The PT2128A-C51, manufactured by Princeton Technology Corp (PTC), is a CMOS-based remote control encoder IC. Designed for use in a wide array of remote control applications, it encodes input data for transmission via infrared (IR) signals. This IC is popular for its combination of cost-effectiveness and low power consumption. The 'A' likely indicates a specific revision of the chip, while 'C51' specifies a unique encoding configuration or code set.

Applications

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

Features

• CMOS Technology: Offers low power consumption and excellent noise immunity.
• Multiple Key Inputs: Allows encoding of multiple distinct functions.
• Infrared (IR) Transmission: Transmits signals wirelessly via IR light.
• Integrated Oscillator Circuit: Simplifies design and reduces external component count.
• Customizable Codes: Supports custom encoding codes for tailored functionality.
• Low Standby Current: Minimizes power drain when the remote is not actively used.

Benefits

• Cost-Effective Solution: Provides a budget-friendly option for encoding remote control signals.
• Prolonged Battery Life: Low power consumption extends battery lifespan in remote control devices.
• Reliable Operation: CMOS technology ensures stable performance even in noisy environments.
• Simplified Integration: Easy to incorporate into remote control designs due to a straightforward pin layout.
• Flexible Functionality: Customizable encoding supports a variety of functions specific to the target device.

Additional Details

The PT2128A-C51 typically operates on a 3V power supply. The specific encoding format and key assignments can be configured to meet the needs of the application. External components, such as a ceramic resonator or crystal oscillator, are used to determine the carrier frequency of the IR signal. The output pin is connected to an IR LED for transmitting the encoded data. Available in common packages like DIP or SOP, the PT2128A-C51 provides an easy-to-use and efficient solution for remote control encoding.