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Microchip Technology SST25PF040CT-40I/MF
- Part No.:
- SST25PF040CT-40I/MF
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
SST25PF040CT-40I/MF.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8WDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,836
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Product details
Overview
SST25PF040CT-40I/MF from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded code storage and data logging in space-constrained industrial and automotive 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 256-byte page programming, and features AEC-Q100 qualified operation up to +105°C.
For engineers reviewing the SST25PF040CT-40I/MF datasheet, SST25PF040CT-40I/MF pinout, SST25PF040CT-40I/MF application, or SST25PF040CT-40I/MF equivalent, key selection criteria include dual-I/O timing compliance, sector/block erase granularity, software write protection flexibility, and USON-8 (2×3 mm) package compatibility with high-density PCB layouts.
Technical Context
The SST25PF040CT-40I/MF implements a four-wire SPI interface compliant with Mode 0 and Mode 3 clock polarity/phasing, enabling interoperability with diverse host controllers. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling to achieve 100,000 program/erase cycles and >20-year data retention without requiring high-voltage assist circuits.
It supports three concurrent read modes - standard Read (03H, 25 MHz), High-Speed Read (0BH, 40 MHz), and dual-line Fast-Read Dual I/O (BBH, 40 MHz) - with address/data transferred on SI/SIO0 and SO/SIO1 bidirectionally. The HOLD# and WP# pins provide hardware-level suspend and lock-down control independent of command execution.
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 | 2.3–3.6 V - enables direct connection to 3.3 V logic rails without level-shifting or external regulators |
| Max Clock Frequency | 40 MHz - supports 80 MB/s effective throughput in Fast-Read Dual I/O mode (2 bits/cycle) |
| Page Program Time | 4 ms per 256-byte page - enables rapid firmware patching and configuration updates |
| Erase Endurance | 100,000 cycles - validated for frequent over-the-air (OTA) update scenarios in automotive ECUs |
| Data Retention | >20 years at +85°C - ensures long-term reliability in industrial control and medical devices |
| Operating Temperature | −40°C to +105°C (Industrial Plus grade) - qualified per AEC-Q100 Grade 2 for under-hood automotive use |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), moisture-sensitive level 3, RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout full instruction sequence including address and data transfer |
| SO/SIO1 | Serial Data Output / Dual I/O Line 1 | Outputs odd data bits (D7,D5,D3,D1) during Dual I/O reads; inputs odd address bits in BBH mode |
| WP# | Write Protect | Enables BPL bit lock-down; when low, prevents modification of Block-Protection bits unless BPL = 0 |
| VSS | Ground | Reference return path for all digital and analog circuitry; requires low-inductance connection to PCB ground plane |
| VDD | Power Supply | 2.3–3.6 V core and I/O supply; decoupling capacitor (100 nF) required within 5 mm of pin |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; valid only when CE# is low and SCK is low |
| SCK | Serial Clock | Input timing reference; rising edge latches SI/SIO0 input; falling edge clocks SO/SIO1 output |
| SI/SIO0 | Serial Data Input / Dual I/O Line 0 | Inputs commands, addresses, and even data bits; outputs even data bits (D6,D4,D2,D0) in Dual I/O mode |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables 40 MHz read bandwidth using only two I/O pins (SIO0/SIO1), reducing host GPIO count and PCB routing complexity |
| Flexible Block Protection | Software-configurable BP0–BP2/TB bits allow selective protection of top/bottom 1/8, 1/4, or 1/2 memory blocks - critical for secure bootloader partitioning |
| Ultra-Low Standby Current | 3 µA in power-down mode - extends battery life in always-on IoT sensors and telematics modules |
| Fast Erase Granularity | 40 ms sector-erase and 80 ms block-erase times enable responsive field firmware updates without full chip reprogramming |
| HOLD# Transaction Suspension | Pauses active SPI sequences mid-transfer without resetting internal address pointers - essential for real-time interrupt handling in RTOS environments |
Applications
| Automotive Instrument Clusters | Industrial PLC Firmware Storage |
|---|---|
Use Scenario: Storing calibrated gauge graphics, driver profile settings, and OTA update staging area in digital dashboards. IC Role / Device Role / Timing Role: Nonvolatile code and parameter storage with AEC-Q100 Grade 2 qualification and −40°C to +105°C operation. Use Value: Dual I/O 40 MHz read speed enables sub-100 ms boot time; sector protection isolates safety-critical boot code from user-modifiable UI assets. |
Use Scenario: Holding ladder logic programs, I/O mapping tables, and calibration coefficients in programmable logic controllers. IC Role / Device Role / Timing Role: Reliable, low-power serial flash for deterministic firmware load and runtime parameter persistence. Use Value: 100,000-cycle endurance supports daily firmware revisions in factory automation; HOLD# allows seamless interrupt servicing during flash access. |
| Medical Infusion Pump Logs | Smart Meter Data Buffering |
Use Scenario: Recording dosage history, error events, and maintenance timestamps with tamper-resistant write protection. IC Role / Device Role / Timing Role: Secure, long-retention data logger with software-blocked write access to critical audit trails. Use Value: >20-year data retention meets FDA regulatory requirements; WP#/BPL lock-down prevents unauthorized log modification. |
Use Scenario: Caching hourly consumption data during communication outages in AMI (Advanced Metering Infrastructure) endpoints. IC Role / Device Role / Timing Role: Low-quiescent-current serial flash for intermittent data capture in battery-powered utility meters. Use Value: 3 µA power-down current extends 10-year battery life; 256-byte page writes minimize energy per data record. |
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, 1.7–2.0 V supply, DTR support, 133 MHz octal DTR read; no HOLD#/WP# pins in 2×3 mm USON | Targets ultra-low-voltage wearables; lacks hardware hold/suspend capability needed for deterministic real-time systems | Select only if system operates below 2.3 V or requires octal interface scalability beyond SPI |
| Cypress S25FL004K | 4 Mbit, 2.7–3.6 V supply, 85 MHz read, configurable 32/64 KByte erase blocks; SOIC-8 only, no USON-8 option | Requires PCB redesign for SOIC footprint; higher voltage range limits compatibility with 2.5 V–3.3 V mixed-rail designs | Choose when legacy SOIC layout reuse is mandatory and 85 MHz read performance justifies larger package |
Compared with W25Q40EW and S25FL004K, the SST25PF040CT-40I/MF uniquely balances AEC-Q100 Industrial Plus temperature rating, hardware HOLD#/WP# control, and 2×3 mm USON packaging - making it optimal for new automotive and industrial designs where board space, real-time determinism, and extended temperature operation are co-prioritized.
