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Microchip Technology SST25PF040CT-40I/MF18GVAO
- Part No.:
- SST25PF040CT-40I/MF18GVAO
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040CT-40I/MF18GVAO.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,219
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Product details
Overview
SST25PF040CT-40I/MF18GVAO from Microchip Technology is a 4 Mbit (512 KByte), 2.3–3.6V SPI serial flash memory IC with SuperFlash technology, supporting 40 MHz high-speed read, dual-output and dual I/O modes, and uniform 4 KByte sector/64 KByte block erase - deployed in automotive and industrial embedded systems for firmware storage and code execution.
For engineers reviewing the SST25PF040CT-40I/MF18GVAO datasheet, SST25PF040CT-40I/MF18GVAO pinout, SST25PF040CT-40I/MF18GVAO application, or SST25PF040CT-40I/MF18GVAO equivalent, key selection considerations include its AEC-Q100 qualified industrial-plus temperature range (–40°C to +105°C), 256-byte page programming, software/hardware write protection, and compatibility with SPI Modes 0 and 3 in 8-contact USON (2 mm × 3 mm) packaging.
Technical Context
This device implements a four-wire SPI interface with dedicated SI/SIO0 and SO/SIO1 pins enabling dual-output and dual I/O read operations, reducing instruction latency via parallel data transfer on two lines per clock edge. Its SuperFlash split-gate cell architecture delivers lower program/erase current and faster erase times versus conventional NOR flash.
The internal control logic supports end-of-write detection via BUSY-bit polling, hardware HOLD# and WP# pins for real-time command suspension and block-protection lockdown, and a software status register with non-volatile BP0–BP2, TB, and BPL bits for configurable memory protection across top/bottom address regions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KByte sectors and 8 × 64 KByte overlay blocks |
| Supply Voltage | 2.3–3.6V single supply - enables direct interfacing with 3.3V microcontrollers without level shifting |
| Max Clock Frequency | 40 MHz - supports high-throughput firmware reads in boot and runtime contexts |
| Page Size | 256 bytes - defines minimum programmable unit; aligns with typical MCU cache line and OTA update chunk sizes |
| Erase Endurance | 100,000 program/erase cycles - ensures long-term reliability in field-upgradable embedded devices |
| Data Retention | >20 years at +85°C - validated for automotive and industrial deployments requiring multi-decade operation |
| Operating Temp | –40°C to +105°C (Industrial Plus) - AEC-Q100 qualified for under-hood and motor-control applications |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), moisture-sensitive level 3, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low during full command sequence including address/data transfer |
| SO / SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs MSB-first data in standard read; carries odd data bits (D7,D5,D3,D1) in dual-output/dual-I/O modes |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of status register protection bits unless BPL = 0 |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6V core and I/O supply; decoupling capacitor (0.1 µF) required within 5 mm of pin |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; requires synchronization with SCK low state |
| SCK | Serial Clock | Timing reference for all transfers; rising edge latches input (SI/SIO0), falling edge outputs data (SO/SIO1) |
| SI / SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands/addresses/data in standard mode; carries even data bits (D6,D4,D2,D0) in dual modes |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Read Mode (BBH) | Reduces address input time by 50% vs standard SPI - accelerates sequential firmware fetch in resource-constrained MCUs |
| Flexible Erase Granularity | Independent 4 KByte sector and 64 KByte block erase - enables selective firmware patching without full chip reprogramming |
| Ultra-Low Standby Current | 3 µA in power-down mode - extends battery life in always-on IoT edge nodes and telematics modules |
| Hardware Write Protection | WP# pin + status register BPL bit provides tamper-resistant lockdown of critical bootloader sectors |
| End-of-Write Detection | BUSY bit polling eliminates fixed delay timing - simplifies driver implementation and improves system responsiveness |
Applications
| Automotive Instrument Cluster | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Stores calibrated gauge graphics, UI assets, and safety-critical boot code in AEC-Q100 compliant ECUs. IC Role / Device Role / Timing Role: Nonvolatile code storage with deterministic 40 MHz read access and hardware HOLD# for interrupt-safe updates. Use Value: Enables over-the-air (OTA) partial firmware updates using 4 KByte sector erase - minimizing downtime and flash wear. |
Use Scenario: Holds ladder logic programs, configuration parameters, and diagnostic logs in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: SPI-connected persistent memory with 100K-cycle endurance for frequent parameter writes in factory automation. Use Value: Software block protection (BP0–BP2) isolates bootloader region from accidental overwrite during field commissioning. |
| Medical Infusion Pump Bootloader | Smart Energy Meter Firmware |
Use Scenario: Secures certified bootloader and calibration constants in Class II medical devices requiring traceable firmware integrity. IC Role / Device Role / Timing Role: AEC-Q100 qualified flash with >20-year data retention at +105°C for long-lifecycle medical hardware. Use Value: WP#-enabled BPL bit prevents unauthorized status register modification - meeting IEC 62304 software safety requirements. |
Use Scenario: Stores AMI firmware, tariff tables, and cryptographic keys in utility-grade meters operating in outdoor enclosures. IC Role / Device Role / Timing Role: Low-power (3 µA power-down) serial flash supporting extended battery backup during grid outages. Use Value: Dual-output read (3BH) accelerates secure boot verification - reducing startup time before metering functions activate. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Winbond W25Q40EW | Same density (4 Mbit), 1.65–1.95V/2.7–3.6V dual supply; no HOLD# pin; supports QPI mode not present in SST25PF040C | Lacks hardware HOLD# and AEC-Q100 qualification - unsuitable for automotive real-time suspend use cases | Select only if QPI interface or wider voltage range is required and HOLD# functionality is unused |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6V, 50 MHz max clock; includes SFDP register; no dual-I/O mode; different status register layout | Higher speed but lacks Fast-Read Dual I/O (BBH) instruction - limits bandwidth optimization in constrained MCU designs | Prefer when SFDP-based auto-configuration is needed; avoid when dual-I/O throughput is critical |
Compared with W25Q40EW and S25FL004A, SST25PF040CT-40I/MF18GVAO uniquely combines AEC-Q100 qualification, hardware HOLD#, and BBH dual-I/O support in a 2 mm × 3 mm USON package - making it optimal for automotive and industrial systems demanding deterministic suspend, compact layout, and high read efficiency.
