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Microchip Technology SST25VF040B-50-4I-QAE-T
- Part No.:
- SST25VF040B-50-4I-QAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25VF040B-50-4I-QAE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 50MHZ 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
SST25VF040B-50-4I-QAE-T from Microchip Technology is a 4-Mbit SPI serial Flash memory IC with single-supply operation (2.7V–3.6V), 50 MHz max clock frequency, uniform 4-Kbyte sector/32-Kbyte & 64-Kbyte block erase architecture, and industrial temperature range (–40°C to +85°C). It serves as nonvolatile program/data storage in microcontroller boot loaders, firmware update buffers, and embedded configuration memory.
For engineers reviewing the SST25VF040B-50-4I-QAE-T datasheet, SST25VF040B-50-4I-QAE-T pinout, SST25VF040B-50-4I-QAE-T application, or SST25VF040B-50-4I-QAE-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, Auto Address Increment (AAI) programming support, hardware RY/BY# status on SO during AAI, HOLD#/WP# functional pin behavior, and verified 100,000-cycle endurance with >100-year data retention.
Technical Context
This device implements a four-wire SPI interface with dual-mode clock polarity support (Mode 0 and Mode 3), enabling interoperability with diverse host controllers. Its SuperFlash® split-gate CMOS technology delivers faster erase times (18 ms sector/block, 35 ms chip) and lower active current (10 mA typical) versus conventional NOR Flash.
The internal architecture includes dedicated I/O buffers, X/Y decoders, and control logic managing byte/word programming, sector/block/chip erase, and STATUS register access. End-of-write detection is supported via software polling of BUSY bit or hardware RY/BY# output on SO during AAI mode-enabled by EBSY (70H) command and disabled by DBSY (80H).
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 single supply-enables direct interfacing with 3.3V logic without level shifting |
| Max Clock Frequency | 50 MHz (High-Speed Read)-reduces instruction latency and improves throughput vs. 25 MHz standard Read |
| Endurance | 100,000 program/erase cycles-supports frequent firmware updates in field-deployed devices |
| Data Retention | >100 years at 25°C-ensures long-term reliability for unattended embedded systems |
| Erase Time (typ.) | 18 ms (sector/block), 35 ms (chip)-minimizes downtime during field upgrades |
| Active Read Current | 10 mA typical at 50 MHz-low power draw enables battery-backed or energy-constrained designs |
| Standby Current | 5 µA typical-critical for low-power sleep modes in IoT edge nodes |
Pinout & Package
Package: 8-contact WSON (6 mm × 5 mm), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; high-to-low transition initiates operation |
| 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); determines write protection granularity via BP3–BP0 bits |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.7V–3.6V input; bypass capacitor (0.1 µF) required near pin for noise suppression |
| HOLD# | Serial Interface Suspend | Pauses ongoing SPI transaction without resetting internal state; requires CE# low and synchronized SCK edge |
| SCK | Serial Clock | Timing reference for SI/SO; supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI | Serial Data Input | Accepts opcodes, addresses, and data on rising SCK edge; MSb-first protocol |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time for sequential writes by eliminating repeated address transmission-critical for firmware patching |
| Hardware RY/BY# on SO Pin | Eliminates software polling overhead during AAI; SO outputs real-time busy status when enabled via EBSY (70H) command |
| Flexible Block Protection | Configurable via STATUS register BP3–BP0 bits to protect upper 1/16 to full 4-Mbit array-prevents accidental overwrite of bootloader or calibration data |
| HOLD# Functionality | Allows temporary suspension of SPI communication without losing internal address pointer or command context-essential for multi-master arbitration |
| SuperFlash® Technology | Delivers 3× faster erase and lower program current vs. standard NOR Flash-extends battery life and reduces thermal load |
Applications
| Bootloader Storage | Firmware Update Buffer |
|---|---|
Use Scenario: Stores primary bootloader code executed at MCU power-on reset in industrial PLCs and medical diagnostics equipment. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic startup timing and secure execution environment. Use Value: 100,000-cycle endurance ensures reliable field updates over 10+ years; hardware RY/BY# enables zero-latency status feedback during bootloader validation. | Use Scenario: Holds staged firmware images prior to atomic swap in connected gateways and smart metering endpoints. IC Role / Device Role / Timing Role: Dual-bank-capable serial Flash supporting background download and verified commit. Use Value: AAI programming cuts image write time by ~40% vs. byte-program mode; 5 µA standby current preserves battery charge during idle periods. |
| Configuration Parameter Storage | Calibration Data Repository |
