NE555p 555 Timer

The NE555P is a popular 555 timer IC in a DIP-8 package, widely used in timing, pulse generation, and oscillator applications. It provides precision timing from microseconds to hours and can be configured in monostable (one-shot) or astable (oscillator) modes.

Key Specifications for NE555P

General Specifications

1. Type: Precision timer IC
2. Package: DIP-8 (Dual Inline Package, 8 pins)
3. Modes of Operation: Monostable, Astable, and Bistable
4. Timing Range: Microseconds to hours (dependent on external RC components)

Electrical Characteristics

1. Supply Voltage (V_CC): 4.5 V to 16 V (typical operation at 5 V or 12 V)
2. Output Current: Capable of sourcing or sinking up to 200 mA
3. Output Voltage: Approximately V_CC - 1.7 V at high state and close to 0 V at low state
4. Operating Temperature Range: 0°C to 70°C for standard NE555P variant
5. Timing Accuracy: Precision timing with a typical variation of ±2%

Performance Characteristics

1. Maximum Frequency: Up to 100 kHz in astable mode
2. Low Power Consumption: <10 mA in idle states, varies with load and timing configuration
3. Propagation Delay: Fast response with microsecond-level timing accuracy

Pin Configuration (DIP-8)

1. Pin 1 (GND): Ground
2. Pin 2 (Trigger): