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Microchip Technology SST25VF512-20-4C-SAE-T
- Part No.:
- SST25VF512-20-4C-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF512-20-4C-SAE-T.pdf
- Description:
- IC FLASH 512KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SST25VF512-20-4C-SAE-T from Microchip Technology is a 512 Kbit SPI serial flash memory IC designed for embedded firmware storage, boot code retention, and configuration data in space-constrained systems. It operates at 2.7–3.6 V, supports up to 20 MHz 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 controllers and IoT edge nodes.
For engineers reviewing the SST25VF512-20-4C-SAE-T datasheet, SST25VF512-20-4C-SAE-T pinout, SST25VF512-20-4C-SAE-T application, or SST25VF512-20-4C-SAE-T equivalent, key selection considerations include its SOIC-8 package compatibility, SPI Mode 0/3 support, hardware HOLD#/WP# pins for real-time command suspension and block-level write protection, and Auto Address Increment (AAI) programming for accelerated sequential writes.
Technical Context
The SST25VF512-20-4C-SAE-T implements a four-wire SPI interface (SCK, SI, SO, CE#) with dual-mode timing (Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors 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 status register with BUSY, WEL, BP0/BP1, AAI, and BPL bits - supporting dynamic write-enable control, configurable block protection (0–100% memory area), and lock-down capability via WP# pin. The HOLD# pin suspends ongoing serial transfers without resetting internal state, preserving SCK phase alignment during multi-master arbitration or low-power transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64 KByte), organized as sixteen 4 KByte sectors or two 32 KByte overlay blocks - enables granular firmware updates without full chip erase. |
| Supply Voltage | 2.7–3.6 V single supply - compatible with 3.3 V logic domains and eliminates need for level shifters in most microcontroller interfaces. |
| Max Clock Frequency | 20 MHz - supports high-throughput read/write operations; achieves ~2.5 MB/s theoretical read bandwidth using continuous mode. |
| Endurance | 100,000 program/erase cycles (typical) - sufficient for field-upgradable firmware with frequent minor revisions over 10+ year product lifecycles. |
| Data Retention | >100 years at +25°C - ensures long-term reliability of calibration data, security keys, and device identity stored in nonvolatile memory. |
| Active Read Current | 7 mA (typical) - minimizes power draw during boot sequence or configuration loading in battery-powered edge devices. |
| Standby Current | 8 µA (typical) - enables ultra-low-power sleep modes while retaining memory contents across system power cycles. |
Pinout & Package
Package: 8-lead SOIC (4.9 mm × 6.0 mm), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low selection signal; must remain low throughout command execution; high-to-low transition initiates instruction decoding. |
| SO | Serial Data Output | Tri-state output driven on falling edge of SCK; provides read data, status register contents, or ID bytes depending on instruction. |
| WP# | Write Protect | Hardware-enables lock-down of Block-Protection bits (BP1/BP0/BPL); when low, prevents accidental status register modification. |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance connection to PCB ground plane. |
| VDD | Power Supply | 2.7–3.6 V input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stable operation during fast transitions. |
| HOLD# | Hold Control | Suspends ongoing SPI transfer without deselecting device; preserves internal address pointer and clock phase alignment. |
| SCK | Serial Clock | Master-generated timing signal; rising edge latches input (SI), falling edge clocks output (SO); supports Mode 0 (idle low) and Mode 3 (idle high). |
| SI | Serial Data Input | Command opcodes, addresses, and program data accepted on rising edge of SCK; MSB-first protocol per SPI standard. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission - enables sequential byte writes with single AFH command per byte after initial setup. |
| Flexible Erase Architecture | Supports sector-erase (4 KByte), block-erase (32 KByte), and chip-erase - allows optimal trade-off between update granularity and speed in firmware partitioning schemes. |
| Hardware Write Protection | WP# pin directly controls lock-down of status register BP bits - prevents corruption of protection settings during brown-out or ESD events. |
| HOLD# Pin Functionality | Pauses SPI communication mid-transfer without resetting internal state - essential for deterministic timing in real-time systems sharing SPI bus with multiple peripherals. |
| SuperFlash Technology | Delivers lower energy per program/erase cycle vs. standard NOR flash due to reduced current and shorter timing - extends battery life in portable applications. |
Applications
| Industrial PLC Firmware Storage | IoT Sensor Node Configuration |
|---|---|
Use Scenario: Storing boot loader, application firmware, and field-upgrade images in programmable logic controllers operating in harsh environments with wide temperature ranges. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast random-access read and reliable sector-based overwrite - accessed during cold start and OTA update sequences. Use Value: 100,000 endurance cycles and >100-year data retention ensure firmware integrity across decades of unattended operation in factory automation systems. |
Use Scenario: Holding sensor calibration coefficients, network credentials, and device-specific parameters in battery-powered environmental monitors deployed outdoors. IC Role / Device Role / Timing Role: Low-power configuration memory accessed infrequently but requiring guaranteed retention during multi-year deployments without maintenance. Use Value: 8 µA standby current and 2.7 V minimum supply enable operation down to near-end-of-battery voltage, extending usable life in coin-cell or energy-harvesting designs. |
| Medical Diagnostic Equipment Boot Memory | Automotive Body Control Module (BCM) Settings |
Use Scenario: Securely storing boot code and regulatory-compliant diagnostic algorithms in portable ultrasound or ECG devices subject to IEC 62304 requirements. IC Role / Device Role / Timing Role: Trusted boot source verified at power-on reset; supports cryptographic signature checks before executing loaded firmware. Use Value: Hardware WP# and status register lock-down prevent unauthorized modification of critical boot assets - meeting functional safety requirements for Class II medical devices. |
Use Scenario: Retaining user preferences (seat position, mirror angle), fault logs, and adaptive learning data in automotive BCMs exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: Robust nonvolatile parameter storage interfaced via SPI from MCU; accessed during ignition-on initialization and periodic background logging. Use Value: SOIC-8 package withstands automotive-grade reflow profiles; 100,000-cycle endurance supports daily recalibration and event logging over 15-year vehicle lifetime. |
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 |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit density, 85 MHz max clock, deeper power-down mode (3 µA), no HOLD# pin | Better suited for high-bandwidth firmware streaming; lacks hardware suspend capability for time-critical SPI arbitration | Select when higher capacity and faster read throughput are prioritized over deterministic hold functionality. |
| W25Q80DVSSIG | 8 Mbit density, 104 MHz max clock, Quad SPI support, built-in 256-byte buffer, no WP#/HOLD# dedicated pins (shared with IO2/IO3) | Enables faster quad-read modes and larger firmware images; requires software-managed protection and hold emulation | Choose for cost-sensitive consumer electronics where quad interface and larger memory reduce BOM count, accepting software complexity for protection. |
Compared with AT25DF041A-SSH-T and W25Q80DVSSIG, the SST25VF512-20-4C-SAE-T offers deterministic hardware HOLD# and WP# control ideal for real-time systems, lower voltage operation (2.7 V min), and proven long-term reliability in industrial deployments - at the expense of density and peak bandwidth.
