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Microchip Technology SST25VF020-20-4C-SAE
- Part No.:
- SST25VF020-20-4C-SAE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF020-20-4C-SAE.pdf
- Description:
- IC FLASH 2MBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:750
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Product details
Overview
SST25VF020-20-4C-SAE 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 up to 20 MHz clock frequency, delivers 100,000 program/erase cycles, and guarantees >100 years data retention - deployed in industrial control panels requiring nonvolatile configuration storage.
For engineers reviewing the SST25VF020-20-4C-SAE datasheet, SST25VF020-20-4C-SAE pinout, SST25VF020-20-4C-SAE application, or SST25VF020-20-4C-SAE equivalent, key selection criteria include SPI Mode 0/3 compatibility, SOIC-8 (150-mil) package footprint, sector/block erase flexibility, AAI programming efficiency, and hardware write protection via WP# and HOLD# pins.
Technical Context
The SST25VF020-20-4C-SAE implements a four-wire SPI interface (SCK, SI, SO, CE#) 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 (18 ms sector-erase, 70 ms chip-erase) and lower active current (7 mA typical) versus conventional NOR flash.
Internal operation relies on a software-managed status register (BUSY, WEL, BP0/BP1, BPL, AAI bits) and hardware control pins (WP#, HOLD#) to manage write enable state, block-level protection lock-down, and serial transaction suspension without chip deselection - critical for deterministic boot-time firmware loading and field-upgrade safety.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8-bit), organized as 64 uniform 4 KByte sectors or eight 32 KByte overlay blocks - enables granular firmware partitioning and OTA update staging. |
| Supply Voltage | 2.7–3.6 V single supply - compatible with 3.3 V logic domains and eliminates need for level-shifting in most MCU interfaces. |
| Max Clock Frequency | 20 MHz - supports high-throughput read access (up to ~2.5 MB/s theoretical) for XIP-capable boot loaders. |
| Endurance | 100,000 program/erase cycles (typical) - sufficient for frequent parameter logging or configuration updates in industrial HMI applications. |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unattended equipment like remote sensors or building automation controllers. |
| Active Read Current | 7 mA (typical) - minimizes power draw during firmware fetch operations in battery-backed or energy-harvested systems. |
| Standby Current | 8 µA (typical) - enables ultra-low-power sleep modes while preserving stored configuration across power cycles. |
Pinout & Package
Package: 8-lead SOIC, 150 mil body width (SAE suffix denotes this variant). RoHS-compliant, lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence - enables multi-device SPI bus sharing with daisy-chained or independent addressing. |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge latches input (SI), falling edge outputs data (SO) - supports both Mode 0 (SCK idle low) and Mode 3 (SCK idle high). |
| SI | Serial Data Input | Command, address, and data input path; MSB-first, synchronized to SCK rising edge - used for instruction opcodes (e.g., 03H for Read, 02H for Byte-Program). |
| SO | Serial Data Output | Read data and status register output path; driven on SCK falling edge - supports continuous read streaming until CE# deassertion. |
| WP# | Write Protect | Hardware-enables status register lock-down (BPL bit); when pulled low, prevents accidental modification of BP0/BP1 protection bits - critical for production firmware integrity. |
| HOLD# | Hold | Suspends ongoing SPI communication without resetting internal state or requiring CE# toggle - allows host MCU to service higher-priority interrupts mid-transfer. |
| VDD | Power Supply | 2.7–3.6 V main supply; decoupling capacitor required near pin to suppress switching noise during erase/write operations. |
| VSS | Ground | Reference return path; must be low-impedance connection to minimize ground bounce during high-current erase pulses. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission - enables efficient full-array firmware writes with only one initial address + sequential AFH commands. |
| Flexible Erase Architecture | Supports 4 KByte sector, 32 KByte block, and full-chip erase - allows selective reprogramming of application code sections without disturbing bootloader or calibration data. |
| Hardware Write Protection (WP#) | Physically gates status register modification - prevents runtime corruption of BP0/BP1 bits even if software fails, ensuring persistent protection of critical firmware regions. |
| Hold Function (HOLD#) | Pauses SPI transactions in-flight without losing address pointer or command context - eliminates need for complex state tracking during interrupt-driven host firmware. |
| SuperFlash Technology | Delivers 10× faster erase vs. standard NOR flash and lower energy per operation - extends battery life in portable diagnostics tools and reduces thermal stress in sealed enclosures. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage and boot-time execution source; provides deterministic read latency and robustness against voltage brownouts during startup. Use Value: 100-year data retention and -40°C to +85°C industrial temp range ensure firmware integrity over 15+ year product lifecycles without recalibration or replacement. |
Use Scenario: Holding calibrated sensor offsets, user preferences, and audit logs in portable ultrasound or infusion pump devices requiring FDA-compliant data persistence. IC Role / Device Role / Timing Role: Secure configuration register bank with hardware write-protection; retains settings across battery swaps and emergency power loss. Use Value: WP#-enabled BPL lock-down prevents unauthorized modification of calibration data, satisfying IEC 62304 traceability requirements for Class II medical electronics. |
| Automotive Body Control Module (BCM) | Smart Energy Meter Firmware |
