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Microchip Technology SST25VF020-20-4I-SAE-T
- Part No.:
- SST25VF020-20-4I-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF020-20-4I-SAE-T.pdf
- Description:
- IC FLASH 2MBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,409
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Product details
Overview
SST25VF020-20-4I-SAE-T from Microchip Technology is a 2 Mbit SPI serial flash memory IC designed for embedded firmware storage and configuration data retention in microcontroller-based systems. It operates from a single 2.7–3.6 V supply, supports up to 20 MHz clock frequency, delivers 100,000 program/erase cycles, and guarantees >100 years of data retention - deployed in industrial control panels requiring nonvolatile code storage with sector-level write protection.
For engineers reviewing the SST25VF020-20-4I-SAE-T datasheet, SST25VF020-20-4I-SAE-T pinout, SST25VF020-20-4I-SAE-T application, or SST25VF020-20-4I-SAE-T equivalent, key selection considerations include SPI Mode 0/3 compatibility, 4 KByte uniform sector erase, Auto Address Increment (AAI) programming efficiency, HOLD#/WP# hardware control, and SOIC-8 (150 mil) package compatibility with legacy board layouts.
Technical Context
This SPI flash uses SST's proprietary SuperFlash technology with split-gate cell architecture and thick-oxide tunneling injector, enabling lower program/erase energy versus conventional NOR flash. Its command set includes standard SPI opcodes (03H Read, 02H Byte-Program, 20H Sector-Erase, 60H Chip-Erase) plus AAI (AFH) for accelerated sequential writes.
The device implements a software status register with BUSY, WEL, BP0/BP1, BPL, and AAI bits, and supports hardware-assisted protection via WP# (status register lock-down) and HOLD# (serial transaction suspension without chip deselection), all synchronized to CE#-controlled SPI framing.
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 | 2.7–3.6 V - enables direct interface with 3.3 V logic domains without level-shifting |
| Max Clock Frequency | 20 MHz - supports up to 2.5 MB/s read throughput in continuous mode |
| Endurance | 100,000 program/erase cycles - sufficient for firmware update logging in field-deployed devices |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unpowered storage applications |
| Erase Time | 18 ms typical for sector/block; 70 ms typical for chip-erase - enables rapid field reprogramming |
| Active Read Current | 7 mA typical - minimizes power draw during boot-time firmware fetch |
| 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 (SAE suffix), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout full SPI command sequence |
| SO | Serial Data Output | Tri-state output; drives data on falling SCK edge; high-impedance during HOLD# active |
| WP# | Write Protect | Hardware enable for status register lock-down (BPL bit); low = BPL becomes read-only |
| VSS | Ground | Reference return path for all I/O and core circuitry |
| VDD | Power Supply | Single 2.7–3.6 V supply powering core logic and memory array |
| HOLD# | Hold Control | Suspends ongoing SPI transfer without resetting internal address pointer or clock state |
| SCK | Serial Clock | Input timing reference; rising edge latches SI, falling edge outputs SO; supports Mode 0/3 |
| SI | Serial Data Input | Command/address/data input; sampled on rising SCK edge; MSB-first protocol |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Interoperable with both common MCU SPI controllers without clock polarity/inversion reconfiguration |
| Auto Address Increment (AAI) | Reduces total programming time by eliminating repeated address transmission during sequential byte writes |
| Flexible Block Protection | BP0/BP1 bits enable software-selectable protection of 0%, 25%, 50%, or 100% of memory array |
| HOLD# Pin Functionality | Enables multi-master arbitration or debug pause without breaking SPI session continuity or losing address context |
| SuperFlash Technology | Delivers lower energy per erase/program cycle than standard NOR flash, extending system battery life |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing boot firmware and calibration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast sector erase for field updates and hardware-controlled write protection against accidental corruption. Use Value: 100,000-cycle endurance and >100-year data retention ensure reliable operation over 15+ year product lifecycles without refresh. | Use Scenario: Holding patient-specific settings and regulatory-compliant device logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure configuration storage with WP#-enabled lock-down of critical parameters and HOLD#-assisted safe interrupt handling during real-time monitoring. Use Value: Software block protection (BP0/BP1) prevents unauthorized modification of FDA-mandated calibration data during runtime. |
| Automotive Body Control Module | IoT Edge Node OTA Storage |
Use Scenario: Retaining lighting profiles, window position maps, and fault history in 12 V automotive subsystems with wide temperature swings. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) serial flash providing robust firmware backup with minimal PCB footprint. Use Value: SOIC-8 package allows drop-in replacement in existing designs; 8 µA standby current extends battery backup duration during vehicle sleep mode. | Use Scenario: Caching encrypted firmware images prior to secure over-the-air (OTA) installation on constrained wireless sensor nodes. IC Role / Device Role / Timing Role: High-speed (20 MHz) SPI interface enables rapid image download; AAI programming accelerates post-download flashing. Use Value: 14 µs typical byte-program time and 18 ms sector-erase reduce OTA downtime by >40% versus legacy SPI flash alternatives. |
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 suspend/resume; no hardware-accelerated sequential write support | Choose when HOLD# and AAI are unused; verify SPI timing margins match MCU controller |
| Macronix MX25L2006E | 2 Mbit, 3.3 V, 20 MHz, SOIC-8; supports HOLD#, but uses different status register layout and block protection scheme | BP bits map differently; requires firmware adaptation for write protection configuration | Prefer for new designs needing long-term supply; validate status register initialization sequence |
Compared with SST25VF020-20-4I-SAE-T, W25X20CL omits critical hardware controls (HOLD#, AAI), increasing firmware complexity, while MX25L2006E retains HOLD# but demands register-level redesign for protection management - making SST25VF020-20-4I-SAE-T optimal for legacy-compatible industrial upgrades where pinout and feature parity are essential.