Use Scenario: Retains user-defined settings (network credentials, sensor thresholds) across power cycles in HVAC controllers and building automation panels. IC Role / Device Role / Timing Role: Secure, software-write-protected memory partitioned via BP bits to prevent corruption. Use Value: Block protection lock-down (BPL) prevents unauthorized modification after factory commissioning; >100-year retention guarantees data integrity over product lifetime. | Use Scenario: Stores factory-calibrated coefficients for precision ADCs and analog front-ends in test equipment and instrumentation. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage accessed only during initialization or recalibration routines. Use Value: Uniform 4-Kbyte sector erase allows selective reprogramming of calibration blocks without disturbing application code; industrial temp range ensures stability in lab environments. |
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 SPI Flash; 85 MHz max clock; 2.7V–3.6V; no HOLD# pin; different STATUS register layout | Lacks HOLD# functionality-unsuitable for multi-master SPI bus arbitration | Select when higher-speed read is prioritized and HOLD# is not required |
| W25Q40EWUXIE | 4-Mbit SPI Flash; 104 MHz max clock; 1.65V–1.95V/2.7V–3.6V dual supply; Quad SPI support; different pinout | Supports QPI mode for 4x throughput but requires modified driver stack and PCB layout | Select when bandwidth >50 MB/s is needed and system supports Quad SPI protocol |
Compared with AT25DF041A-SSH-T and W25Q40EWUXIE, the SST25VF040B-50-4I-QAE-T provides guaranteed HOLD# and WP# functionality in an industry-standard 8-pin WSON package, making it optimal for legacy SPI designs requiring robust suspend/write-protection without protocol or voltage changes.
Availability
SST25VF040B-50-4I-QAE-T is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and smart energy metering requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for SST25VF040B-50-4I-QAE-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 Inc. is a leading provider of microcontrollers, analog components, and Flash memory solutions, headquartered in Chandler, Arizona.
The SST25VF040B-50-4I-QAE-T belongs to Microchip's 25-series Serial Flash family, engineered specifically for cost-sensitive, space-constrained embedded applications demanding high reliability, low power, and seamless SPI integration.
FAQ
What is the maximum operating frequency of the SST25VF040B-50-4I-QAE-T?
The SST25VF040B-50-4I-QAE-T supports up to 50 MHz clock frequency for High-Speed Read operations using the 0BH opcode and dummy cycle. Standard Read (03H) operates up to 25 MHz. This 50 MHz capability enables faster firmware loading and configuration retrieval in time-critical embedded systems.
Does the SST25VF040B-50-4I-QAE-T support both SPI Mode 0 and Mode 3?
Yes, the SST25VF040B-50-4I-QAE-T is fully compatible with SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1). The device samples SI on the rising edge and drives SO on the falling edge of SCK in both modes, ensuring interoperability with a wide range of microcontrollers and FPGAs without protocol translation.
How does the HOLD# pin function on the SST25VF040B-50-4I-QAE-T?
The HOLD# pin on the SST25VF040B-50-4I-QAE-T 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-allowing other masters to share the bus. Communication resumes upon deasserting HOLD# while CE# remains low.
What erase granularities are supported by the SST25VF040B-50-4I-QAE-T?
The SST25VF040B-50-4I-QAE-T supports three uniform erase granularities: 4-Kbyte sectors, 32-Kbyte overlay blocks, and 64-Kbyte overlay blocks. Sector erase uses opcode 20H, 32-Kbyte block uses 52H, and 64-Kbyte block uses D8H. All erase operations require prior Write Enable (06H) and are subject to STATUS register block protection settings.
Can the SST25VF040B-50-4I-QAE-T be used in industrial temperature environments?
Yes, the SST25VF040B-50-4I-QAE-T is rated for industrial temperature operation from –40°C to +85°C. This rating is confirmed in the official Microchip datasheet DS20005051E and applies to the -I grade suffix in the part number, making it suitable for deployment in harsh environments such as factory automation, outdoor infrastructure, and transportation systems.
SST25VF040B-50-4I-QAE-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- 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-WSON (6x5)
SST25VF040B-50-4I-QAE-T FAQ
1.How can I place an order for SST25VF040B-50-4I-QAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-50-4I-QAE-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-QAE-T reliable?
The price and inventory of SST25VF040B-50-4I-QAE-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-QAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF040B-50-4I-QAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-50-4I-QAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-50-4I-QAE-T?
SST25VF040B-50-4I-QAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-50-4I-QAE-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-QAE-T?
For technical support, including SST25VF040B-50-4I-QAE-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-QAE-T requirements.
6.How does Aetrix verify that SST25VF040B-50-4I-QAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-50-4I-QAE-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-QAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF040B-50-4I-QAE-T?
All SST25VF040B-50-4I-QAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-50-4I-QAE-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-QAE-T part is unused and in its original packaging.
Return procedure for SST25VF040B-50-4I-QAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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