The PT 2272 is a low-power CMOS decoder IC designed for remote control applications. Manufactured by PT, this component is typically paired with the PT 2262 encoder to form a complete wireless communication system. The PT 2272 decodes the encoded signals transmitted by the PT 2262 and outputs the corresponding data, making it ideal for controlling devices such as garage doors, alarms, home automation systems, and other wireless remote-controlled devices.
The PT 2272 is available in multiple configurations, depending on the number of data output pins and the operating mode. Below are the key technical details:
The PT 2272 is available in DIP-18 and DIP-20 packages. Below is the pin configuration for the DIP-18 package:
Pin Number | Pin Name | Description |
---|---|---|
1-6 | A0-A5 | Address input pins (tri-state: high, low, or floating) |
7 | VSS | Ground (0V) |
8-11 | D0-D3 | Data output pins (decoded signal output) |
12 | VT | Valid transmission indicator (high when a valid signal is received) |
13-18 | A6-A11 | Address input pins (tri-state: high, low, or floating) |
For the DIP-20 package, additional data output pins (D4-D5) are available, depending on the specific model.
Address Configuration:
Power Supply:
Data Outputs:
Valid Transmission (VT) Pin:
The PT 2272 can be interfaced with an Arduino UNO to read the decoded data and control devices. Below is an example code snippet:
// PT 2272 Decoder with Arduino UNO
// Connect D0-D3 of PT 2272 to Arduino digital pins 2-5
// Connect VT pin of PT 2272 to Arduino digital pin 6
#define VT_PIN 6 // Valid Transmission pin
#define D0_PIN 2 // Data output pin D0
#define D1_PIN 3 // Data output pin D1
#define D2_PIN 4 // Data output pin D2
#define D3_PIN 5 // Data output pin D3
void setup() {
pinMode(VT_PIN, INPUT); // Set VT pin as input
pinMode(D0_PIN, INPUT); // Set D0 pin as input
pinMode(D1_PIN, INPUT); // Set D1 pin as input
pinMode(D2_PIN, INPUT); // Set D2 pin as input
pinMode(D3_PIN, INPUT); // Set D3 pin as input
Serial.begin(9600); // Initialize serial communication
}
void loop() {
if (digitalRead(VT_PIN) == HIGH) { // Check if a valid signal is received
// Read data output pins
int d0 = digitalRead(D0_PIN);
int d1 = digitalRead(D1_PIN);
int d2 = digitalRead(D2_PIN);
int d3 = digitalRead(D3_PIN);
// Print the decoded data to the Serial Monitor
Serial.print("Data: ");
Serial.print(d0);
Serial.print(d1);
Serial.print(d2);
Serial.println(d3);
}
}
No Output on Data Pins:
Interference or Noise:
Invalid Signal Reception:
Q: Can the PT 2272 drive high-power devices directly?
A: No, the data output pins of the PT 2272 can only source or sink a small amount of current. Use external transistors, relays, or motor drivers to control high-power devices.
Q: What is the maximum range of the PT 2272 and PT 2262 system?
A: The range depends on the transmitter power and environmental conditions. Typically, it ranges from 50 to 100 meters in open spaces.
Q: Can I use the PT 2272 with other encoders?
A: The PT 2272 is specifically designed to work with the PT 2262 encoder. Using it with other encoders may not yield reliable results.