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Microchip Technology SST25PF040C-40V/MF
- Part No.:
- SST25PF040C-40V/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040C-40V/MF.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,697
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Product details
Overview
SST25PF040C-40V/MF from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded firmware storage and code execution in space-constrained systems. It operates from a single 2.3–3.6 V supply, supports 40 MHz high-speed read via Fast-Read Dual I/O (BBH), delivers 100,000 program/erase cycles, and retains data for >20 years - deployed in automotive instrument clusters requiring AEC-Q100 qualified nonvolatile storage.
For engineers reviewing the SST25PF040C-40V/MF datasheet, SST25PF040C-40V/MF pinout, SST25PF040C-40V/MF application, or SST25PF040C-40V/MF equivalent, this page provides verified pin functions, dual-I/O timing behavior, sector/block erase granularity, SuperFlash reliability metrics, and direct alternatives with documented functional alignment and package compatibility.
Technical Context
The SST25PF040C-40V/MF implements a four-wire SPI interface compliant with Modes 0 and 3, using CE#, SCK, SI/SIO0, and SO/SIO1 pins to support standard, fast-read dual-output (3BH), and fast-read dual I/O (BBH) instructions. Its SuperFlash technology employs a split-gate cell with thick-oxide tunneling injector, enabling lower programming current and shorter erase times versus conventional NOR flash.
Memory organization comprises 128 uniform 4 KByte sectors and eight 64 KByte overlay blocks, with page-program capability at 256 bytes/page. Write protection is implemented via hardware WP# pin control of BPL bit and software-configurable BP0–BP2/TB bits in the status register, supporting top/bottom block locking and full-array protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512 KByte), organized as 128 × 4 KByte sectors and 8 × 64 KByte blocks |
| Supply Voltage | 2.3–3.6 V - enables direct interfacing with 3.3 V logic without level shifters |
| Max Clock Frequency | 40 MHz - achieved with Fast-Read Dual I/O (BBH) instruction for 80 MB/s effective throughput |
| Endurance | 100,000 program/erase cycles - sufficient for firmware update logging in industrial controllers |
| Data Retention | >20 years at +85°C - validated for long-life automotive ECUs and medical devices |
| Erase Granularity | Uniform 4 KByte sectors and 64 KByte blocks - allows fine-grained firmware partitioning and OTA update staging |
| Page Program Size | 256 bytes/page - matches typical MCU cache line sizes and minimizes write latency per commit |
Pinout & Package
Package: 8-contact WDFN (5 mm × 6 mm), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low selection signal; 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 during standard/Fast-Read; carries odd-bit data (D7,D5,D3,D1) in Dual I/O mode |
| WP# | Write Protect | Hardware lock-down control for Block-Protection-Lock (BPL) bit; disables status register writes when pulled low |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection |
| VDD | Power Supply | 2.3–3.6 V input; decoupling capacitor (0.1 µF) required within 5 mm of pin per layout guidelines |
| HOLD# | Hold | Pauses ongoing SPI transaction without deselecting device; enables multi-master arbitration or interrupt servicing |
| SCK | Serial Clock | Timing reference for all SPI transfers; rising edge latches input, falling edge outputs data (Mode 0/3 compatible) |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands/addresses in all modes; carries even-bit data (D6,D4,D2,D0) in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables BBH instruction for simultaneous address input and data output on SIO0/SIO1 - reduces clock cycles by 50% vs standard read for same data volume |
| SuperFlash Technology | Split-gate cell architecture lowers active programming current and shortens erase time - cuts total energy per erase by ~40% vs legacy NOR flash |
| Flexible Erase Architecture | Independent 4 KByte sector and 64 KByte block erase permits selective firmware module updates without disturbing bootloader or calibration tables |
| Hardware Hold Function | HOLD# pin suspends SPI communication mid-sequence while preserving internal state - eliminates need for re-initialization after CPU interrupt |
| AEC-Q100 Qualified | Validated for automotive Grade 2 (-40°C to +105°C) operation - meets stress test requirements for engine control and ADAS modules |
Applications
| Automotive Instrument Cluster | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated gauge graphics, boot firmware, and driver configuration profiles in a CAN-connected dashboard ECU. IC Role / Device Role / Timing Role: Nonvolatile code and data storage with deterministic 40 MHz read access for real-time UI rendering. Use Value: AEC-Q100 qualification ensures operation across thermal cycling; 4 KByte sector erase enables over-the-air updates to individual display modules without full reflash. |
Use Scenario: Holding ladder logic programs, I/O mapping tables, and safety-critical firmware in modular programmable logic controllers. IC Role / Device Role / Timing Role: SPI-bootable flash memory providing reliable firmware persistence between power cycles and brownouts. Use Value: 100,000-cycle endurance supports frequent field firmware revisions; WP#/HOLD# pins enable secure update sequencing under runtime supervision. |
| Medical Infusion Pump Bootloader | Smart Energy Meter Firmware |
Use Scenario: Securing bootloader code and cryptographic keys in Class II medical devices subject to IEC 62304 lifecycle requirements. IC Role / Device Role / Timing Role: Trusted boot source with hardware write protection preventing unauthorized firmware modification. Use Value: Software block-protection bits (BP0–BP2/TB) combined with WP# pin allow lockdown of bootloader region while permitting application updates - satisfies FDA traceability mandates. |
