The PT2249A is a remote control encoder designed for use in a variety of wireless remote control applications. It's manufactured by Princeton Technology Corporation and belongs to their family of encoder ICs utilizing CMOS technology.

Applications:

• Wireless remote control systems
• Remote controlled toys
• Security Systems
• Garage Door Openers
• Automotive remote controls

Features:

• CMOS Technology
• Low power consumption
• Multiple address options
• Data pins for function control
• External resistor for frequency adjustment
• Available in DIP and SOP packages

Benefits:

• Long Battery Life: Low power consumption extends the operational time of battery powered remotes.
• Increased Security: Multiple address lines allow a large number of unique address codes, minimizing the risk of interference.
• Flexible Functionality: The available data pins enable the control of many functions.
• Frequency Adjustment: The external resistor provides an easy way to adjust frequency.

Additional Details:

The PT2249A encodes address and data information which modulates an RF carrier when the transmit enable pin is activated. The address and data are programmed by setting the corresponding pins to either a high or low logic level. The IC should be paired with a matching decoder IC. The oscillator frequency is determined by an external resistor connected between OSC1 and OSC2 pins. It operates on a voltage range of 2.4V to 12V.