Processor: It is based on the 8-bit PIC architecture, specifically the PIC16 family.

CPU Speed: The maximum CPU speed of the PIC16F873-04/SP is 4 MHz.

Flash Memory: It has 7.37 KB (8192 words) of flash program memory for storing the user’s program code.

RAM: The microcontroller has 192 bytes of RAM for data storage.

I/O Pins: It has a total of 22 I/O pins, which can be configured as digital inputs or outputs.

Timers: The PIC16F873-04/SP features three timers: Timer0, Timer1, and Timer2. These timers can be used for various timing and counting purposes.

Analog-to-Digital Converter (ADC): It includes an 8-channel, 10-bit ADC module that can convert analog signals into digital values.

Serial Communication: The microcontroller supports multiple serial communication protocols, including UART (Universal Asynchronous Receiver-Transmitter) and SPI (Serial Peripheral Interface).

Interrupts: It has several interrupt sources that can be used to handle external events and improve the responsiveness of the system.

Power-Saving Features: The PIC16F873-04/SP includes power-saving features such as a low-power sleep mode, which helps conserve energy in battery-powered applications.

Operating Voltage: It operates at a voltage range of 2.0V to 5.5V, making it suitable for a variety of applications.

Package: The PIC16F873-04/SP is available in a 28-pin plastic DIP (Dual Inline Package) or SPDIP (Shrink Plastic Dual Inline Package).