Availability
SST25VF020-20-4I-SAE-T is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive body electronics, and IoT edge node designs requiring stable component supply and proven field reliability.
Supply support for SST25VF020-20-4I-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 specializing in microcontrollers, analog, FPGA, and memory solutions, with broad industrial and automotive qualification coverage.
SST25VF020-20-4I-SAE-T belongs to Microchip's legacy SST serial flash product line, engineered for cost-sensitive, space-constrained embedded systems requiring robust nonvolatile storage with SPI simplicity and hardware safety features.
FAQ
What is the operating temperature range for SST25VF020-20-4I-SAE-T?
The SST25VF020-20-4I-SAE-T is rated for industrial operation from –40°C to +85°C, matching the "I" grade in its part number. This range ensures reliable performance in factory automation, outdoor telemetry, and automotive under-hood applications where ambient thermal stress exceeds commercial limits. The device maintains full specification compliance across this span, including 20 MHz clock operation and 100,000-cycle endurance.
Does SST25VF020-20-4I-SAE-T support both SPI Mode 0 and Mode 3?
Yes, SST25VF020-20-4I-SAE-T explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as confirmed in the DS25078A datasheet. This dual-mode capability allows seamless integration with diverse microcontrollers - such as STM32, PIC, and NXP Kinetis - without requiring clock polarity or phase inversion in firmware. SI is sampled on the rising SCK edge, and SO is driven on the falling edge in both modes.
How does the HOLD# pin function in SST25VF020-20-4I-SAE-T?
The HOLD# pin in SST25VF020-20-4I-SAE-T suspends an active 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 while preserving command state - enabling multi-master arbitration or debug pause. Resuming requires only deasserting HOLD# while keeping CE# low. This behavior is electrically defined and timing-verified per Figure 4 in the DS25078A datasheet.
What is the purpose of the WP# pin on SST25VF020-20-4I-SAE-T?
The WP# pin on SST25VF020-20-4I-SAE-T enables hardware lock-down of the status register's Block-Protection-Lock (BPL) bit. When WP# is driven low, the BPL bit becomes read-only, preventing accidental or malicious modification of BP0/BP1 protection settings. This provides tamper-resistant configuration security - critical in medical and industrial applications. WP# has no effect on memory array writes unless BPL=1; it does not directly inhibit program/erase commands.
Is SST25VF020-20-4I-SAE-T still recommended for new designs?
No - Microchip explicitly marks SST25VF020-20-4I-SAE-T as "Not Recommended for New Designs" in DS25078A, advising migration to SST25VF020B. However, SST25VF020-20-4I-SAE-T remains fully supported for legacy design refresh, repair, and continuity programs. Its pinout, timing, and command set are identical to the B-version, ensuring drop-in compatibility where existing qualification and layout validation apply.
SST25VF020-20-4I-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:
- 20 MHz
- Write Cycle Time - Word, Page:
- 20µs
- Access Time:
- -
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
SST25VF020-20-4I-SAE-T FAQ
1.How can I place an order for SST25VF020-20-4I-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF020-20-4I-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 SST25VF020-20-4I-SAE-T reliable?
The price and inventory of SST25VF020-20-4I-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 SST25VF020-20-4I-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF020-20-4I-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF020-20-4I-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF020-20-4I-SAE-T?
SST25VF020-20-4I-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF020-20-4I-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 SST25VF020-20-4I-SAE-T?
For technical support, including SST25VF020-20-4I-SAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF020-20-4I-SAE-T requirements.
6.How does Aetrix verify that SST25VF020-20-4I-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF020-20-4I-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 SST25VF020-20-4I-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF020-20-4I-SAE-T?
All SST25VF020-20-4I-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF020-20-4I-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 SST25VF020-20-4I-SAE-T part is unused and in its original packaging.
Return procedure for SST25VF020-20-4I-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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