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Microchip Technology SST25VF040B-50-4I-S2AF-T
- Part No.:
- SST25VF040B-50-4I-S2AF-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25VF040B-50-4I-S2AF-T.pdf
- Description:
- IC FLASH 4MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,489
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Product details
Overview
SST25VF040B-50-4I-S2AF-T from Microchip Technology is a 4-Mbit SPI serial Flash memory IC designed for embedded code storage and data logging in resource-constrained systems. It operates from a single 2.7V–3.6V supply, supports up to 50 MHz clock frequency, delivers 100,000 program/erase cycles endurance, and retains data for >100 years. It is used in industrial microcontroller boot code storage where low-power, sector-level erase flexibility, and SPI compatibility are required.
For engineers reviewing the SST25VF040B-50-4I-S2AF-T datasheet, SST25VF040B-50-4I-S2AF-T pinout, SST25VF040B-50-4I-S2AF-T application, or SST25VF040B-50-4I-S2AF-T equivalent, key selection considerations include its 8-pin SOIC (208 mil) package, dual SPI modes (0 and 3), Auto Address Increment (AAI) programming, hardware RY/BY# status via SO pin during AAI, and software/hardware write protection with block lock-down capability.
Technical Context
The SST25VF040B-50-4I-S2AF-T implements a four-wire SPI interface with CE#, SCK, SI, and SO signals, supporting both Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). Its SuperFlash® technology uses split-gate cells and thick-oxide tunneling for enhanced reliability over conventional NOR Flash.
It features dual erase granularity-uniform 4-Kbyte sectors and overlay 32-Kbyte/64-Kbyte blocks-and supports high-speed read at 50 MHz using the 0BH command with dummy cycle. The HOLD# and WP# pins provide hardware suspend and write-lock control independent of software status register settings.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes), organized as uniform 4-Kbyte sectors |
| Supply Voltage | 2.7V–3.6V - enables direct interfacing with 3.3V logic without level shifters |
| Max Clock Frequency | 50 MHz - supports high-throughput firmware updates and boot loading |
| Endurance | 100,000 program/erase cycles - suitable for field-upgradable firmware with frequent rewrites |
| Data Retention | >100 years - ensures long-term reliability in unattended industrial deployments |
| Active Read Current | 10 mA (typical) - minimizes power draw during active code execution from Flash |
| Standby Current | 5 µA (typical) - enables ultra-low-power sleep modes in battery-backed systems |
| Erase Time (Sector) | 18 ms (typical) - allows rapid partial reconfiguration without full chip erase overhead |
Pinout & Package
Package: 8-lead SOIC (208 mil), surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence to prevent premature termination |
| SO | Serial Data Output / RY/BY# | Outputs data on falling SCK edge; reconfigurable as ready/busy indicator during AAI mode via EBSY/DBSY commands |
| WP# | Write-Protect Control | Enables/disables STATUS register lock-down (BPL bit); low = BPL functional, high = BPL ignored |
| VSS | Ground Reference | System common return path; decoupling capacitor required near VDD/VSS pair |
| VDD | Power Supply | 2.7V–3.6V input; requires local 0.1 µF ceramic bypass capacitor |
| HOLD# | Serial Interface Suspend | Pauses ongoing SPI transaction without deselecting device or resetting internal state |
| SCK | Serial Clock Input | Timing reference for all I/O; rising edge latches SI, falling edge outputs SO |
| SI | Serial Data Input | Accepts opcodes, addresses, and data MSb-first; sampled on rising SCK edge |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces multi-byte programming time by eliminating repeated address transmission per word |
| Hardware RY/BY# via SO Pin | Eliminates software polling overhead during AAI by enabling real-time busy status on SO |
| Flexible Block Protection | Four BP bits + BPL enable configurable, persistent protection of upper 1/16 to full 4-Mbit array |
| Dual SPI Modes (0 & 3) | Ensures interoperability with diverse host controllers including legacy and modern MCU SPI peripherals |
| Uniform Erase Architecture | Supports precise firmware patching via 4-Kbyte sectors or bulk updates via 64-Kbyte blocks |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing and executing boot firmware and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile code storage with fast read access and robust sector erase for field updates. Use Value: 50 MHz high-speed read enables sub-100 ms boot times; 100-year data retention ensures firmware integrity over equipment lifetime. | Use Scenario: Holding certified bootloader and safety-critical application code in portable diagnostic instruments requiring regulatory compliance. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage with hardware write-protection (WP#) and lock-down capable STATUS register. Use Value: BPL-enabled block protection prevents accidental overwrite of validated firmware sections during service updates. |
| Smart Energy Meter Data Logging | Automotive Body Control Module |
Use Scenario: Recording time-stamped energy consumption metrics in utility meters with limited power budget and long deployment cycles. IC Role / Device Role / Timing Role: Low-power data logger with 5 µA standby current and 4-Kbyte sector erase for cyclic buffer management. Use Value: 100,000-cycle endurance supports daily logging for >27 years; 4-Kbyte granularity avoids erasing unrelated telemetry data. | Use Scenario: Storing calibration tables and feature-enable flags in body control units exposed to automotive temperature extremes. IC Role / Device Role / Timing Role: Industrial-grade (-40°C to +85°C) non-volatile memory with deterministic erase timing for OTA update rollback. Use Value: 18 ms sector erase and 35 ms chip erase enable fast, verified recovery paths during firmware validation failures. |
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, 3.3V, 75 MHz max clock, 100 µA standby current, no HOLD# pin | Lacks hardware suspend capability; higher standby power limits battery use | Select when maximum read speed is critical and suspend functionality is unnecessary |
| W25Q40EWUXIE | 4-Mbit, 1.8V/3.3V dual supply, 104 MHz DTR mode, Quad SPI support, 25 µA standby | Supports QPI and DTR for higher bandwidth; requires different command set and layout | Select for next-gen designs needing scalable interface and lower voltage operation |
Compared with AT25DF041A-SSH-T and W25Q40EWUXIE, the SST25VF040B-50-4I-S2AF-T offers balanced performance with integrated HOLD# and WP# pins, industry-standard SPI modes, and ultra-low 5 µA standby - making it optimal for cost-sensitive, power-constrained industrial controllers where pin count and simplicity are prioritized over quad-speed or dual-voltage flexibility.