Availability
SST25VF512-20-4C-SAE-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT sensor nodes, medical diagnostic equipment, and automotive body control modules requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SST25VF512-20-4C-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 specializing in microcontrollers, analog devices, and memory solutions, with leadership in embedded control and secure connectivity.
The SST25VF512-20-4C-SAE-T belongs to Microchip's legacy SST serial flash family, engineered for cost-effective, reliable nonvolatile storage in resource-constrained embedded systems where predictable timing, low power, and long-term data integrity are critical.
FAQ
What is the maximum clock frequency supported by the SST25VF512-20-4C-SAE-T?
The SST25VF512-20-4C-SAE-T supports a maximum serial clock frequency of 20 MHz under standard operating conditions (2.7–3.6 V, -40°C to +85°C). This rating applies to both read and write operations and is validated across the full industrial temperature range. Exceeding this frequency may result in unreliable data capture on SI or corrupted SO output due to timing violations in the internal interface logic of the SST25VF512-20-4C-SAE-T.
Does the SST25VF512-20-4C-SAE-T support SPI Mode 0 and Mode 3 simultaneously?
Yes, the SST25VF512-20-4C-SAE-T natively supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1) without hardware reconfiguration. The device detects the idle state of SCK at initialization and adapts its sampling and driving edges accordingly - rising edge for SI latching and falling edge for SO shifting in both modes. This dual-mode compatibility ensures seamless integration with diverse host MCUs in the SST25VF512-20-4C-SAE-T design.
How does the HOLD# pin function during an active SST25VF512-20-4C-SAE-T read operation?
During an active read operation, asserting HOLD# (driving it low while CE# remains low) places the SST25VF512-20-4C-SAE-T into hold mode: SO enters high-impedance, SI and SCK become don't-care inputs, and the internal address pointer freezes. Communication resumes immediately upon deasserting HOLD# (high) while maintaining CE# low - no retransmission of command or address is needed. This behavior is fully specified in the DS25076A datasheet for the SST25VF512-20-4C-SAE-T.
What is the purpose of the Auto Address Increment (AAI) feature in the SST25VF512-20-4C-SAE-T?
The Auto Address Increment (AAI) feature in the SST25VF512-20-4C-SAE-T reduces total programming time for sequential data by eliminating the need to resend the full 24-bit address for each byte. After the initial AFH command and address, subsequent bytes are written using only the AFH opcode followed by data - the internal address pointer auto-increments. This accelerates firmware image loading and is especially valuable in systems where the SST25VF512-20-4C-SAE-T serves as primary boot memory.
Can the SST25VF512-20-4C-SAE-T be used in automotive applications?
The SST25VF512-20-4C-SAE-T is qualified for industrial temperature range (-40°C to +85°C) and meets AEC-Q200 stress test requirements for passive components, but it is not officially AEC-Q100 qualified as an integrated circuit. While widely deployed in automotive body control modules and infotainment subsystems, designers must perform full system-level qualification per ISO/TS 16949 for safety-critical functions. The SST25VF512-20-4C-SAE-T's robustness, 100-year data retention, and hardware write protection make it suitable for non-safety automotive applications with proper validation.
SST25VF512-20-4C-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:
- 512Kbit
- Memory Organization:
- 64K 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
SST25VF512-20-4C-SAE-T FAQ
1.How can I place an order for SST25VF512-20-4C-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF512-20-4C-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 SST25VF512-20-4C-SAE-T reliable?
The price and inventory of SST25VF512-20-4C-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 SST25VF512-20-4C-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF512-20-4C-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF512-20-4C-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF512-20-4C-SAE-T?
SST25VF512-20-4C-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF512-20-4C-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 SST25VF512-20-4C-SAE-T?
For technical support, including SST25VF512-20-4C-SAE-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF512-20-4C-SAE-T requirements.
6.How does Aetrix verify that SST25VF512-20-4C-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF512-20-4C-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 SST25VF512-20-4C-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF512-20-4C-SAE-T?
All SST25VF512-20-4C-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF512-20-4C-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 SST25VF512-20-4C-SAE-T part is unused and in its original packaging.
Return procedure for SST25VF512-20-4C-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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