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Microchip Technology SST25PF040C-40V/SN
- Part No.:
- SST25PF040C-40V/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SST25PF040C-40V/SN.pdf
- Description:
- IC FLASH 4MBIT SPI 40MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,552
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Product details
Overview
SST25PF040C-40V/SN from Microchip Technology is a 4 Mbit SPI serial flash memory IC designed for embedded code storage and data logging 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. It is used in automotive infotainment boot code storage where AEC-Q100 qualification and low-power standby (3 µA) are critical.
For engineers reviewing the SST25PF040C-40V/SN datasheet, SST25PF040C-40V/SN pinout, SST25PF040C-40V/SN application, or SST25PF040C-40V/SN equivalent, key selection criteria include SPI Mode 0/3 compatibility, dual I/O timing support, 4 KByte sector erase granularity, industrial-plus temperature range (–40°C to +105°C), and USON/WDFN/SOIC package options with validated hold/write-protect functionality.
Technical Context
The SST25PF040C-40V/SN implements a four-wire SPI interface with dedicated SI/SIO0 and SO/SIO1 bidirectional pins enabling dual-output and dual-I/O modes. Its SuperFlash technology uses split-gate cells and thick-oxide tunneling injectors to achieve faster erase times (40 ms sector, 80 ms block) and lower energy per operation versus conventional flash.
It features a software-configurable status register with BUSY bit polling, WEL latch control, and non-volatile block-protection bits (BP0–BP2, TB, BPL) that interact with the hardware WP# and HOLD# pins to enable dynamic, layered write protection without requiring external logic.
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 |
| Interface Speed | 40 MHz max clock frequency for High-Speed Read, Fast-Read Dual-Output, and Fast-Read Dual I/O instructions |
| Supply Voltage | 2.3–3.6 V single supply - enables direct connection to 3.3 V I/O domains without level shifters |
| Endurance & Retention | 100,000 program/erase cycles; >20 years data retention at +85°C - suitable for firmware update cycles in field-deployed devices |
| Power Consumption | 5 mA typical active read current; 3 µA typical power-down standby - reduces system-level quiescent power in battery-backed applications |
| Temperature Range | Industrial Plus: –40°C to +105°C - qualified for under-hood automotive modules and industrial edge controllers |
| Erase Granularity | Uniform 4 KByte sectors and 64 KByte blocks - allows fine-grained firmware partitioning and OTA update management |
Pinout & Package
Package: 8-contact USON (2 mm × 3 mm), also available in 8-lead SOIC (150 mil) and 8-contact WDFN (5 mm × 6 mm). The SST25PF040C-40V/SN variant is specified with USON packaging per /SN suffix.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CE# | Chip Enable | Active-low device select; must remain low throughout command sequences; drives device into standby when high |
| SO/SIO1 | Serial Data Output / Dual I/O | Outputs data during standard read; serves as bidirectional data line in Dual I/O mode (odd bits D7/D5/D3/D1) |
| WP# | Write Protect | Hardware-enable for status register lock-down (BPL bit); disables WRSR execution when low and BPL=1 |
| 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 near pin for stable high-speed operation |
| HOLD# | Hold Control | Suspends ongoing SPI transaction without deselecting device; requires SCK low during assertion/deassertion |
| SCK | Serial Clock | Timing reference for all SPI transfers; supports both Mode 0 (SCK idle low) and Mode 3 (SCK idle high) |
| SI/SIO0 | Serial Data Input / Dual I/O | Accepts commands, addresses, and data in standard mode; bidirectional in Dual I/O (even bits D6/D4/D2/D0) |
Key Features
| Feature | Design Value |
|---|---|
| Dual I/O Interface Support | Enables 40 MHz read throughput using BBH instruction with address/data multiplexed across SIO0/SIO1 - cuts clock cycles by ~50% vs standard SPI read |
| Flexible Block Protection | Software-configurable BP0–BP2/TB bits plus hardware WP# pin allow hierarchical protection of top/bottom memory regions - prevents accidental firmware overwrite during field updates |
| Ultra-Low Power Standby | 3 µA typical in power-down mode - extends battery life in always-on IoT sensors and telematics modules |
| Fast Erase Performance | 40 ms sector erase and 80 ms 64 KByte block erase - accelerates firmware patch deployment in production test and field service workflows |
| AEC-Q100 Qualified | Automotive-grade reliability validation - meets stress testing requirements for Grade 2 (–40°C to +105°C) operation in safety-critical ECUs |
Applications
| Automotive Infotainment Boot Storage | Industrial PLC Firmware Repository |
|---|---|
|
Use Scenario: Storing boot loader and primary firmware image for head unit microcontroller with over-the-air update capability. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read and atomic sector erase for safe firmware rollback. Use Value: AEC-Q100 qualification ensures reliability in vehicle cabin environments; 40 MHz Dual I/O read speed reduces boot time by >30% vs legacy 25 MHz SPI flash. |
Use Scenario: Holding configuration data, ladder logic programs, and calibration tables in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Field-updatable persistent memory supporting secure write-protection and long-term data integrity. Use Value: 100,000-cycle endurance and >20-year retention guarantee operational continuity across 15+ year equipment lifecycles without memory replacement. |
| Medical Diagnostic Device Log Buffer | Smart Meter Firmware Vault |
|
Use Scenario: Capturing timestamped sensor diagnostics and error logs in portable ultrasound units requiring FDA-compliant data persistence. IC Role / Device Role / Timing Role: Low-power, high-reliability data logger with deterministic erase timing for regulatory audit trail management. Use Value: 3 µA power-down current enables multi-week battery operation between charges; sector-erase granularity isolates log segments from firmware partitions. |
Use Scenario: Securing metering firmware and cryptographic keys in ANSI C12.22-compliant smart electricity meters operating in outdoor utility cabinets. IC Role / Device Role / Timing Role: Tamper-resistant code vault with hardware-assisted write protection and extended temperature tolerance. Use Value: WP#/HOLD# pins and BPL-enabled status register lockdown prevent unauthorized firmware modification during physical access attempts. |
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), 1.8 V min supply, 105°C rating, but lacks HOLD# pin and dual-I/O instruction support (BBH) | Lower voltage operation suits ultra-low-power wearables; no HOLD# limits use in multi-master SPI bus arbitration scenarios | Select W25Q40EW only if 1.8 V compatibility is mandatory and HOLD# functionality is unused in target design |
| Cypress S25FL004K | 4 Mbit, 3.0–3.6 V supply, supports Quad SPI (QSPI) and XIP mode; higher pin count (16-pin SOIC/WSON) required | Enables execute-in-place for real-time MCU code execution; not pin-compatible due to extra IO2/IO3 pins and different pinout | Choose S25FL004K when QSPI bandwidth or XIP capability is needed - requires PCB redesign and firmware driver changes |
Compared with W25Q40EW and S25FL004K, the SST25PF040C-40V/SN uniquely balances AEC-Q100 compliance, dual-I/O throughput, HOLD# suspend capability, and USON footprint - making it optimal for automotive and industrial designs where pin count, thermal robustness, and transaction control are jointly constrained.
