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Microchip Technology SST25PF040C-40I/MF
- Part No.:
- SST25PF040C-40I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040C-40I/MF.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,865
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Product details
Overview
SST25PF040C-40I/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 2.3–3.6 V, supports 40 MHz high-speed read via Fast-Read Dual I/O (BBH), delivers 100,000 program/erase cycles, and retains data >20 years. Used in automotive infotainment boot memory and industrial PLC firmware storage.
For engineers reviewing the SST25PF040C-40I/MF datasheet, SST25PF040C-40I/MF pinout, SST25PF040C-40I/MF application, or SST25PF040C-40I/MF equivalent, key selection criteria include its AEC-Q100 qualified industrial-plus temperature range (–40°C to +105°C), dual I/O interface timing, 256-byte page programming, and software/hardware write protection architecture.
Technical Context
The SST25PF040C-40I/MF implements a four-wire SPI interface compliant with Mode 0 and Mode 3 clock polarity/phasing, enabling interoperability with diverse microcontroller host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve superior endurance and retention versus conventional NOR flash.
It features dual I/O capability (SIO0/SIO1) supporting Fast-Read Dual Output (3BH) and Fast-Read Dual I/O (BBH) instructions, doubling effective data throughput at 40 MHz. Memory organization comprises 128 uniform 4 KByte sectors and eight 64 KByte overlay blocks, enabling granular erase control without full-chip erasure.
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 - single-supply operation compatible with 3.3 V logic systems and low-power battery-backed designs |
| Max Clock Frequency | 40 MHz - enables 40 MB/s peak read bandwidth in Dual I/O mode, reducing boot time in MCU-based systems |
| Endurance | 100,000 program/erase cycles - sufficient for firmware update logging and configuration storage in field-deployed equipment |
| Data Retention | >20 years at +85°C - ensures long-term reliability in automotive and industrial environments without refresh |
| Page Size | 256 bytes - aligns with typical MCU cache line and bootloader sector sizes, minimizing partial-page write overhead |
| Operating Temp | –40°C to +105°C (Industrial Plus) - AEC-Q100 qualified for under-hood automotive and high-ambient industrial use |
Pinout & Package
Package: 8-contact WDFN (5 mm × 6 mm), RoHS-compliant, moisture-sensitive level 3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequence; deassertion places device in standby (5 µA) |
| SO/SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs MSB-first data during standard read; carries odd bits (D7,D5,D3,D1) in Dual I/O mode; high-impedance when not active |
| WP# | Write Protect | Hardware enable for status register lock-down (BPL bit); when low, prevents modification of BP0–BP2, TB, and BPL bits |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-impedance PCB connection to minimize noise coupling |
| VDD | Power Supply | 2.3–3.6 V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin per layout guidelines |
| HOLD# | Hold Control | Pauses ongoing SPI transaction without deselecting device; allows host to service higher-priority interrupts mid-sequence |
| SCK | Serial Clock | Input timing reference; rising edge latches SI/SIO0/SIO1 inputs; falling edge drives SO/SIO0/SIO1 outputs |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Accepts commands, addresses, and data in standard mode; carries even bits (D6,D4,D2,D0) in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables 40 MHz Fast-Read Dual Output (3BH) and Fast-Read Dual I/O (BBH), doubling effective throughput versus single-I/O SPI |
| Flexible Erase Architecture | Independent 4 KByte sector and 64 KByte block erase options allow targeted firmware updates without disturbing adjacent code sections |
| Hardware + Software Write Protection | Combines WP# pin control with programmable Block-Protection bits (BP0–BP2, TB, BPL) to prevent accidental or malicious firmware corruption |
| Ultra-Low Standby Power | 3 µA in power-down mode reduces system-level quiescent current, critical for battery-powered IoT edge nodes and automotive always-on modules |
| SuperFlash Technology | Split-gate cell design achieves 100K cycles and >20-year retention at +85°C - validated for automotive AEC-Q100 Grade 2 applications |
Applications
| Automotive Infotainment Boot Memory | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Stores boot loader and primary firmware image for head-unit MCU, loaded at power-on reset. IC Role / Device Role / Timing Role: Non-volatile code storage with fast 40 MHz Dual I/O read access to minimize boot latency. Use Value: AEC-Q100 qualification and –40°C to +105°C operation ensure reliable startup across vehicle thermal cycles. |
Use Scenario: Holds field-upgradable ladder logic and HMI configuration data in programmable logic controllers. IC Role / Device Role / Timing Role: Sector-erasable storage enabling incremental firmware patches without full reflash downtime. Use Value: 100,000-cycle endurance supports daily configuration updates over 10+ year product lifetime. |
| Medical Diagnostic Device Parameter Tables | Smart Energy Meter Calibration Data |
