• CY8C3866AXI-040 PG-TQFP-100
CY8C3866AXI-040 PG-TQFP-100


100-pin TQFP package for high integration requirements


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Overview of CY8C3866AXI-040

The CY8C3866AXI-040 is a programmable system-on-chip (PSoC) device featuring an ARM Cortex-M3 processor and programmable analog and digital resources. It offers a versatile platform for embedded system development with its integrated components and configurable architecture.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VDDA: Analog power supply
  • VDDD: Digital power supply
  • VSSA: Analog ground
  • VSSD: Digital ground
  • VDDIO: I/O power supply
  • VSSIO: I/O ground
  • VDDCORE: Core power supply
  • VSSCORE: Core ground
  • P0.x - P12.y: Programmable I/O pins
  • XRES: Device reset
  • SWDIO: Serial wire debug data line
  • SWCLK: Serial wire debug clock line
  • XTAL: Crystal oscillator input

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the CY8C3866AXI-040 for a visual representation.

Key Features

  • ARM Cortex-M3 Processor: Equipped with a powerful ARM processor for efficient embedded system programming.
  • Programmable Analog and Digital Resources: Offers configurable analog and digital blocks for custom peripheral integration.
  • Flexible I/O Configuration: Provides a range of programmable I/O pins for versatile connectivity options.
  • Integrated Components: Includes ADCs, DACs, comparators, PWMs, and serial communication interfaces for comprehensive system design.
  • Low-Power Operation: Features low-power modes for energy-efficient applications and battery-powered devices.

Note: For detailed technical specifications, please refer to the CY8C3866AXI-040 datasheet.


  • Embedded System Development: Ideal for prototyping and developing embedded systems with customizable analog and digital functions.
  • IoT Devices: Suitable for Internet of Things (IoT) applications requiring sensor interfacing and connectivity features.
  • Industrial Automation: Used in industrial automation systems for control, monitoring, and data processing tasks.


The CY8C3866AXI-040 is a versatile programmable system-on-chip device that combines processing power with flexible analog and digital resources, enabling innovative embedded system designs.

Usage Guide

  • Power Supply: Connect the various power supply pins to the corresponding voltage sources as per the datasheet recommendations.
  • I/O Connections: Use the programmable I/O pins for interfacing with external components and peripherals.
  • Programming: Develop firmware using the ARM Cortex-M3 processor and configure the device's analog and digital blocks for specific applications.

Frequently Asked Questions

Q: Is programming the CY8C3866AXI-040 complex?
A: Programming the CY8C3866AXI-040 involves standard embedded software development practices and can be simplified with Cypress's development tools.

Q: Can the device operate at low voltages?
A: The CY8C3866AXI-040 supports a wide voltage range for various power supply requirements, including low-voltage operation.


For similar functionalities, consider these alternatives to the CY8C3866AXI-040:

  • CY8C3866AXI-040T: A temperature-qualified version of the CY8C3866AXI-040 for extended operating temperature ranges.
  • CY8C3866AXI-040PV: A power-optimized variant of the CY8C3866AXI-040 offering enhanced energy efficiency features.



The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

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productClassification COM productStatusInfo active and preferred
hfgr B packageName PG-TQFP-100
pbFree yes moistureProtPack DRY
orderingCode SP005642859 fourBlockPackageName PG-TQFP-100-801
rohsCompliant yes opn CY8C3866AXI-040
completelyPbFree undefined sapMatnrSali SP005642859

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