a dummy byte, while standard Read (03H) is rated to 20 MHz. This 33 MHz capability enables faster firmware loading and reduces boot time in resource-constrained microcontroller systems using the SST25LF020A-33-4C-SAE-T.
Does SST25LF020A-33-4C-SAE-T support both SPI Mode 0 and Mode 3?
Yes, the SST25LF020A-33-4C-SAE-T explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), allowing seamless integration with host controllers that implement either clock polarity configuration without requiring hardware adaptation or firmware workarounds for the SST25LF020A-33-4C-SAE-T.
What package type is used for SST25LF020A-33-4C-SAE-T?
The SST25LF020A-33-4C-SAE-T uses an 8-lead SOIC package with 150 mil body width (SAE suffix), RoHS-compliant and compatible with standard surface-mount assembly processes. This package is distinct from the 8-contact WSON variant and is optimized for through-hole prototyping and automated reflow in industrial PCB layouts using the SST25LF020A-33-4C-SAE-T.
How does the HOLD# pin function on SST25LF020A-33-4C-SAE-T?
The HOLD# pin on SST25LF020A-33-4C-SAE-T suspends an active SPI transaction without deselecting the device or resetting internal state-preserving the address pointer and command context. It requires CE# to be low and synchronizes to SCK edges, enabling deterministic interrupt handling in real-time applications using the SST25LF020A-33-4C-SAE-T.
Is SST25LF020A-33-4C-SAE-T recommended for new designs?
No, SST25LF020A-33-4C-SAE-T is marked "Not Recommended for New Designs" by Microchip. The SST25VF020B-33-4C-SAE-T is its designated successor with improved endurance (200K cycles), wider frequency range (100 kHz–50 MHz), and continued long-term support-making it the preferred choice for any new implementation involving the SST25LF020A-33-4C-SAE-T functional class.
SST25LF020A-33-4C-SAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
SST25LF020A-33-4C-SAE-T FAQ
1.How can I place an order for SST25LF020A-33-4C-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25LF020A-33-4C-SAE-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-SAE-T reliable?
The price and inventory of SST25LF020A-33-4C-SAE-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-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25LF020A-33-4C-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25LF020A-33-4C-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25LF020A-33-4C-SAE-T?
SST25LF020A-33-4C-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25LF020A-33-4C-SAE-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-SAE-T?
For technical support, including SST25LF020A-33-4C-SAE-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-SAE-T requirements.
6.How does Aetrix verify that SST25LF020A-33-4C-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25LF020A-33-4C-SAE-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-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25LF020A-33-4C-SAE-T?
All SST25LF020A-33-4C-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25LF020A-33-4C-SAE-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-SAE-T part is unused and in its original packaging.
Return procedure for SST25LF020A-33-4C-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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