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Microchip Technology SST25VF020-20-4C-SAE-T
- Part No.:
- SST25VF020-20-4C-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF020-20-4C-SAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,718
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Product details
Overview
SST25VF020-20-4C-SAE-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 SPI clock (Mode 0/3), delivers 100,000 program/erase cycles, and retains data >100 years - used in industrial controllers, IoT edge nodes, and boot memory for microcontrollers.
For engineers reviewing the SST25VF020-20-4C-SAE-T datasheet, SST25VF020-20-4C-SAE-T pinout, SST25VF020-20-4C-SAE-T application, or SST25VF020-20-4C-SAE-T equivalent, key selection considerations include its SOIC-8 (150 mil) package, hardware HOLD#/WP# pins, AAI programming mode, sector/block erase flexibility, and compatibility with legacy SPI host interfaces requiring low-pin-count nonvolatile storage.
Technical Context
The SST25VF020-20-4C-SAE-T implements a four-wire SPI interface with dual-mode support (Mode 0 and Mode 3), enabling interoperability with diverse microcontroller SPI peripherals. Its SuperFlash technology uses a split-gate cell and thick-oxide tunneling injector to achieve faster erase times and lower energy per operation versus conventional flash.
It features a software-configurable status register with BUSY/WEL/BP0/BP1/BPL/AAI bits, hardware-assisted write protection via WP# and HOLD#, and flexible erase granularity: uniform 4 KByte sectors and 32 KByte overlay blocks - all managed through standardized 8-bit opcodes synchronized to CE# transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 bytes), organized as 64 × 4 KByte sectors |
| Supply Voltage | 2.7–3.6 V - enables direct connection to 3.3 V logic rails without level shifting |
| Max SPI Clock | 20 MHz - supports fast read throughput up to ~2.5 MB/s (with dummy cycles) |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over product lifetime |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unpowered storage |
| Erase Time | Sector-erase: 18 ms typical; chip-erase: 70 ms typical - reduces update latency vs. slower alternatives |
| Active Read Current | 7 mA typical - minimizes power draw during code fetch or configuration reads |
| Standby Current | 8 µA typical - critical for battery-backed or ultra-low-power wake-on-event designs |
Pinout & Package
Package: 8-lead SOIC, 150 mil body width (SAE suffix), RoHS-compliant, commercial temperature range (0°C to +70°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; high-to-low transition initiates instruction acceptance |
| SO | Serial Data Output | Tri-state output; data shifted out on SCK falling edge; high-impedance during HOLD# active |
| WP# | Write Protect | Hardware lock-down control for status register BP bits; enables BPL bit when driven low |
| VSS | Ground | Reference return path for all I/O and core circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.7–3.6 V input; decoupling capacitor (0.1 µF) required near pin for stable operation |
| HOLD# | Hold Control | Suspends ongoing SPI transfer without deselecting device; allows host to service higher-priority interrupts |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge latches SI, falling edge drives SO |
| SI | Serial Data Input | Command/address/data input; MSB-first; sampled on SCK rising edge |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) | Reduces multi-byte programming time by eliminating repeated address transmission - ideal for bulk firmware writes |
| Flexible Block Protection | BP0/BP1 bits enable software-selectable protection of 0%, 25%, 50%, or 100% of memory - prevents accidental overwrite of bootloader or calibration data |
| HOLD# Pin Functionality | Pauses SPI communication mid-transfer without resetting internal state - preserves address pointer and avoids reinitialization overhead |
| SuperFlash Technology | Split-gate cell architecture lowers program/erase voltage stress and improves endurance/reliability over standard NOR flash |
| Dual SPI Mode Support | Compatible with both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) - simplifies integration with diverse MCU SPI peripherals |
Applications
| Industrial PLC Firmware Storage | IoT Sensor Node Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic programs and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access read capability and robust sector-level erase for field updates. Use Value: 100,000-cycle endurance and >100-year retention ensure reliable operation across 15+ year equipment lifecycles without data loss. | Use Scenario: Holding sensor calibration coefficients, network credentials, and firmware update staging buffers in battery-powered environmental monitors. IC Role / Device Role / Timing Role: Low-power configuration store supporting infrequent writes and frequent reads under tight energy budgets. Use Value: 8 µA standby current and 7 mA active read current extend coin-cell battery life to multi-year operation between replacements. |
| Embedded Boot Memory for MCUs | Medical Device Parameter Archiving |
Use Scenario: Executing XIP (eXecute-In-Place) boot code for ARM Cortex-M microcontrollers in medical diagnostic instruments. IC Role / Device Role / Timing Role: Primary boot image repository accessed directly via SPI bus during cold start and reset recovery. Use Value: 20 MHz SPI clock and uniform 4 KByte sector erase allow rapid boot sequence initialization and secure firmware rollback capability. | Use Scenario: Logging patient treatment parameters and device operational history in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: Tamper-resistant archival memory with hardware write protection to meet IEC 62304 data integrity requirements. Use Value: WP# pin + BPL-enabled status register lock-down prevents unauthorized modification of critical safety-critical logs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25X20CL | 2 Mbit, 3.3 V, 20 MHz, SOIC-8; lacks HOLD# pin and AAI programming mode | Requires software-managed pause/resume; no hardware-assisted multi-byte programming acceleration | Choose when HOLD# and AAI are unused and cost is primary driver |
| Macronix MX25L2005 | 2 Mbit, 3.3 V, 20 MHz, SOIC-8; supports HOLD# but no AAI; different status register layout | Hardware hold supported, but bulk programming requires full address retransmission per byte | Prefer when existing firmware already handles hold timing and does not rely on AAI efficiency gains |
Compared with SST25VF020-20-4C-SAE-T, W25X20CL omits critical hardware features for interrupt-safe operation and efficient programming, while MX25L2005 retains HOLD# but sacrifices AAI - making SST25VF020-20-4C-SAE-T uniquely suited for systems needing both deterministic pause capability and high-throughput firmware updates.