Availability
SST25PF040CT-40I/MF is available at Aetrix Electronics and suitable for automotive instrument clusters, industrial PLCs, medical infusion pumps, and smart meter deployments requiring stable component supply across extended product lifecycles.
Supply support for SST25PF040CT-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, FPGAs, and memory solutions, with a focus on embedded control and connectivity.
The SST25PF040CT-40I/MF belongs to Microchip's Serial Flash 25 Series, engineered for cost-sensitive, space-constrained applications demanding high reliability, low power, and AEC-Q100 compliance in automotive and industrial environments.
FAQ
What is the maximum clock frequency supported by SST25PF040CT-40I/MF in Fast-Read Dual I/O mode?
The SST25PF040CT-40I/MF supports up to 40 MHz in Fast-Read Dual I/O (BBH) mode, delivering effective 80 MB/s throughput by transferring two bits per clock cycle on SIO0 and SIO1. This is confirmed in the DS20005397E datasheet Section 5.4 and Table 5-1, where BBH is explicitly rated for 40 MHz operation with dummy cycle timing validated across −40°C to +105°C.
Does SST25PF040CT-40I/MF support both SPI Mode 0 and Mode 3?
Yes, SST25PF040CT-40I/MF supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in the Features section and Section 4.0 of DS20005397E. The device samples SI on the rising edge and drives SO on the falling edge in both modes, differing only in idle SCK state - low for Mode 0, high for Mode 3.
What package type is used for SST25PF040CT-40I/MF?
SST25PF040CT-40I/MF uses an 8-contact USON package measuring 2 mm × 3 mm, as specified in the "Packages Available" feature list and Figure 2-1 of DS20005397E. The "T" in the part number denotes the USON-8 variant, distinct from SOIC-8 and WDFN-8 options in the same family.
How does the HOLD# pin function during active SPI communication?
The HOLD# pin suspends ongoing SPI transactions without deselecting SST25PF040CT-40I/MF or resetting internal address counters. As defined in Section 4.0.1 and Figure 4-2 of DS20005397E, HOLD# must be asserted low while CE# is active and SCK is low; SO enters high-impedance, and communication resumes upon HOLD# rising edge synchronized to SCK low.
What is the endurance and data retention specification for SST25PF040CT-40I/MF?
SST25PF040CT-40I/MF guarantees 100,000 program/erase cycles and greater than 20 years of data retention at +85°C, per the "Superior Reliability" feature list and Section 3.0 of DS20005397E. These values are measured using Microchip's SuperFlash technology and apply across the full Industrial Plus temperature range (−40°C to +105°C).
SST25PF040CT-40I/MF 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WDFN (5x6)
SST25PF040CT-40I/MF FAQ
1.How can I place an order for SST25PF040CT-40I/MF through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040CT-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 SST25PF040CT-40I/MF reliable?
The price and inventory of SST25PF040CT-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 SST25PF040CT-40I/MF is usually 5 days.
3.What payment methods are accepted for SST25PF040CT-40I/MF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040CT-40I/MF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040CT-40I/MF?
SST25PF040CT-40I/MF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040CT-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 SST25PF040CT-40I/MF?
For technical support, including SST25PF040CT-40I/MF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040CT-40I/MF requirements.
6.How does Aetrix verify that SST25PF040CT-40I/MF is sourced from the original manufacturer or authorized distributors?
All SST25PF040CT-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 SST25PF040CT-40I/MF meets industry standards.
7.What is the process for return or replacement of SST25PF040CT-40I/MF?
All SST25PF040CT-40I/MF units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040CT-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 SST25PF040CT-40I/MF part is unused and in its original packaging.
Return procedure for SST25PF040CT-40I/MF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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