Availability
SST25PF040C-40V/SN is available at Aetrix Electronics and suitable for automotive infotainment, industrial PLC firmware, medical diagnostic logging, smart meter security, and edge AI inference model storage requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SST25PF040C-40V/SN 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-40V/SN belongs to Microchip's Serial Flash 25 Series, engineered for cost-sensitive, space-constrained embedded systems needing high endurance, low power, and automotive-grade qualification without sacrificing SPI compatibility.
FAQ
What is the maximum clock frequency supported by SST25PF040C-40V/SN for high-speed read operations?
The SST25PF040C-40V/SN supports up to 40 MHz for High-Speed Read (0BH), Fast-Read Dual-Output (3BH), and Fast-Read Dual I/O (BBH) instructions. This is verified in the DS20005397E datasheet Section 5.2–5.4 and confirmed by timing parameters tCH and tCL in AC characteristics. Standard Read (03H) is limited to 25 MHz. The 40 MHz capability directly enables faster boot and firmware load times in real-time systems.
Does SST25PF040C-40V/SN support both SPI Mode 0 and Mode 3, and how is this configured?
Yes, SST25PF040C-40V/SN natively supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1) without configuration. The device detects idle SCK state - low for Mode 0, high for Mode 3 - and samples SI on rising edges while driving SO on falling edges in either mode. This dual-mode compatibility eliminates host controller restrictions and simplifies migration from legacy SPI peripherals.
What package type does the /SN suffix indicate for SST25PF040C-40V/SN?
The /SN suffix in SST25PF040C-40V/SN specifies the 8-contact USON (Ultra Small Outline No-lead) package measuring 2 mm × 3 mm. This is explicitly defined in Microchip's ordering information (DS20005397E, page 2) and matches the pin diagram in Figure 2-1. The /SN variant is distinct from /SO (SOIC) and /WD (WDFN) versions and requires corresponding land pattern and reflow profile.
How does the HOLD# pin function during an active SPI transaction in SST25PF040C-40V/SN?
In SST25PF040C-40V/SN, HOLD# suspends an ongoing SPI sequence without deselecting the device: it activates when HOLD# falls coincident with SCK low, placing SO in high-impedance while SI and SCK remain valid. Communication resumes when HOLD# rises with SCK low. This behavior is detailed in Section 4.0.1 and Figure 4-2 of DS20005397E and enables bus arbitration in multi-peripheral systems without command restart overhead.
Can SST25PF040C-40V/SN be used in automotive applications, and what qualification does it hold?
Yes, SST25PF040C-40V/SN is AEC-Q100 qualified for Automotive Grade 2 (–40°C to +105°C), as stated in the "Features" section of DS20005397E. This qualification covers stress testing for temperature cycling, humidity, ESD, and vibration - validating its use in engine control modules, ADAS camera systems, and infotainment head units where reliability under harsh conditions is mandatory.
SST25PF040C-40V/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- SST25
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- 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-SOIC
SST25PF040C-40V/SN FAQ
1.How can I place an order for SST25PF040C-40V/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for SST25PF040C-40V/SN 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/SN reliable?
The price and inventory of SST25PF040C-40V/SN 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/SN is usually 5 days.
3.What payment methods are accepted for SST25PF040C-40V/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SST25PF040C-40V/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SST25PF040C-40V/SN?
SST25PF040C-40V/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SST25PF040C-40V/SN 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/SN?
For technical support, including SST25PF040C-40V/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SST25PF040C-40V/SN requirements.
6.How does Aetrix verify that SST25PF040C-40V/SN is sourced from the original manufacturer or authorized distributors?
All SST25PF040C-40V/SN 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/SN meets industry standards.
7.What is the process for return or replacement of SST25PF040C-40V/SN?
All SST25PF040C-40V/SN units undergo pre-shipment inspection (PSI). If there is an issue with SST25PF040C-40V/SN, 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/SN part is unused and in its original packaging.
Return procedure for SST25PF040C-40V/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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