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Microchip Technology SST25VF020-20-4C-QAE-T
- Part No.:
- SST25VF020-20-4C-QAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25VF020-20-4C-QAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 20MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,717
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Product details
Overview
SST25VF020-20-4C-QAE-T from Microchip Technology is a 2 Mbit SPI serial flash memory IC designed for embedded firmware storage and code execution in resource-constrained systems. It operates from a single 2.7–3.6 V supply, supports 20 MHz max clock frequency, features uniform 4 KByte sectors and 32 KByte overlay blocks, and delivers 100,000 program/erase cycles with >100 years data retention - used in industrial control firmware updates and boot code storage.
For engineers reviewing the SST25VF020-20-4C-QAE-T datasheet, SST25VF020-20-4C-QAE-T pinout, SST25VF020-20-4C-QAE-T application, or SST25VF020-20-4C-QAE-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, SOIC-8 (150 mil) package footprint, software/hardware write protection (WP#/HOLD#), Auto Address Increment (AAI) programming efficiency, and commercial temperature range (0°C to +70°C).
Technical Context
The SST25VF020-20-4C-QAE-T implements a four-wire SPI interface (SCK, SI, SO, CE#) with dual-mode support (SPI Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash technology uses a split-gate cell and thick-oxide tunneling injector to achieve faster erase times (sector-erase: 18 ms typ.) and lower total energy per operation versus conventional flash.
It integrates hardware-level control via dedicated HOLD# (suspend ongoing serial sequence without deselecting) and WP# (enable/disable status register lock-down), alongside software-managed block protection (BP1/BP0) and AAI programming mode - all coordinated through a 8-bit software status register with BUSY, WEL, and BPL bits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8 bits), organized as 64 uniform 4 KByte sectors |
| Supply Voltage | 2.7–3.6 V - enables direct connection to 3.3 V logic rails without level-shifting |
| Max Clock Frequency | 20 MHz - supports high-throughput firmware read/write at up to 2.5 MB/s effective rate |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware update cycles over 10+ years |
| Data Retention | >100 years at +25°C - ensures long-term reliability of stored boot code and configuration data |
| Active Read Current | 7 mA typical - minimizes power draw during code execution from XIP (execute-in-place) configurations |
| Standby Current | 8 µA typical - supports ultra-low-power sleep modes in battery-backed 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 device select; must remain low throughout command sequences to maintain SPI session |
| 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 enable for status register lock-down (BPL bit); low = BP1/BP0 become read-only when BPL=1 |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | Single 2.7–3.6 V supply input; decoupling capacitor (0.1 µF) required near pin for noise immunity |
| HOLD# | Hold | Pauses ongoing SPI transfer without resetting internal address pointer or clock state; active-low |
| SCK | Serial Clock | Timing reference; rising edge latches SI, falling edge outputs SO; supports idle-high (Mode 3) or idle-low (Mode 0) |
| SI | Serial Data Input | Command/address/data input; sampled on rising edge of SCK; MSB-first protocol |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) | Reduces multi-byte programming time by eliminating repeated address transmission - critical for fast firmware patching |
| Flexible Erase Architecture | Independent 4 KByte sector and 32 KByte block erase options allow granular firmware partitioning and wear leveling |
| Dual SPI Mode Support | Native compatibility with both Mode 0 (SCK idle low) and Mode 3 (SCK idle high) hosts eliminates interface translation logic |
| Hardware Write Protection | WP# pin directly controls status register lock-down, enabling secure factory provisioning and field update safeguards |
| Hold Function | HOLD# suspends SPI communication mid-sequence without interrupting internal timing - essential for real-time system arbitration |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile code storage with execute-in-place (XIP) capability and robust error resilience during brown-out conditions. Use Value: 100,000 endurance cycles and >100-year data retention ensure firmware integrity across 15+ year product lifecycles without refresh. |
Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot memory with hardware write protection (WP#) and status register lock-down. Use Value: BPL-enabled status register prevents accidental corruption of protected boot sectors during field service or software updates. |
| Consumer IoT Edge Node Configuration | Automotive Body Control Module (BCM) Parameter Storage |
|
Use Scenario: Storing calibrated sensor offsets, network credentials, and user preferences in battery-powered smart sensors. IC Role / Device Role / Timing Role: Low-power configuration store supporting rapid wake-from-sleep reads and infrequent writes. Use Value: 8 µA standby current and 7 mA active read current extend battery life in coin-cell-powered nodes beyond 5 years. |
Use Scenario: Retaining vehicle-specific calibration data (e.g., window lift profiles, mirror positions) across ignition cycles. IC Role / Device Role / Timing Role: Automotive-grade parameter storage with sector-level erase granularity for selective updates. Use Value: Uniform 4 KByte sectors enable independent erasure of BCM sub-system parameters without disturbing core firmware. |
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 |
|---|---|---|---|
| Winbond W25Q20CLSNIG | 2 Mbit density, 104 MHz max clock, Quad SPI support, 1.65–1.95 V or 2.7–3.6 V dual supply | Higher throughput and lower voltage option; lacks HOLD# pin and AAI programming | Select for new designs requiring faster read performance or dual-voltage flexibility; not pin-compatible |
| Macronix MX25L2006EM1I-12G | 2 Mbit density, 80 MHz max clock, standard SPI only, 2.7–3.6 V supply, SOIC-8 package | Identical pinout and voltage range; no AAI mode; slower sector-erase (25 ms vs. 18 ms) | Drop-in replacement for legacy board reuse where AAI is unused; verified functional equivalence in boot loader storage |
Compared with SST25VF020-20-4C-QAE-T, W25Q20CLSNIG offers higher bandwidth but requires PCB redesign due to different pin functions and no HOLD#, while MX25L2006EM1I-12G provides identical SOIC-8 layout compatibility and voltage operation but omits AAI acceleration - making it suitable for cost-sensitive, non-performance-critical firmware storage.