Availability
SST25VF020-20-4C-SAE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and IoT edge gateways requiring stable component supply and long-term obsolescence management.
Supply support for SST25VF020-20-4C-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, longevity, and design-in support.
The SST25VF020-20-4C-SAE-T belongs to Microchip's legacy serial flash portfolio derived from Silicon Storage Technology (SST), engineered for cost-sensitive, low-power embedded applications where SPI interface simplicity and proven flash endurance are essential.
FAQ
What is the operating temperature range for SST25VF020-20-4C-SAE-T?
The SST25VF020-20-4C-SAE-T is rated for commercial temperature operation from 0°C to +70°C. This range is defined by the 'C' in the part number and applies to the SOIC-8 (SAE) package variant. Industrial (-40°C to +85°C) and extended (-20°C to +85°C) versions exist under different suffixes, but SST25VF020-20-4C-SAE-T specifically meets the commercial specification.
Does SST25VF020-20-4C-SAE-T support both SPI Mode 0 and Mode 3?
Yes, SST25VF020-20-4C-SAE-T explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). The device samples SI on the rising edge of SCK and drives SO on the falling edge in both modes, differing only in the idle state of SCK - low for Mode 0, high for Mode 3 - ensuring broad MCU compatibility.
How does the HOLD# pin function in SST25VF020-20-4C-SAE-T?
The HOLD# pin in SST25VF020-20-4C-SAE-T suspends an active SPI transaction without deselecting the device or resetting internal state. When asserted low (while CE# is active), it places SO in high-impedance and pauses clock synchronization - allowing the host MCU to service interrupts or reallocate resources before resuming. SST25VF020-20-4C-SAE-T exits HOLD# only when HOLD# returns high coincident with SCK low.
What is the purpose of Auto Address Increment (AAI) in SST25VF020-20-4C-SAE-T?
Auto Address Increment (AAI) in SST25VF020-20-4C-SAE-T eliminates the need to resend the full 24-bit address for each subsequent byte during sequential programming. After issuing the initial AFH command and address, successive AFH commands with new data automatically increment the internal address pointer - reducing total programming time significantly compared to standard byte-program mode. SST25VF020-20-4C-SAE-T exits AAI only upon WRDI command.
Is SST25VF020-20-4C-SAE-T recommended for new designs?
No - SST25VF020-20-4C-SAE-T is marked "Not Recommended for New Designs" in its official datasheet (DS25078A). Microchip recommends migrating to the pin-compatible SST25VF020B variant, which offers enhanced reliability, updated process technology, and continued long-term supply assurance. SST25VF020-20-4C-SAE-T remains available for legacy support and repair, but new designs should evaluate SST25VF020B.
SST25VF020-20-4C-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:
- 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-SOIC
SST25VF020-20-4C-SAE-T FAQ
1.How can I place an order for SST25VF020-20-4C-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF020-20-4C-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 SST25VF020-20-4C-SAE-T reliable?
The price and inventory of SST25VF020-20-4C-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 SST25VF020-20-4C-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF020-20-4C-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF020-20-4C-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF020-20-4C-SAE-T?
SST25VF020-20-4C-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF020-20-4C-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 SST25VF020-20-4C-SAE-T?
For technical support, including SST25VF020-20-4C-SAE-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-SAE-T requirements.
6.How does Aetrix verify that SST25VF020-20-4C-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF020-20-4C-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 SST25VF020-20-4C-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF020-20-4C-SAE-T?
All SST25VF020-20-4C-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF020-20-4C-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 SST25VF020-20-4C-SAE-T part is unused and in its original packaging.
Return procedure for SST25VF020-20-4C-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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