Microchip PIC16C621AT-20I/SO 8-Bit Microcontroller Overview

The Microchip PIC16C621AT-20I/SO is an 8-bit microcontroller belonging to Microchip’s robust PIC16C6xx family. Built on a high-performance RISC architecture, this microcontroller is engineered for efficiency, reliability, and cost-effectiveness in a wide range of embedded applications. Housed in an 18-pin SOIC (SO) package, the device is designed for surface-mount technology, making it suitable for space-constrained PCB designs.

Operating at a maximum frequency of 20 MHz, the PIC16C621A delivers a solid balance of processing power and energy efficiency. Its core features a reduced instruction set with only 35 single-word instructions, simplifying programming while enabling rapid execution. Most instructions are completed in a single cycle, significantly enhancing real-time performance.

The microcontroller includes 2 KB of OTP (One-Time Programmable) EPROM for program storage, offering a reliable and secure solution for code integrity. It is also equipped with 128 bytes of RAM for data handling and temporary storage during operation. A key feature of the PIC16C621A is its integrated analog comparator module, which allows for direct interface with analog signals without requiring an external comparator, thus reducing both component count and system cost.

With 13 I/O pins, the device provides ample digital interface capabilities. These pins are programmable and offer individual direction control, supporting applications ranging from simple button inputs to driving LEDs or communicating with other peripherals. The inclusion of a watchdog timer (WDT) with an independent internal oscillator enhances system reliability by preventing software lock-ups, a critical feature in safety-sensitive applications.

The PIC16C621A is well-suited for consumer electronics, industrial control, automotive subsystems, and other embedded systems where low power consumption and compact form factor are essential. Its OTP memory makes it ideal for mid-volume production runs where firmware stability is guaranteed.

ICGOOODFIND: The PIC16C621AT-20I/SO is a cost-efficient, high-performance 8-bit microcontroller with integrated analog capabilities, suited for space-conscious and power-sensitive embedded designs.

Keywords:

PIC16C621A

8-Bit Microcontroller

20 MHz

OTP Memory

Analog Comparator