Microchip PIC16C57C-04I/SO 8-Bit OTP Microcontroller Overview

The Microchip PIC16C57C-04I/SO is a high-performance, 8-bit microcontroller (MCU) from Microchip's extensive PIC® (Peripheral Interface Controller) family. Fabricated with low-power, high-speed CMOS technology, this MCU is built around an efficient RISC architecture, offering a compelling blend of performance, cost-effectiveness, and compact design for a wide array of embedded control applications.

A defining characteristic of this device is its One-Time Programmable (OTP) program memory. This feature is ideal for high-volume production runs where the firmware is fully debugged and finalized, as it allows for a lower unit cost compared to MCUs with erasable memory. However, it means the program code cannot be erased and reprogrammed after being written.

Housed in a 28-pin SOIC (Small Outline Integrated Circuit) package, the 'SO' suffix denotes the package type, while the '-04' indicates its operational speed. The device is rated for an industrial temperature range (-40°C to +85°C), signified by the 'I' in its part number.

Core Architectural Features:

8-Bit RISC CPU: The core employs a Reduced Instruction Set Computer (RISC) architecture, featuring only 33 single-word instructions for simplified programming and fast execution. Most instructions are completed in a single clock cycle, enabling high throughput.

Clock Speed: With a maximum operating frequency of 4 MHz (DC to 4 MHz), it achieves a instruction cycle time of 1 µs, providing responsive control for real-time applications.

Memory Configuration:

Program Memory (OTP ROM): 2K x 12 words of one-time programmable memory for storing firmware.

Data Memory (RAM): 72 bytes of general-purpose SRAM for data manipulation during operation.

Data EEPROM: 128 bytes of Electrically Erasable PROM for storing non-volatile data, such as calibration constants or user settings, which can be updated during operation.

I/O Ports and Peripherals: The device features 20 I/O pins, which are highly flexible and can be configured on-the-fly. Key peripherals include:

A built-in 8-bit real-time clock/counter (TMR0) with an 8-bit programmable prescaler.

A powerful watchdog timer (WDT) with its own on-chip RC oscillator for reliable operation and protection against software hangs.

Low Power Design: Utilizing CMOS technology, the PIC16C57C supports various power-saving SLEEP modes, making it suitable for battery-powered or energy-conscious applications.

Target Applications:

Due to its robust feature set and OTP nature, the PIC16C57C-04I/SO is perfectly suited for applications including:

Automotive controls (e.g., sensors, actuators)

Industrial automation and control systems

Consumer electronics and appliances

Power tools and motor control

Security systems and access control panels

ICGOOODFIND: The Microchip PIC16C57C-04I/SO stands as a reliable and cost-optimized solution for fixed-code embedded control. Its OTP memory structure makes it a strategic choice for mass-produced, end-product designs where firmware stability is guaranteed, offering a balance of core performance, essential peripherals, and industrial-grade reliability.

Keywords:

1. OTP Memory

2. 8-Bit RISC

3. Embedded Control

4. Industrial Temperature

5. Microcontroller