The PT2128A-C31, manufactured by Princeton Technology Corp (PTC), is a remote control encoder IC using CMOS Technology. Designed for a variety of remote control applications, this IC encodes input data and transmits it via an infrared (IR) signal. It's frequently used in applications where low power consumption and cost efficiency are crucial factors. The 'A' likely refers to a specific revision, and 'C31' could denote a specific code or configuration.

Applications

• Television (TV) remote controls
• DVD player remote controls
• Set-top box (STB) remote controls
• Audio equipment remote controls
• Air conditioner remote controls

Features

• CMOS Technology: Delivers low power consumption and high noise immunity.
• Multiple Key Inputs: Encodes signals from multiple button presses.
• Infrared (IR) Transmission: Uses IR light for remote control communication.
• Built-in Oscillator: Simplifies circuit design with an integrated oscillator.
• Customizable Encoding Codes: Supports tailoring encoding codes for specific product needs.
• Low Standby Current: Minimizes power usage when the remote is not in active use.

Benefits

• Economical Solution: Presents a low-cost option for remote control encoding.
• Extended Battery Life: Reduced power consumption extends the operational life of the remote control's batteries.
• Consistent Performance: Reliable operation and noise immunity are ensured by CMOS technology.
• Streamlined Integration: Simple pin configuration and minimal need for external components makes it easy to integrate.
• Adaptable Functionality: Allows for customizing remote control features to suit specific product requirements.

Additional Details

The PT2128A-C31 typically operates with a 3V power supply. The specific encoding format and key assignments are tailored based on the application. External components such as a ceramic resonator or crystal oscillator fine-tune the IR signal's carrier frequency. The output pin connects to an IR LED to transmit the encoded data. The IC is often found in DIP or SOP packages, ensuring easy integration into different PCB designs.