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Microchip Technology SST25VF040B-50-4I-S2AE
- Part No.:
- SST25VF040B-50-4I-S2AE
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SST25VF040B-50-4I-S2AE.pdf
- Description:
- IC FLASH 4MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,964
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Product details
Overview
SST25VF040B-50-4I-S2AE from Microchip Technology is a 4-Mbit SPI serial Flash memory IC with single-supply operation (2.7V–3.6V), SPI Mode 0/3 compatibility, 50 MHz max clock frequency, 100,000 program/erase cycles endurance, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile code/data storage in microcontroller boot loaders, firmware update buffers, and configuration memory for embedded systems.
For engineers reviewing the SST25VF040B-50-4I-S2AE datasheet, SST25VF040B-50-4I-S2AE pinout, SST25VF040B-50-4I-S2AE application, or SST25VF040B-50-4I-S2AE equivalent, key selection criteria include sector/block erase granularity (4/32/64 Kbyte), Auto Address Increment (AAI) programming support, hardware RY/BY# status via SO pin during AAI, HOLD#/WP# control logic, and RoHS-compliant 8-lead SOIC (208 mil) packaging.
Technical Context
The SST25VF040B-50-4I-S2AE implements a four-wire SPI interface with dual-mode clock polarity (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/35 ms chip) and lower active current (10 mA typical) versus conventional NOR Flash.
Internal architecture includes a software-accessible STATUS register with BUSY, WEL, BP0–BP3, AAI, and BPL bits; hardware-assisted write protection via WP# and HOLD# pins; and dual end-of-write detection-software polling of BUSY or hardware RY/BY# output on SO during AAI programming using EBSY/DBSY commands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbyte), organized as uniform 4-Kbyte sectors, 32-Kbyte and 64-Kbyte overlay blocks |
| Supply Voltage | 2.7V–3.6V single supply - enables direct interfacing with 3.3V logic without level shifting |
| Max Clock Frequency | 50 MHz - supports high-speed High-Speed Read (0BH) with dummy cycle for throughput-critical firmware fetch |
| Endurance | 100,000 program/erase cycles - sufficient for field firmware updates over 10+ years in industrial deployments |
| Data Retention | >100 years - ensures long-term reliability of stored calibration data or security keys |
| Erase Times | Sector/Block: 18 ms typ; Chip: 35 ms typ - reduces firmware update latency vs. legacy serial Flash |
| Active Read Current | 10 mA typ at 50 MHz - minimizes power budget impact during burst reads in battery-backed systems |
| Standby Current | 5 µA typ - supports ultra-low-power sleep modes in always-on edge devices |
Pinout & Package
Package: 8-lead SOIC (208 mil), RoHS-compliant, surface-mountable with standard reflow profile.
| 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 latch |
| SO | Serial Data Output / RY/BY# | Outputs data on falling SCK edge; reconfigurable as ready/busy indicator during AAI mode via EBSY command |
| WP# | Write-Protect Input | Enables/disables STATUS register lock-down (BPL bit); controls software block protection activation |
| VSS | Ground | Reference return path for all I/O and core circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.7V–3.6V supply input; decoupling capacitor (0.1 µF) required near pin per layout guidelines |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; preserves internal address pointer and state |
| SCK | Serial Clock | Provides timing reference; rising edge latches SI, falling edge outputs SO; supports Mode 0 (idle low) and Mode 3 (idle high) |
| 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 - critical for fast firmware patching |
| Hardware RY/BY# Status on SO Pin | Eliminates software polling overhead during AAI; SO becomes dedicated busy indicator after EBSY command |
| Flexible Block Protection Scheme | Configurable via STATUS register (BP0–BP3) to protect upper 1/16 to full array - enables secure bootloader partitioning |
| Uniform Erase Granularity | Independent 4-Kbyte sector, 32-Kbyte block, and 64-Kbyte block erase - optimizes wear leveling and update efficiency |
| SuperFlash® Technology | Delivers 3× faster erase vs. standard NOR Flash and 50% lower energy per operation - extends battery life in portable systems |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing firmware images and runtime parameters in programmable logic controllers deployed in factory automation environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast read access and robust erase/write cycling under thermal stress. Use Value: 100,000-cycle endurance and –40°C to +85°C rating ensure reliable operation across decades of industrial duty cycles. | Use Scenario: Holding calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment requiring traceable data integrity. IC Role / Device Role / Timing Role: Secure, long-retention configuration memory with software/hardware write protection to prevent accidental corruption. Use Value: Block protection bits (BP0–BP3) and WP#-enabled BPL lock-down prevent unauthorized modification of safety-critical settings. |
| Automotive Infotainment Boot Loader | IoT Edge Node OTA Update Buffer |
Use Scenario: Hosting primary boot code and recovery image for head unit microcontrollers, where rapid startup and fail-safe recovery are mandatory. IC Role / Device Role / Timing Role: Fast-read, high-reliability boot memory supporting High-Speed Read (0BH) at 50 MHz for sub-100ms boot times. Use Value: 50 MHz clock support and wrap-around addressing enable continuous streaming of boot code without address boundary stalls. | Use Scenario: Caching firmware delta patches prior to atomic flash update in battery-powered wireless sensors with constrained bandwidth. IC Role / Device Role / Timing Role: Low-power, high-endurance update staging area leveraging AAI programming and sector-erase flexibility. Use Value: 5 µA standby current and 18 ms sector erase minimize energy consumption during over-the-air update preparation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4 Mbit, 3.3V, 75 MHz max clock, 100,000 cycles, but lacks HOLD# pin and AAI programming | Higher speed but no hardware suspend capability; less suitable for real-time interrupt-driven firmware updates | Select when maximum read throughput is prioritized over transaction suspension and efficient multi-byte writes |
| W25Q40EWUXIE | 4 Mbit, 1.8V/3.3V dual supply, 104 MHz DTR mode, Quad SPI support, but requires different command set and layout | Enables faster random access via Quad I/O, yet increases driver complexity and PCB routing density | Select when migrating to higher-density families or requiring future scalability to 8/16 Mbit Quad SPI variants |
Compared with AT25DF041A-SSH-T and W25Q40EWUXIE, the SST25VF040B-50-4I-S2AE uniquely balances industrial-grade reliability, hardware HOLD#/WP# control, and AAI programming efficiency - making it optimal for cost-sensitive, thermally demanding embedded systems where deterministic update latency matters.
