16C55S

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16C55S Technical Summary

Overview

The PIC16C55S is a member of Microchip's PIC16C5X family of 8-bit microcontrollers. It is a cost-effective, high-performance CMOS microcontroller with a fully static design, integrating a RISC-based CPU, EPROM program memory, RAM data memory, and I/O ports into a single chip. The device is designed for embedded control applications, offering a balance of performance, power efficiency, and ease of use.

Key Features

• 8-bit RISC Architecture – Efficient single-cycle execution for most instructions.
• On-Chip EPROM Program Memory – Provides non-volatile storage for firmware.
• RAM Data Memory – Supports variable storage during runtime.
• 8-bit Real-Time Clock/Counter (TMR0) – Includes an 8-bit prescaler for flexible timing operations.
• Multiple I/O Ports – Configurable bidirectional I/O pins for interfacing with external devices.
• Low-Power Consumption – CMOS technology ensures efficient power usage.
• Wide Operating Voltage Range – Supports various power supply conditions.
• High Noise Immunity – Robust design for reliable operation in electrically noisy environments.

Applications

The PIC16C55S is suitable for a wide range of embedded control applications, including:

• Consumer electronics (remote controls, toys, small appliances)
• Industrial automation (sensors, motor control, small machinery)
• Automotive systems (basic control modules, lighting systems)
• Security systems (keypad entry, alarm controllers)
• Medical devices (simple monitoring equipment)

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_DD): -0.3V to +7.5V
• Input Voltage (V_IN): -0.3V to V_DD + 0.3V
• Operating Temperature Range: -40°C to +85°C (industrial)
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_DD): 2.0V to 6.0V
• Operating Temperature: -40°C to +85°C
• Clock Frequency: DC to 20 MHz (dependent on V_DD)

DC Characteristics

• Input Low Voltage (V_IL): ≤ 0.15 V_DD
• Input High Voltage (V_IH): ≥ 0.25 V_DD
• Output Low Voltage (V_OL): ≤ 0.6V (I_OL = 8.7 mA)
• Output High Voltage (V_OH): ≥ V_DD - 0.7V (I_OH = -3.0 mA)

AC Characteristics

• Instruction Cycle Time: 200 ns (at 20 MHz)
• Timer0 Clock Input Frequency: DC to 50 MHz
• Reset Pulse Width: 100 ns (minimum)

Package Information

The PIC16C55S is available in multiple package options to suit different application requirements:

• 18-Pin PDIP (Plastic Dual In-Line Package) – Through-hole mounting, suitable for prototyping.
• 18-Pin SOIC (Small Outline Integrated Circuit) – Surface-mount package for compact designs.
• 20-Pin SSOP (Shrink Small Outline Package) – Ultra-compact surface-mount option.

Pin Configuration (18-Pin PDIP Example)

• RA0-RA3: Port A bidirectional I/O pins
• RB0-RB7: Port B bidirectional I/O pins
• MCLR: Master Clear (Reset) input
• OSC1/CLKIN: Oscillator input
• OSC2/CLKOUT: Oscillator output
• V_DD: Positive supply voltage
• V_SS: Ground reference

Development Support

Microchip provides comprehensive development tools for the PIC16C55S, including:

• MPLAB IDE – Integrated development environment for code writing, simulation, and debugging.
• PICkit™ Programmers – Affordable in-circuit debuggers and programmers.
• Third-Party Compilers – Support for assembly and C language development.
• Application Notes & Reference Designs – Technical documentation to assist in implementation.

Conclusion

The PIC16C55S is a versatile, low-cost microcontroller ideal for embedded control applications requiring an 8-bit architecture. With its robust feature set, reliable performance, and extensive development support, it remains a popular choice for engineers designing cost-sensitive and power-efficient systems.

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