Use Scenario: Storing lighting control algorithms and CAN message routing tables in automotive BCMs exposed to under-hood thermal cycling and EMI. IC Role / Device Role / Timing Role: SPI-bootable flash memory supporting XIP execution; integrates with MCU's QSPI controller for fast cold-start response. Use Value: 20 MHz max clock and 7 mA active current enable sub-100 ms boot time while meeting AEC-Q100 stress test margins for automotive qualification. |
Use Scenario: Hosting firmware images and tariff tables in ANSI C12.22-compliant smart meters deployed in utility substations with 20+ year field deployment expectations. IC Role / Device Role / Timing Role: Field-upgradable firmware repository with sector-erase granularity - isolates application code from secure boot loader during OTA updates. Use Value: 100,000-cycle endurance and >100-year retention meet ANSI C12.22 lifecycle validation requirements for revenue-grade metering infrastructure. |
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 W25X20CL | 2 Mbit density, 3.3 V supply, 20 MHz max clock, but lacks HOLD# pin and AAI programming mode - uses standard byte-program only. | No hardware suspend capability; requires full software state management during interrupt handling - less suitable for real-time deterministic systems. | Select W25X20CL only if HOLD# and AAI are unused and cost is primary driver; verify absence of hold functionality in host driver stack. |
| Macronix MX25L2006E | 2 Mbit, 3.3 V, 20 MHz, includes HOLD# and WP#, but uses different status register layout and lacks BPL lock-down bit - BP bits are always writable when WP# is high. | Cannot permanently lock protection bits; firmware updates may inadvertently disable write protection - increases risk in safety-critical deployments. | Prefer MX25L2006E for legacy designs already using Macronix toolchains; avoid where permanent block protection is mandated by system safety architecture. |
Compared with Winbond W25X20CL and Macronix MX25L2006E, the SST25VF020-20-4C-SAE uniquely combines hardware HOLD# suspend, AAI accelerated programming, and BPL-enabled irreversible status register lock-down - making it optimal for industrial and medical systems demanding deterministic timing and tamper-resistant configuration storage.
Availability
SST25VF020-20-4C-SAE is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive body electronics requiring stable component supply and long-term obsolescence management.
Supply support for SST25VF020-20-4C-SAE 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-SAE belongs to Microchip's legacy serial flash portfolio derived from Silicon Storage Technology (acquired 2010), engineered specifically for cost-sensitive, low-power embedded systems needing reliable nonvolatile storage with minimal board space.
FAQ
What is the operating temperature range for the SST25VF020-20-4C-SAE?
The SST25VF020-20-4C-SAE is rated for commercial (0°C to +70°C), industrial (-40°C to +85°C), and extended (-20°C to +85°C) temperature ranges. The "C" in the part number indicates commercial grade, but the device is fully specified across all three grades per DS25078A - actual qualification depends on final lot testing and packaging traceability.
Does the SST25VF020-20-4C-SAE support Quad SPI or Dual SPI modes?
No, the SST25VF020-20-4C-SAE supports only standard four-wire SPI (single I/O) in Mode 0 and Mode 3. It does not implement Dual Output, Dual Input, or Quad I/O protocols - confirmed by absence of IO2/IO3 pins and exclusive use of SI/SO signals in the pinout and instruction set.
Is the SST25VF020-20-4C-SAE pin-compatible with the newer SST25VF020B?
No, the SST25VF020-20-4C-SAE is not pin-compatible with SST25VF020B. While both share the same SOIC-8 package outline, the SST25VF020B introduces additional features including enhanced security registers and modified timing parameters - Microchip explicitly states "Not Recommended for New Designs" for SST25VF020-20-4C-SAE and advises migration to SST25VF020B with design review.
How does the HOLD# function behave during an active erase or program operation?
The HOLD# pin remains fully functional during erase or program operations: asserting HOLD# suspends the serial interface while preserving internal state (address pointer, command context, and BUSY status). SO enters high-impedance, but SI and SCK may be driven freely - allowing the host to service interrupts without aborting the ongoing flash operation.
What is the default block protection state of the SST25VF020-20-4C-SAE at power-up?
At power-up, the SST25VF020-20-4C-SAE defaults to full memory array protection (BP1=1, BP0=1, BPL=0), locking down the entire 2 Mbit space. This prevents accidental writes until the host executes WREN followed by WRSR with cleared BP bits - a safety feature critical for preventing corruption during early boot sequences.
SST25VF020-20-4C-SAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for SST25VF020-20-4C-SAE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF020-20-4C-SAE 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 reliable?
The price and inventory of SST25VF020-20-4C-SAE 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 is usually 5 days.
3.What payment methods are accepted for SST25VF020-20-4C-SAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF020-20-4C-SAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF020-20-4C-SAE?
SST25VF020-20-4C-SAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF020-20-4C-SAE 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?
For technical support, including SST25VF020-20-4C-SAE 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 requirements.
6.How does Aetrix verify that SST25VF020-20-4C-SAE is sourced from the original manufacturer or authorized distributors?
All SST25VF020-20-4C-SAE 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 meets industry standards.
7.What is the process for return or replacement of SST25VF020-20-4C-SAE?
All SST25VF020-20-4C-SAE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF020-20-4C-SAE, 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 part is unused and in its original packaging.
Return procedure for SST25VF020-20-4C-SAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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