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PT2272 M4 Decoder IC

PT2272 M4 Decoder IC

Overview of the PT2272 M4 Decoder IC

The PT2272 M4 is a decoder integrated circuit (IC) manufactured by Princeton Technology. It is commonly used in infrared (IR) receiver modules to decode modulated IR signals from remote controls. Some key features of this IC include:

  • Capable of decoding signals from common IR transmission protocols like NEC, RC5, RC6 etc.
  • Low power consumption.
  • Built-in bandpass filter.
  • High noise immunity.
  • Wide supply voltage range.

Pin Configuration

The PT2272 M4 has 8 pins with the following functions:

2Supply Voltage
3Data Output
4LED Output
5Carrier Frequency Adjust
6Bandpass Filter Control
7Modulation Input


Some common applications of the PT2272 M4 decoder IC include:

  • Infrared receiver modules in consumer electronics for remote control.
  • IR communication systems.
  • IR toy cars, robots etc.
  • Alarm systems.
  • IoT devices.

The PT2272 allows these devices and systems to receive and decode modulated IR signals from standard remote controls. Its high noise immunity makes it well suited for noisy environments.


Some of the main advantages of using the PT2272 M4 decoder IC:

  • Low power consumption suitable for battery powered applications.
  • Supports a wide range of carrier frequencies and modulation schemes.
  • Built-in bandpass filter simplifies design.
  • High noise immunity for reliable performance.
  • Wide supply voltage range.
  • Compact 8-pin DIP package.
  • Cost effective and readily available.

Frequently Asked Questions

Here are some common questions about the PT2272 M4 decoder IC:

Q: What is the typical supply voltage range for the PT2272?

A: The PT2272 can operate with supply voltages from 2.5V to 5.5V.

Q: What carrier frequencies can the PT2272 support?

A: It can support carrier frequencies from 30kHz to 60kHz. The center frequency is adjustable via the CF pin.

Q: How does the built-in bandpass filter work?

A: The bandpass filter filters out noise outside the expected IR signal frequency range. The filter cutoff frequency is controlled via the BPF pin.

Q: What is the typical standby current consumption?

A: The standby current when no signal is present is typically less than 1μA.

Q: What modulation schemes are supported?

A: The PT2272 supports several common modulation schemes including NEC, RC5, RC6, Philips RC-MM, etc.

This covers the key points about the PT2272 M4 decoder IC and its usage. Let me know if you need any clarification or have additional questions!

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