SST25PF040C-40I/SN Microchip Integrated Circuit (Small Outline Packages) In Stock
The SST25PF040C-40I/SN is a 4 Mbit (512 KB) SPI serial NOR flash memory from Microchip operating at 3.3 V with a 40 MHz clock speed in an 8-pin SOIC package. It provides 100,000 write/erase cycle endurance and 20-year data retention, making it reliable for firmware storage. Ideal for embedded systems, consumer electronics, and industrial devices needing compact non-volatile code and data storage.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- SST25PF040C-40I/SN Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.7700(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 4 Mbit (512 KB) NOR flash with SPI serial interface up to 40 MHz clock
- 3.3 V operating voltage compatible with modern low-voltage microcontrollers and SoCs
- 100,000 write/erase cycle endurance for reliable field-updateable firmware storage
- 20-year minimum data retention ensuring long-term non-volatile memory integrity
- 8-pin SOIC-8 package enabling simple two-layer PCB integration
- JESD-609 e3 lead-free compliant, RoHS-ready for global product certification
Applications
The SST25PF040C-40I/SN is used as firmware and boot code storage in embedded microcontroller systems, network routers, and IoT gateway devices where 512 KB of non-volatile SPI flash provides sufficient space for application code and configuration data. Consumer electronics including set-top boxes, smart home controllers, and USB peripherals rely on its 40 MHz SPI speed for fast boot sequences and in-system firmware updates. Industrial automation panels and measurement instruments also use it for storing calibration tables and operating parameters that must survive power cycling over 100,000 update cycles.
Specifications
| Manufacturer Package Code | SOIC-8 |
| Factory Lead Time | 11Weeks |
| YTEOL | 18 |
| Clock Frequency-Max (fCLK) | 40MHz |
| Data Retention Time-Min | 20 |
| Endurance | 100000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Memory Density | 4194304bit |
| Memory IC Type | FLASH |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 524288words |
| Number of Words Code | 512000 |
| Operating Mode | SYNCHRONOUS |
| Organization | 512KX8 |
| Output Characteristics | 3-STATE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.23 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 3.3V |
| Screening Level | TS 16949 |
| Serial Bus Type | SPI |
| Standby Current-Max | 0.00001A |
| Supply Current-Max | 0.015mA |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 2.3V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Type | NOR TYPE |
| Write Protection | HARDWARE/SOFTWARE |
| ## SST25PF040C-40I/SN Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SST25PF040C-40I/SN:
suggested
suggested
Frequently Asked Questions
How fast can the SST25PF040C-40I/SN transfer data, and does this meet embedded system boot requirements?
The SST25PF040C-40I/SN supports a maximum SPI clock frequency of 40 MHz, enabling sequential read throughput of up to 5 MB/s. For a typical embedded application with 256 KB of firmware code, this means the entire image can be read into RAM in approximately 51 ms, which is well within the boot-time budgets of most microcontroller systems and suitable for fast power-on startup in consumer electronics and industrial controllers.
What is the write/erase endurance of the SST25PF040C-40I/SN, and how does this affect firmware update planning?
The SST25PF040C-40I/SN is rated for 100,000 write/erase cycles per sector, meaning a device receiving one firmware update per day would reach this endurance limit in approximately 274 years of continuous operation. For typical embedded systems updated weekly or monthly during field maintenance, the 100,000 cycle endurance is effectively unlimited, removing endurance as a reliability concern and allowing designers to support frequent over-the-air firmware updates without wear-leveling complexity.
How long does the SST25PF040C-40I/SN retain data when unpowered, and what does this mean for storage in distribution?
The SST25PF040C-40I/SN guarantees a minimum data retention time of 20 years at room temperature when the device is unpowered. This means programmed parts can be stored in a warehouse or on distributor shelves for years without risk of data loss, and finished products shipped with pre-loaded firmware are assured of retaining their factory programming throughout a normal 10-year product service life with significant margin to spare.
When would an engineer choose the SST25PF040C-40I/SN over a larger 16 Mbit SPI flash device?
An engineer selects the 4 Mbit SST25PF040C-40I/SN when the application's firmware and configuration data fit within 512 KB and cost optimization is a priority, since 4 Mbit NOR flash devices are typically priced 30% to 50% lower than 16 Mbit alternatives. Simple microcontroller-based products such as smart plugs, BLE sensor nodes, or motor driver boards with fixed 100 KB to 400 KB firmware images benefit from right-sizing storage to the 4 Mbit density rather than paying for unused capacity in a larger die.
Related Guides
CL31A107MQHNNNE 1206 100 uF MLCC Selection Guide
How to choose CL31A107MQHNNNE and related 1206 MLCCs for low-voltage bulk capacitance and regulator stability.
Jul 2, 2026
CL05B103KB5NNNC 0402 10 nF X7R MLCC Selection Guide
How to choose CL05B103KB5NNNC and related 0402 MLCCs for bypassing, filtering, voltage derating, and sourcing.
Jul 2, 2026
ADAQ7768-1 Design Guide for Precision Vibration and Dynamic Signal Measurement
Design ADAQ7768-1 precision data acquisition channels for vibration and dynamic sensing with the right bandwidth, reference, clock, and layout choices.
Jun 30, 2026
AD5204BRZ10 Design Guide for SPI-Controlled Gain and Offset Calibration
Design AD5204BRZ10 digital potentiometer calibration loops with bounded trim span, safe wiper current, clean SPI routing, and reliable startup codes.
Jun 30, 2026
Why Buy from FindMyChip
About Microchip
Microchip is a leading electronic component manufacturer. FindMyChip sources Microchip ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.0800 | $1.08 |
| 2+ | $0.8110 | $1.62 |
| 5000+ | $0.7750 | $3875.00 |
| 7500+ | $0.7720 | $5790.00 |
| 10000+ | $0.7700 | $7700.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”