Use Scenario: Storing tariff schedules, communication stack binaries, and metrology calibration data in ANSI C12.22-compliant utility meters. IC Role / Device Role / Timing Role: High-reliability serial flash supporting 20+ year field deployment with minimal maintenance. Use Value: >20-year data retention at +85°C ensures accuracy across temperature extremes; dual-I/O mode accelerates DLMS/COSEM firmware downloads over HAN interfaces. |
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 4 Mbit density, 3.3 V, 40 MHz max clock; uses standard Quad SPI (QPI) instead of Dual I/O; no HOLD# pin | Lacks hardware hold function and dual-I/O timing - requires software-managed transaction suspension | Select when QPI interface is already standardized in host MCU and HOLD# is unused |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz max; supports both SPI and QPI; includes dedicated reset pin not present on SST25PF040C-40V/MF | Higher voltage min (2.7 V) limits use with 2.5 V logic; reset pin adds system-level recovery capability | Choose for designs needing faster read performance and hardware reset coordination with FPGA or SoC |
Compared with Winbond W25Q40EW and Cypress S25FL004A, the SST25PF040C-40V/MF uniquely combines AEC-Q100 qualification, HOLD# functionality, and dual-I/O instruction support in a 5×6 mm WDFN package - making it optimal for automotive and industrial applications requiring robust transaction management and extended temperature operation.
Availability
SST25PF040C-40V/MF is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, medical infusion pump bootloaders, and smart energy meter firmware storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SST25PF040C-40V/MF 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 components, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST25PF040C-40V/MF belongs to Microchip's Serial Flash 25 Series, engineered specifically for cost-sensitive, space-constrained embedded systems needing high endurance, low-power operation, and automotive-grade qualification.
FAQ
What is the maximum operating frequency of the SST25PF040C-40V/MF?
The SST25PF040C-40V/MF supports up to 40 MHz operation using the Fast-Read Dual I/O (BBH) instruction. Standard Read (03H) and High-Speed Read (0BH) operate at up to 25 MHz and 40 MHz respectively, but BBH achieves highest effective bandwidth by utilizing both SIO0 and SIO1 for concurrent address input and data output. This 40 MHz rating is specified across the full industrial temperature range (-40°C to +105°C) and 2.3–3.6 V supply.
Does the SST25PF040C-40V/MF support quad SPI mode?
No, the SST25PF040C-40V/MF does not support quad SPI (QSPI) mode. It implements a four-wire SPI interface with dual-I/O capability (SIO0/SIO1), supporting only single and dual I/O protocols - specifically standard SPI, Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH). Quad mode requires four bidirectional data lines, which the SST25PF040C-40V/MF pinout and instruction set do not provide.
What package options are available for the SST25PF040C-40V/MF?
The SST25PF040C-40V/MF is offered in three RoHS-compliant packages: 8-lead SOIC (150 mil), 8-contact WDFN (5 mm × 6 mm), and 8-contact USON (2 mm × 3 mm). The "-MF" suffix in the part number specifically denotes the 8-contact WDFN (5×6 mm) variant. Pin assignments and thermal characteristics differ across packages, and layout footprints are not interchangeable without redesign.
How does the HOLD# function work during an active SPI transaction?
The HOLD# pin on the SST25PF040C-40V/MF pauses an ongoing SPI sequence without resetting internal state or requiring re-initialization. Activation requires CE# to be low and HOLD# to fall coincident with SCK low; release occurs when HOLD# rises while SCK remains low. During hold, SO enters high-impedance, while SI and SCK may float. This enables CPU interrupt handling or bus arbitration without losing command context - a key advantage over software-only pause methods.
Is the SST25PF040C-40V/MF qualified for automotive applications?
Yes, the SST25PF040C-40V/MF is AEC-Q100 qualified for automotive Grade 2 operation (-40°C to +105°C). This qualification covers stress testing for temperature cycling, humidity bias, ESD, and accelerated life testing. The device is explicitly rated for use in instrument clusters, body control modules, and ADAS subsystems where long-term data integrity and thermal resilience are mandatory.
SST25PF040C-40V/MF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-WDFN Exposed Pad
- 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:
- 40 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST25PF040C-40V/MF FAQ
1.How can I place an order for SST25PF040C-40V/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40V/MF 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 SST25PF040C-40V/MF reliable?
The price and inventory of SST25PF040C-40V/MF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SST25PF040C-40V/MF is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40V/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40V/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40V/MF?
SST25PF040C-40V/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40V/MF 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 SST25PF040C-40V/MF?
For technical support, including SST25PF040C-40V/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40V/MF requirements.
6.How does Aetrix verify that SST25PF040C-40V/MF is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40V/MF 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 SST25PF040C-40V/MF meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40V/MF?
All SST25PF040C-40V/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40V/MF, 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 SST25PF040C-40V/MF part is unused and in its original packaging.
Return procedure for SST25PF040C-40V/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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