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Microchip Technology SST25VF040B-50-4I-SAE-T
- Part No.:
- SST25VF040B-50-4I-SAE-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25VF040B-50-4I-SAE-T.pdf
- Description:
- IC FLASH 4MBIT SPI 50MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:46,385
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Product details
Overview
SST25VF040B-50-4I-SAE-T from Microchip Technology is a 4-Mbit SPI serial Flash memory IC designed for embedded firmware storage and code execution 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, and retains data for >100 years - enabling reliable boot code and configuration storage in industrial controllers and IoT edge nodes.
For engineers reviewing the SST25VF040B-50-4I-SAE-T datasheet, SST25VF040B-50-4I-SAE-T pinout, SST25VF040B-50-4I-SAE-T application, or SST25VF040B-50-4I-SAE-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, 4-Kbyte sector + 32/64-Kbyte block erase granularity, Auto Address Increment (AAI) programming efficiency, HOLD#/WP# hardware control, and industrial temperature range (-40°C to +85°C) support.
Technical Context
This SPI Flash uses Microchip's proprietary SuperFlash® technology with split-gate cell architecture, enabling lower programming current and shorter erase times versus conventional NOR Flash. Its dual-mode SPI interface (Mode 0 and Mode 3) ensures interoperability with diverse microcontroller host interfaces without protocol translation.
The device integrates dedicated hardware control pins - HOLD# for pausing ongoing serial transfers without chip deselection, and WP# for enabling STATUS register lock-down - alongside software-controlled block protection (BP3–BP0) and AAI word programming for accelerated sequential writes. End-of-write detection is supported via both BUSY-bit polling and hardware RY/BY# status on SO during AAI mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 Kbytes), organized as uniform 4-Kbyte sectors, 32-Kbyte and 64-Kbyte overlay blocks |
| Supply Voltage | 2.7V–3.6V single supply - eliminates need for auxiliary voltage rails in 3.3V systems |
| Max Clock Frequency | 50 MHz (High-Speed Read) - enables fast firmware fetch and OTA update streaming |
| Endurance | 100,000 program/erase cycles - supports field-upgradable firmware with frequent reprogramming |
| Data Retention | >100 years at +25°C - ensures long-term reliability in unattended industrial deployments |
| Operating Temp | -40°C to +85°C (Industrial grade) - qualified for use in motor drives, PLCs, and outdoor gateways |
| Active Read Current | 10 mA typical at 50 MHz - balances speed and power in battery-backed or energy-sensitive designs |
| Standby Current | 5 µA typical - minimizes quiescent power in always-on edge sensor nodes |
Pinout & Package
Package: 8-contact WSON (6 mm × 5 mm), RoHS-compliant, moisture sensitivity level (MSL) 3.
| 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 |
| SO | Serial Data Output | Outputs data on falling SCK edge; reconfigurable as RY/BY# during AAI programming for hardware busy signaling |
| WP# | Write-Protect | Enables/disables STATUS register lock-down (BPL bit); controls software block protection activation |
| VSS | Ground | Reference return path for all I/O and core logic - requires low-impedance PCB grounding |
| VDD | Power Supply | 2.7V–3.6V core and I/O supply - decoupling capacitor mandatory per datasheet layout guidelines |
| HOLD# | Hold | Suspends active SPI transfer without resetting internal address counter - preserves context during interrupt servicing |
| SCK | Serial Clock | Timing reference for SI/SO; rising edge latches input, falling edge clocks output - supports Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI | Serial Data Input | Accepts opcodes, addresses, and data MSb-first; sampled on rising SCK edge - compatible with standard SPI master peripherals |
Key Features
| Feature | Design Value |
|---|---|
| Auto Address Increment (AAI) Programming | Reduces total programming time by eliminating repeated address transmission for sequential word writes - critical for fast firmware patching |
| Flexible Erase Architecture | Independent 4-Kbyte sector, 32-Kbyte block, and 64-Kbyte block erase - enables granular updates without disturbing adjacent firmware partitions |
| Dual SPI Mode Support | Native compatibility with both SPI Mode 0 and Mode 3 - eliminates need for clock polarity/inversion configuration in host MCU drivers |
| Hardware Hold Function | Pauses ongoing read/write sequences with no loss of internal state - simplifies real-time system integration where SPI bus arbitration is required |
| Software Block Protection | Configurable BP3–BP0 bits protect memory regions from accidental overwrite - supports secure bootloader + application partitioning |
| SuperFlash® Technology | Split-gate cell design achieves lower program current and faster erase vs. standard NOR Flash - reduces total energy per operation and thermal load |
Applications
| Industrial PLC Firmware Storage | IoT Edge Device Configuration |
|---|---|
Use Scenario: Storing ladder logic firmware and I/O mapping tables in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile code storage and execution-in-place (XIP) memory - accessed via SPI during boot and runtime firmware updates. Use Value: Industrial temperature rating (-40°C to +85°C), 100,000-cycle endurance, and sector-level erase enable field-reprogrammability without full flash rewrites. | Use Scenario: Holding device-specific calibration data, network credentials, and OTA update staging buffers in battery-powered smart sensors. IC Role / Device Role / Timing Role: Low-power configuration memory - accessed intermittently during wake-up and update cycles using HOLD# to suspend during MCU interrupts. Use Value: 5 µA standby current and AAI programming reduce average power and update latency, extending battery life in wireless nodes. |
| Medical Diagnostic Instrument Boot Code | Automotive Body Control Module (BCM) Parameter Storage |
Use Scenario: Storing certified boot loader and safety-critical diagnostic routines in portable ultrasound or ECG devices requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot memory - protected via WP#-enabled STATUS register lockdown and software block protection. Use Value: >100-year data retention and write-protection granularity ensure firmware integrity across product lifetime and audit cycles. | Use Scenario: Storing vehicle-specific configuration profiles (e.g., lighting patterns, door lock behavior) in BCMs subject to dealership reprogramming. IC Role / Device Role / Timing Role: Field-updatable parameter memory - erased and rewritten via 4-Kbyte sectors to preserve unrelated settings during partial updates. Use Value: Uniform 4-Kbyte sector erase prevents corruption of adjacent vehicle configuration zones during dealer service events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI serial Flash applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT25DF041A-SSH-T | 4-Mbit, 3.3V, 70 MHz max clock, 100K cycles, same 8-WSON package | Higher clock speed but lacks HOLD# pin and AAI programming mode | Select when maximum read throughput is prioritized over suspend capability and sequential write efficiency |
| W25Q40EWUXIE | 4-Mbit, 1.8V/3.3V dual supply, 104 MHz DTR mode, 100K cycles, 8-WSON | Supports Dual/Quad SPI and deep power-down, but requires voltage translation in 3.3V-only systems | Select when migrating to higher-speed interfaces or needing ultra-low deep-sleep current (1 µA) |
Compared with AT25DF041A-SSH-T and W25Q40EWUXIE, the SST25VF040B-50-4I-SAE-T uniquely combines industrial temperature operation, hardware HOLD# support, and AAI programming - making it optimal for deterministic real-time embedded systems where bus suspension and fast firmware patching are essential.
