Microchip PIC16F628A-I/SO 8-Bit Flash Microcontroller, SOIC-18

The Microchip PIC16F628A-I/SO is a powerful and efficient 8-bit flash-based CMOS microcontroller built with advanced nanoWatt technology. This integrated circuit is designed for applications where low power consumption, high reliability, and system cost reduction are paramount. It employs a sophisticated Harvard RISC architecture, featuring separate instruction and data buses for efficient processing.

A key benefit is its enhanced core, which includes an eight-level deep hardware stack and support for multiple internal and external interrupt sources, allowing for responsive and complex program execution. The two-stage instruction pipeline enables most instructions to complete in a single cycle, maximising throughput. With a total of 35 instructions and a large register set, it offers a flexible platform for embedded control.

Integrated Features for System Optimisation

This device incorporates numerous features to minimise external component count, thereby enhancing overall system reliability and reducing power draw. Notable integrated functionalities include a 4MHz internal oscillator, a 128-byte EEPROM for data storage, a programmable Brown-Out Reset (BOR), and a watchdog timer with its own independent oscillator. It also supports low-voltage programming and offers programmable voltage reference (VREF), a power-saving sleep mode, and high current sink/source capability for direct LED drive.

Technical Specifications & Applications

With a maximum operating frequency of 20MHz, 3.5KB of program memory, and 224 bytes of RAM, this microcontroller is well-suited for a wide array of demanding applications. Its 16 I/O pins and USART interface provide ample connectivity options. It operates across a broad supply voltage range from 3V to 5.5V and can withstand temperatures from -40°C to 85°C, making it robust for challenging environments.

Engineers and developers favour the PIC16F628A for its blend'