The PT2128-C81-S, manufactured by Princeton Technology Corp (PTC), is a remote control encoder IC. This CMOS-based IC encodes data and transmits it via an infrared (IR) signal for use in various remote control applications. It's favored for its cost-effectiveness and minimal power consumption. 'C81' typically relates to a specific code configuration, and '-S' likely denotes a specific packaging or version variant.

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: Provides low power consumption and high noise immunity.
• Multiple Key Inputs: Supports encoding for multiple button functions.
• Infrared (IR) Transmission: Uses IR light for wireless communication.
• Integrated Oscillator: Streamlines design with a built-in oscillator circuit.
• Customizable Codes: Allows for custom encoding configurations for specific product needs.
• Low Standby Current: Reduces power drain when the remote is not active.

Benefits

• Economical Solution: A low-cost option for remote control encoding applications.
• Extended Battery Life: Low power consumption extends battery lifespan.
• Consistent Performance: Ensures reliable operation thanks to CMOS technology's noise immunity.
• Simplified Integration: Easy to incorporate into remote control designs.
• Adaptable Functionality: Allows for customization of remote control functions.

Additional Details

The PT2128-C81-S usually operates on a 3V power supply. The exact encoding format and key assignments can be configured depending on the requirements. External components, like ceramic resonators or crystal oscillators, are often used to set the carrier frequency of the IR signal. The output pin connects to an IR LED for signal transmission. Commonly packaged in DIP or SOP formats.