How to Use TIMER CY6Y-1P4: Examples, Pinouts, and Specs

The CY6Y-1P4 is a versatile programmable timer integrated circuit (IC) designed for timing applications in electronic circuits. It offers precise control over timing intervals and can be configured for a wide range of applications. This IC is commonly used in delay circuits, pulse generation, and timing control systems. Its compact design and flexibility make it a popular choice for both hobbyists and professional engineers.

• Delay circuits for industrial automation
• Pulse generation for signal processing
• Timing control in embedded systems
• Sequential event triggering
• LED blinking and motor control timing

• Operating Voltage: 3V to 15V DC
• Current Consumption: 5mA (typical) at 5V
• Timing Range: 1ms to 10 minutes (programmable via external components)
• Output Type: Open-collector output
• Output Current: Maximum 50mA
• Temperature Range: -40°C to +85°C
• Package Type: 8-pin DIP or SOIC

The CY6Y-1P4 has an 8-pin configuration. The table below describes each pin:

1. Power Supply: Connect the VCC pin to a DC power source (3V to 15V) and the GND pin to ground.
2. Timing Configuration:
   • Use an external resistor (R) and capacitor (C) connected to the DISCHARGE and THRESHOLD pins to set the desired timing interval.
   • The timing interval can be calculated using the formula:
     [ T = 1.1 \times R \times C ] where ( T ) is the timing interval in seconds, ( R ) is the resistance in ohms, and ( C ) is the capacitance in farads.
3. Triggering: Apply a low signal to the TRIG pin to start the timing cycle.
4. Output: The OUT pin will go high (or low, depending on configuration) for the duration of the timing interval.
5. Reset: To interrupt the timing cycle, apply a low signal to the RESET pin.

• Use decoupling capacitors (e.g., 0.1µF) near the VCC pin to reduce noise and ensure stable operation.
• The OUT pin is open-collector, so an external pull-up resistor is required to interface with other components.
• Avoid exceeding the maximum voltage and current ratings to prevent damage to the IC.
• For precise timing, use high-quality resistors and capacitors with low tolerance values.

The CY6Y-1P4 can be used with an Arduino UNO to create a simple delay circuit. Below is an example code snippet:

// Example: Using CY6Y-1P4 with Arduino UNO
// This code triggers the CY6Y-1P4 timer and reads its output.

const int triggerPin = 2;  // Arduino pin connected to CY6Y-1P4 TRIG pin
const int outputPin = 3;   // Arduino pin connected to CY6Y-1P4 OUT pin

void setup() {
  pinMode(triggerPin, OUTPUT);  // Set trigger pin as output
  pinMode(outputPin, INPUT);    // Set output pin as input
  digitalWrite(triggerPin, HIGH); // Initialize trigger pin to HIGH
  Serial.begin(9600);           // Start serial communication
}

void loop() {
  // Trigger the CY6Y-1P4 timer
  digitalWrite(triggerPin, LOW);  // Send a LOW signal to start the timer
  delay(10);                      // Wait for 10ms
  digitalWrite(triggerPin, HIGH); // Set trigger pin back to HIGH

  // Read the output from the CY6Y-1P4
  int timerOutput = digitalRead(outputPin);
  Serial.print("Timer Output: ");
  Serial.println(timerOutput);

  delay(1000); // Wait for 1 second before triggering again
}

• Connect the TRIG pin of the CY6Y-1P4 to the triggerPin on the Arduino.
• Connect the OUT pin of the CY6Y-1P4 to the outputPin on the Arduino.
• Ensure proper grounding between the Arduino and the CY6Y-1P4 circuit.

1. The timer does not start when triggered.

   • Ensure the TRIG pin is pulled low momentarily to start the timer.
   • Check the connections and verify that the power supply voltage is within the specified range.

2. Incorrect timing interval.

   • Verify the values of the external resistor and capacitor used for timing.
   • Ensure the components are connected correctly to the DISCHARGE and THRESHOLD pins.

3. No output signal on the OUT pin.

   • Check if the OUT pin has a pull-up resistor connected.
   • Verify that the RESET pin is not held low, as this will disable the timer.

4. The IC overheats during operation.

   • Ensure the load connected to the OUT pin does not exceed the maximum current rating (50mA).
   • Check for short circuits or incorrect wiring.

Q: Can the CY6Y-1P4 generate PWM signals?
A: No, the CY6Y-1P4 is designed for fixed timing intervals and cannot generate variable duty cycle PWM signals. For PWM applications, consider using a dedicated PWM controller IC.

Q: What happens if the RESET pin is left floating?
A: The RESET pin should be connected to VCC through a pull-up resistor if not used. Leaving it floating may cause erratic behavior.

Q: Can I use the CY6Y-1P4 for timing intervals longer than 10 minutes?
A: Yes, by using higher resistance and capacitance values, longer timing intervals can be achieved. However, ensure the components are within practical limits to avoid instability.

Q: Is the CY6Y-1P4 suitable for battery-powered applications?
A: Yes, the low current consumption of the CY6Y-1P4 makes it suitable for battery-powered circuits. Use a low-power design to maximize battery life.