Availability
SST25VF040B-50-4I-S2AE is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device configuration memory, and automotive infotainment boot loader applications requiring stable component supply and long-term lifecycle support.
Supply support for SST25VF040B-50-4I-S2AE 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 Inc. is a leading provider of microcontrollers, analog components, and Flash memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The SST25VF040B-50-4I-S2AE belongs to Microchip's 25-series Serial Flash family, engineered specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power, SPI-compatible nonvolatile storage with industrial temperature tolerance.
FAQ
What is the operating voltage range for the SST25VF040B-50-4I-S2AE?
The SST25VF040B-50-4I-S2AE operates from a single supply of 2.7V to 3.6V. This range aligns with standard 3.3V logic systems and eliminates the need for external voltage translation. Operation outside this window may result in undefined behavior or data corruption. The SST25VF040B-50-4I-S2AE datasheet specifies that VDD must remain within these limits during all read, program, and erase operations.
Does the SST25VF040B-50-4I-S2AE support both SPI Mode 0 and Mode 3?
Yes, the SST25VF040B-50-4I-S2AE supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. This dual-mode compatibility allows seamless integration with a broad range of microcontrollers and FPGAs without requiring hardware modifications. The SST25VF040B-50-4I-S2AE automatically adapts based on the host's clock idle state and sampling edge configuration.
How does the HOLD# pin function on the SST25VF040B-50-4I-S2AE?
The HOLD# pin on the SST25VF040B-50-4I-S2AE 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 - preserving the address pointer and command context. This enables priority interrupt handling in real-time systems. The SST25VF040B-50-4I-S2AE resumes communication upon HOLD# deassertion and continued CE# assertion.
What erase granularities does the SST25VF040B-50-4I-S2AE support?
The SST25VF040B-50-4I-S2AE supports three independent erase granularities: uniform 4-Kbyte sectors, 32-Kbyte overlay blocks, and 64-Kbyte overlay blocks. Each is executed via distinct opcodes (20H, 52H, D8H) and uses different address-bit significance (A12, A15, A16 respectively). This flexibility allows precise wear leveling and minimizes unnecessary erasure during partial firmware updates. The SST25VF040B-50-4I-S2AE does not support page or byte-level erase.
Can the SST25VF040B-50-4I-S2AE be used in industrial temperature environments?
Yes, the SST25VF040B-50-4I-S2AE is rated for the industrial temperature range of –40°C to +85°C, as explicitly stated in its datasheet. This makes it suitable for deployment in harsh environments such as factory floors, outdoor infrastructure, and automotive under-hood modules. The SST25VF040B-50-4I-S2AE maintains full specification compliance-including endurance, retention, and timing-across this entire range.
SST25VF040B-50-4I-S2AE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-S2AE FAQ
1.How can I place an order for SST25VF040B-50-4I-S2AE through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-50-4I-S2AE 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-S2AE reliable?
The price and inventory of SST25VF040B-50-4I-S2AE 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-S2AE is usually 5 days.
3.What payment methods are accepted for SST25VF040B-50-4I-S2AE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-50-4I-S2AE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-50-4I-S2AE?
SST25VF040B-50-4I-S2AE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-50-4I-S2AE 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-S2AE?
For technical support, including SST25VF040B-50-4I-S2AE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25VF040B-50-4I-S2AE requirements.
6.How does Aetrix verify that SST25VF040B-50-4I-S2AE is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-50-4I-S2AE 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-S2AE meets industry standards.
7.What is the process for return or replacement of SST25VF040B-50-4I-S2AE?
All SST25VF040B-50-4I-S2AE units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-50-4I-S2AE, 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-S2AE part is unused and in its original packaging.
Return procedure for SST25VF040B-50-4I-S2AE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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