Availability
SST25VF040B-50-4I-SAE-T is available at Aetrix Electronics and suitable for industrial PLCs, IoT edge gateways, medical diagnostic instruments, and automotive body control modules requiring stable component supply across extended lifecycles.
Supply support for SST25VF040B-50-4I-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 Inc. is a leading provider of microcontrollers, analog components, and Flash memory solutions, serving industrial, automotive, and communications markets with vertically integrated silicon and development tools.
The SST25VF040B-50-4I-SAE-T belongs to Microchip's 25-series Serial Flash family, engineered specifically for cost-sensitive, space-constrained embedded systems requiring robust non-volatile storage with SPI simplicity and industrial-grade reliability.
FAQ
What is the maximum operating clock frequency supported by the SST25VF040B-50-4I-SAE-T?
The SST25VF040B-50-4I-SAE-T supports up to 50 MHz for High-Speed Read operations using the 0BH opcode and dummy cycle. Standard Read (03H) is rated to 25 MHz. This 50 MHz capability enables faster firmware loading and data retrieval in time-critical embedded applications, and is explicitly validated in the DS20005051E datasheet under Section 5.2.
Does the SST25VF040B-50-4I-SAE-T support both SPI Mode 0 and Mode 3?
Yes, the SST25VF040B-50-4I-SAE-T natively supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as confirmed in Section 4.0 of the DS20005051E datasheet. This dual-mode compatibility eliminates the need for clock polarity or phase inversion in host MCU SPI peripheral configuration, simplifying integration across diverse controller platforms.
How does the HOLD# pin function on the SST25VF040B-50-4I-SAE-T?
The HOLD# pin on the SST25VF040B-50-4I-SAE-T suspends an active SPI transaction without deselecting the device or resetting internal address counters. As detailed in Section 4.1, HOLD# must be asserted low while CE# remains active low; SO enters high-impedance, and communication resumes upon de-asserting HOLD#. This enables deterministic bus arbitration in real-time systems.
What erase granularities are available on the SST25VF040B-50-4I-SAE-T?
The SST25VF040B-50-4I-SAE-T provides three independent erase granularities: uniform 4-Kbyte sectors (20H opcode), 32-Kbyte overlay blocks (52H), and 64-Kbyte overlay blocks (D8H). This flexibility - documented in Sections 3.0 and 5.7–5.8 - allows selective updates without disturbing adjacent firmware or configuration data, improving field upgrade safety and efficiency.
Is the SST25VF040B-50-4I-SAE-T qualified for industrial temperature operation?
Yes, the SST25VF040B-50-4I-SAE-T is specified for industrial temperature range (-40°C to +85°C), as stated in the "Features" section of DS20005051E. The "-I" suffix in the part number explicitly denotes industrial grade, and this rating is validated across all electrical parameters including read/write timing, endurance, and data retention.
SST25VF040B-50-4I-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:
- 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-SAE-T FAQ
1.How can I place an order for SST25VF040B-50-4I-SAE-T through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25VF040B-50-4I-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 SST25VF040B-50-4I-SAE-T reliable?
The price and inventory of SST25VF040B-50-4I-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 SST25VF040B-50-4I-SAE-T is usually 5 days.
3.What payment methods are accepted for SST25VF040B-50-4I-SAE-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25VF040B-50-4I-SAE-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25VF040B-50-4I-SAE-T?
SST25VF040B-50-4I-SAE-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25VF040B-50-4I-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 SST25VF040B-50-4I-SAE-T?
For technical support, including SST25VF040B-50-4I-SAE-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-SAE-T requirements.
6.How does Aetrix verify that SST25VF040B-50-4I-SAE-T is sourced from the original manufacturer or authorized distributors?
All SST25VF040B-50-4I-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 SST25VF040B-50-4I-SAE-T meets industry standards.
7.What is the process for return or replacement of SST25VF040B-50-4I-SAE-T?
All SST25VF040B-50-4I-SAE-T units undergo pre-shipment inspection (PSI). If there is an issue with SST25VF040B-50-4I-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 SST25VF040B-50-4I-SAE-T part is unused and in its original packaging.
Return procedure for SST25VF040B-50-4I-SAE-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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