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8 Bit MCU, PSOC3, PSOC 3 Family CY8C38xx Series Microcontrollers, 67 MHz, 64 KB, 8 KB, 100 Pins

The CY8C3866AXI-040 is an 8-bit PSoC® true System-on-Chip Microcontroller Unit with memory, analog, and digital peripheral functions. The CY8C38 family offers a modern method of signal acquisition, signal processing, and control with high accuracy, high bandwidth, and high flexibility. Analog capability spans the range from thermocouples to ultrasonic signals. The CY8C38 family can handle dozens of data acquisition channels and analog inputs on every general-purpose input/output GPIO pin. The CY8C38 family is also a high-performance configurable digital system with some part numbers including interfaces such as USB, multi-master inter-integrated circuit (I²C), and controller area network (CAN). In addition to communication interfaces, the CY8C38 family has an easy-to-configure logic array, flexible routing to all I/O pins, and a high-performance single cycle 8051 microprocessor core.

  • Single-cycle 8051 CPU
  • Multiply and divide instructions
  • 24-channel Direct memory access (DMA) with multilayer AHB bus access
  • Any GPIO to any digital or analog peripheral route ability
  • LCD direct drive from any GPIO, up to 46 x 16 segments
  • CapSense® support from any GPIO
  • 1.2 to 5.5V I/O Interface voltages, up to four domains
  • Maskable, independent IRQ on any pin or port
  • Schmitt-trigger transistor-transistor logic (TTL) inputs
  • All GPIO configurable as open-drain high/low, pull-up/pull-down, High Z, or strong output
  • Configurable GPIO pin state at power-on reset (POR)
  • 25mA Sink on SIO
  • Full CAN 2.0b 16 Receiver, 8 Transmitter buffers
  • USB 2.0 certified Full-Speed (FS) 12Mbps peripheral interface using the internal oscillator
  • 67MHz, 24-bit Fixed point digital filter block (DFB) to implement FIR and IIR filters
  • Serial peripheral interface (SPI), universal asynchronous transmitter-receiver (UART), and I²C
  • Cyclic redundancy check (CRC)
  • Pseudorandom sequence (PRS) generator
  • Local interconnect network (LIN) bus 2.0
  • Quadrature decoder

Technical Doc: CY8C3866AXI-040 Datasheet

Additional information

Manufacturer Part No.




Product Range

PSOC 3 Family CY8C38xx Series Microcontrollers


Available for back order

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RoHS Compliant

CPU Speed

Program Memory Size

RAM Memory Size

No. of Pins

MCU Case Style

No. of I/O's

Embedded Interface Type

Supply Voltage Min

Supply Voltage Max

MCU Family

MCU Series


RoHs Phthalates Compliant


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