Availability
SST25VF020-20-4C-QAE-T is available at Aetrix Electronics and suitable for industrial control firmware updates, medical device boot code storage, and consumer IoT configuration retention requiring stable component supply and long-term lifecycle support.
Supply support for SST25VF020-20-4C-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 specializing in microcontrollers, analog devices, and memory solutions, with deep expertise in embedded control and secure connectivity.
The SST25VF020-20-4C-QAE-T belongs to Microchip's legacy SST serial flash family, engineered for reliable, low-power, SPI-based code and data storage in cost-sensitive industrial and consumer applications - prior to the introduction of the enhanced SST25VF020B variant.
FAQ
What is the operating temperature range for SST25VF020-20-4C-QAE-T?
The SST25VF020-20-4C-QAE-T is rated for commercial temperature operation from 0°C to +70°C. This range is validated for stable read/write performance and data retention under typical indoor embedded system conditions. The 'C' in the part number explicitly denotes the commercial grade; industrial (-40°C to +85°C) and extended (-20°C to +85°C) variants exist but are distinct orderables. SST25VF020-20-4C-QAE-T must not be deployed outside its specified thermal envelope without derating analysis.
Does SST25VF020-20-4C-QAE-T support Quad SPI mode?
No, SST25VF020-20-4C-QAE-T supports only standard four-wire SPI (single I/O) with SI and SO lines - it does not implement Quad SPI (QSPI) or Dual SPI interfaces. Its instruction set, pinout, and timing diagrams confirm exclusive use of SI for input and SO for output. Any design requiring quad data lane throughput must select a different flash family, such as Microchip's SST26 series or Winbond's W25Qxx family. SST25VF020-20-4C-QAE-T remains fully compatible with legacy SPI controllers using Mode 0 or Mode 3.
What is the purpose of the HOLD# pin on SST25VF020-20-4C-QAE-T?
The HOLD# pin on SST25VF020-20-4C-QAE-T allows temporary suspension of an ongoing SPI transaction without deselecting the device or resetting the internal address counter. When asserted low (with CE# held active), it places SO in high-impedance state while preserving command context - enabling priority interrupt handling in real-time systems. Resuming requires de-asserting HOLD# while maintaining CE# low. This behavior is electrically defined in the DS25078A datasheet Figure 4 and is functionally distinct from chip reset or standby modes. SST25VF020-20-4C-QAE-T relies on this feature for deterministic bus arbitration.
Can SST25VF020-20-4C-QAE-T be used as a direct replacement for SST25VF020B?
No, SST25VF020-20-4C-QAE-T is not a direct replacement for SST25VF020B. Although both are 2 Mbit SPI flash devices, the SST25VF020B introduces enhanced features including faster erase times (10 ms sector-erase), improved write protection granularity, and updated electrical specifications. Microchip explicitly marks SST25VF020-20-4C-QAE-T as "Not Recommended for New Designs" in favor of the B-version. SST25VF020-20-4C-QAE-T may operate in legacy systems designed for the original part, but interoperability requires verification of timing margins and status register behavior - especially for AAI and block-protection sequences.
How does Auto Address Increment (AAI) programming work in SST25VF020-20-4C-QAE-T?
AAI programming in SST25VF020-20-4C-QAE-T enables sequential byte programming without retransmitting the full 24-bit address for each byte. After issuing the initial AFH command with starting address and first data byte, subsequent bytes are written using only the AFH opcode followed by data - the internal address pointer auto-increments. This reduces total programming time by ~40% versus standard byte-program mode. AAI terminates upon executing WRDI (04H); the device exits AAI mode if the highest unprotected address is reached. SST25VF020-20-4C-QAE-T implements AAI per Table 5 and Figure 7 in DS25078A, and it requires WREN activation before entry.
SST25VF020-20-4C-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:
- 20 MHz
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON
SST25VF020-20-4C-QAE-T FAQ
1.How can I place an order for SST25VF020-20-4C-QAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF020-20-4C-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 SST25VF020-20-4C-QAE-T reliable?
The price and inventory of SST25VF020-20-4C-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 SST25VF020-20-4C-QAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF020-20-4C-QAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF020-20-4C-QAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF020-20-4C-QAE-T?
SST25VF020-20-4C-QAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF020-20-4C-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 SST25VF020-20-4C-QAE-T?
For technical support, including SST25VF020-20-4C-QAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF020-20-4C-QAE-T requirements.
6.How does Aetrix verify that SST25VF020-20-4C-QAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF020-20-4C-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 SST25VF020-20-4C-QAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF020-20-4C-QAE-T?
All SST25VF020-20-4C-QAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF020-20-4C-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 SST25VF020-20-4C-QAE-T part is unused and in its original packaging.
Return procedure for SST25VF020-20-4C-QAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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