Availability
SST25VF040B-50-4I-S2AF-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code, smart energy meter data logging, and automotive body control module applications requiring stable component supply across extended product lifecycles.
Supply support for SST25VF040B-50-4I-S2AF-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 for industrial, automotive, and consumer markets.
The SST25VF040B-50-4I-S2AF-T belongs to Microchip's 25-series Serial Flash family, engineered for reliable, low-power, SPI-based code and data storage in space-constrained embedded systems.
FAQ
What is the operating temperature range for the SST25VF040B-50-4I-S2AF-T?
The SST25VF040B-50-4I-S2AF-T is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the official Microchip datasheet DS20005051E, ensuring reliable performance in demanding environments such as factory automation and outdoor metering systems. The "I" suffix in the part number explicitly denotes industrial grade, distinguishing it from commercial-grade variants.
Does the SST25VF040B-50-4I-S2AF-T support both SPI Mode 0 and Mode 3?
Yes, the SST25VF040B-50-4I-S2AF-T fully supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as documented in Section 4.0 of the DS20005051E datasheet. This dual-mode compatibility allows seamless integration with a wide range of microcontrollers and FPGAs without requiring clock polarity or phase reconfiguration in the host driver.
How does the HOLD# pin function on the SST25VF040B-50-4I-S2AF-T?
The HOLD# pin on the SST25VF040B-50-4I-S2AF-T suspends an ongoing 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 - enabling the host to service higher-priority interrupts before resuming communication. This behavior is defined in Section 4.1 of the official datasheet.
What erase granularities does the SST25VF040B-50-4I-S2AF-T support?
The SST25VF040B-50-4I-S2AF-T supports three erase granularities: uniform 4-Kbyte sectors, 32-Kbyte overlay blocks, and 64-Kbyte overlay blocks. Each is accessed via dedicated opcodes (20H, 52H, D8H respectively), allowing precise firmware patching or bulk reprogramming without affecting unrelated memory regions - a capability verified in Table 5-1 and Section 3.0 of DS20005051E.
Can the SST25VF040B-50-4I-S2AF-T be used with a 1.8V host interface?
No, the SST25VF040B-50-4I-S2AF-T requires a 2.7V–3.6V supply and is not 1.8V I/O compatible. Its SI, SO, SCK, CE#, WP#, and HOLD# pins are specified for 3.3V logic levels only. Interfacing with 1.8V hosts requires external level-shifting circuitry, as confirmed by the Absolute Maximum Ratings and DC Characteristics tables in DS20005051E.
SST25VF040B-50-4I-S2AF-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 50 MHz
- Write Cycle Time - Word, Page:
- 10µs
- 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
SST25VF040B-50-4I-S2AF-T FAQ
1.How can I place an order for SST25VF040B-50-4I-S2AF-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-50-4I-S2AF-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 SST25VF040B-50-4I-S2AF-T reliable?
The price and inventory of SST25VF040B-50-4I-S2AF-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25VF040B-50-4I-S2AF-T is usually 5 days.
3.What payment methods are accepted for SST25VF040B-50-4I-S2AF-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-50-4I-S2AF-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-50-4I-S2AF-T?
SST25VF040B-50-4I-S2AF-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-50-4I-S2AF-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 SST25VF040B-50-4I-S2AF-T?
For technical support, including SST25VF040B-50-4I-S2AF-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF040B-50-4I-S2AF-T requirements.
6.How does Aetrix verify that SST25VF040B-50-4I-S2AF-T is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-50-4I-S2AF-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 SST25VF040B-50-4I-S2AF-T meets industry standards.
7.What is the process for return or replacement of SST25VF040B-50-4I-S2AF-T?
All SST25VF040B-50-4I-S2AF-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-50-4I-S2AF-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 SST25VF040B-50-4I-S2AF-T part is unused and in its original packaging.
Return procedure for SST25VF040B-50-4I-S2AF-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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