Use Scenario: Stores calibrated sensor coefficients and diagnostic lookup tables in portable ultrasound units. IC Role / Device Role / Timing Role: Read-mostly storage with infrequent writes; accessed via SPI during self-test sequences. Use Value: >20-year data retention guarantees accuracy compliance between recalibration intervals mandated by IEC 62304. |
Use Scenario: Retains metrology calibration constants and tariff schedule tables in ANSI C12.20-compliant electricity meters. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage using hardware WP# and software BP bits. Use Value: Block-protection granularity prevents overwrite of critical calibration sectors during firmware upgrades. |
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 | 4 Mbit, 1.8 V supply, 104 MHz Quad I/O max, no HOLD# pin, different status register map | Lacks HOLD# and WP# hardware pins; requires software-managed suspend and protection | Select if system uses 1.8 V I/O and prioritizes quad-mode speed over hardware interrupt pausing and dual-pin protection. |
| Cypress S25FL004A | 4 Mbit, 2.7–3.6 V, 50 MHz max, supports QPI mode, different sector/block layout (64 × 64 KByte) | Uses uniform 64 KByte sectors only; no 4 KByte sector option for fine-grained updates | Select if QPI protocol compatibility is required and firmware update granularity can be relaxed to 64 KByte boundaries. |
Compared with W25Q40EW and S25FL004A, the SST25PF040C-40I/MF uniquely combines AEC-Q100 qualification, hardware HOLD#/WP# pins, 4 KByte sector erase, and 2.3–3.6 V operation - making it optimal for automotive and industrial designs requiring robust, pin-controlled reliability.
Availability
SST25PF040C-40I/MF is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC firmware, medical diagnostics, smart energy metering, and aerospace avionics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SST25PF040C-40I/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 devices, and memory solutions, with emphasis on embedded control and reliability-critical applications.
The SST25PF040C-40I/MF belongs to Microchip's Serial Flash 25 Series, engineered for high-reliability, low-power, SPI-compatible non-volatile storage in automotive, industrial, and medical systems where data integrity and long-term stability are mandatory.
FAQ
What is the maximum operating frequency of the SST25PF040C-40I/MF in Dual I/O mode?
The SST25PF040C-40I/MF supports up to 40 MHz in Fast-Read Dual I/O (BBH) mode, delivering effective throughput of 10 MB/s (2 bits/clock × 40 MHz ÷ 8). This is confirmed in the DS20005397E datasheet Section 5.4 and Table 5-1, where BBH instruction timing is specified at 40 MHz maximum. The device maintains this rate across its full –40°C to +105°C operating range.
Does the SST25PF040C-40I/MF support both SPI Mode 0 and Mode 3?
Yes, the SST25PF040C-40I/MF explicitly supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1), as stated in DS20005397E Section 4.0 and Figure 4-1. This dual-mode compatibility ensures interoperability with a broad range of microcontrollers, including those with fixed SPI polarity settings.
How does the HOLD# pin function during an active SPI transaction?
The HOLD# pin on the SST25PF040C-40I/MF suspends an ongoing SPI sequence without deselecting the device: when HOLD# transitions low while CE# is active and SCK is low, SO enters high-impedance and communication pauses. Resuming requires HOLD# high and CE# low. This behavior is defined in DS20005397E Section 4.0.1 and Figure 4-2, enabling deterministic interrupt handling in real-time systems.
What is the page size and programming time for the SST25PF040C-40I/MF?
The SST25PF040C-40I/MF has a fixed 256-byte page size, and typical page-program time is 4 ms per 256 bytes, as specified in DS20005397E Section "Features" and Table 5-1. Programming less than a full page is allowed but partial bytes are ignored; the device automatically wraps excess data within the target page boundary per Section 5.5.
Is the SST25PF040C-40I/MF qualified for automotive applications?
Yes, the SST25PF040C-40I/MF is AEC-Q100 qualified (Grade 2) and rated for –40°C to +105°C (Industrial Plus), as documented in DS20005397E Section "Features". This qualification covers stress testing for temperature cycling, humidity, and ESD, making it suitable for automotive infotainment, body control, and ADAS subsystems where reliability is critical.
SST25PF040C-40I/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST25PF040C-40I/MF FAQ
1.How can I place an order for SST25PF040C-40I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40I/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-40I/MF reliable?
The price and inventory of SST25PF040C-40I/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-40I/MF is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40I/MF?
SST25PF040C-40I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40I/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-40I/MF?
For technical support, including SST25PF040C-40I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40I/MF requirements.
6.How does Aetrix verify that SST25PF040C-40I/MF is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40I/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-40I/MF meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40I/MF?
All SST25PF040C-40I/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40I/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-40I/MF part is unused and in its original packaging.
Return procedure for SST25PF040C-40I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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