If you are looking for a 40-Pin microcontroller with lots of peripheral support as well as I/O pin counts then the PIC81F4520 is a perfect choice. It has SPI, I2C, ADC, PWM and all. 16Kbit low power high-performance CMOS Microcontroller based on the Atmel AVR enhanced RISC architecture. With 1536 Bytes of data memory and 256 bytes of EEPROM.  It supports 13 channels of 10-bit Analog to Digital converter, 4 Timers, MSSP and USART.

For debugging and Programming, it has a JTAG interface for on-chip-debug. Maximum operating frequency is 40 Mhz. It has Program Memory of 32768 Bytes and 16384 instructions.

PIC18F4520 pinout:

PIC18F4520 features, Specification:

Features: 

• High current sink-source 25 mA/ 25 mA
• Three External Interrupts 
• Four Timer modules (Timer0 to Timer3) 
• Up to 2 Capture/Compare/PWM (CCP) modules: 

     - Capture is 16-bit, max. resolution 5.2 ns (TCY/16) 

    - Compare is 16-bit, max. resolution 83.3 ns (TCY) 

    - PWM output: PWM resolution is 1 to 10-bit 

• Enhanced Capture/Compare/PWM (ECCP) module:

    - Multiple output modes

    - Selectable polarity

    - Programmable dead time 

    - Auto-shutdown and auto-restart 

• Enhanced USART module: LIN bus support 
• Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all 4 modes) and I2C™ Master and Slave modes 
• 10-Bit, Up to 13-Channel Analog-to-Digital Converter (A/D) module with Programmable Acquisition Time 
• Dual Analog Comparators with Input Multiplexing

Specification:

Program Memory Type  : Flash

Program Memory Size (KB)   : 32

CPU Speed (MIPS/DMIPS)    :  10

SRAM (B)       : 1536

Temperature Range (°C)      : -40 to 125

Operating Voltage Range (V)    :  2 to 5.5

Pin Count       :  40

Timers            :  1x 8-bit, 3 x 16-bit

ADC Input      :  13 ch, 10-bit

Capture/Compare/PWM Peripherals           :  1 CCP, 1 ECCP

Digital Communication Peripherals            :  1-UART, 1-SPI, 1-I2C

Data EEPROM/HEF (bytes)  : 256

PIC18F4520 Applications:

• Data Processing
• Sensor Integration
• Data retention
• Communication between PC and Microcontroller
• Small Industrial applications.

PIC18F4520 Dimension and footprint:

Example Projects on PIC18F4520:

PIC to PIC Communication using RF Module

Additional Resources:

PIC18F4520 Datasheet

Package Contains

1x PIC18F4520