Availability
SST25PF040CT-40I/MF18GVAO is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SST25PF040CT-40I/MF18GVAO 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and memory solutions for industrial, automotive, and aerospace markets.
The SST25PF040CT-40I/MF18GVAO belongs to Microchip's Serial Flash 25 Series, designed specifically for cost-sensitive, space-constrained embedded systems needing reliable, low-power, high-speed nonvolatile storage with robust write protection.
FAQ
What is the operating temperature range of the SST25PF040CT-40I/MF18GVAO?
The SST25PF040CT-40I/MF18GVAO is rated for Industrial Plus operation from –40°C to +105°C and is AEC-Q100 qualified, making it suitable for under-hood automotive applications and high-temperature industrial environments. This specification is verified per Microchip DS20005397E and applies specifically to the -40I suffix variant.
Does the SST25PF040CT-40I/MF18GVAO support SPI Mode 3?
Yes, the SST25PF040CT-40I/MF18GVAO supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as confirmed in Section 4.0 of the datasheet. The device samples SI on the rising SCK edge and drives SO on the falling edge in both modes, with SCK idle high in Mode 3.
How does the HOLD# pin function during active SPI communication?
The HOLD# pin suspends an ongoing SPI transaction without deselecting the device: it activates when HOLD# goes low while CE# is low and SCK is low, placing SO in high-impedance while preserving internal state. Communication resumes when HOLD# returns high synchronized with SCK low - a feature explicitly defined for SST25PF040CT-40I/MF18GVAO in Figure 4-2 and Section 4.0.1.
What is the maximum page-program time for the SST25PF040CT-40I/MF18GVAO?
The typical page-program time for SST25PF040CT-40I/MF18GVAO is 4 ms per 256-byte page, as specified in the Features section of DS20005397E. This value is measured under standard conditions (VDD = 3.0V, TA = 25°C) and represents the self-timed internal programming duration after CE# is deasserted.
Can the SST25PF040CT-40I/MF18GVAO be used in dual-I/O mode with standard SPI peripherals?
Yes - the SST25PF040CT-40I/MF18GVAO supports Fast-Read Dual I/O (instruction 0xBB) using standard SPI hardware: SI/SIO0 and SO/SIO1 share bidirectional functionality, with address bits input on both lines simultaneously and data output on both lines per clock edge. No special controller is required beyond GPIO-capable SPI master support.
SST25PF040CT-40I/MF18GVAO 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:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST25PF040CT-40I/MF18GVAO FAQ
1.How can I place an order for SST25PF040CT-40I/MF18GVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-40I/MF18GVAO 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 SST25PF040CT-40I/MF18GVAO reliable?
The price and inventory of SST25PF040CT-40I/MF18GVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040CT-40I/MF18GVAO is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40I/MF18GVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40I/MF18GVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40I/MF18GVAO?
SST25PF040CT-40I/MF18GVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-40I/MF18GVAO 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 SST25PF040CT-40I/MF18GVAO?
For technical support, including SST25PF040CT-40I/MF18GVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40I/MF18GVAO requirements.
6.How does Aetrix verify that SST25PF040CT-40I/MF18GVAO is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-40I/MF18GVAO 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 SST25PF040CT-40I/MF18GVAO meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40I/MF18GVAO?
All SST25PF040CT-40I/MF18GVAO units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-40I/MF18GVAO, 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 SST25PF040CT-40I/MF18GVAO part is unused and in its original packaging.
Return procedure for SST25PF040CT-40I/MF18GVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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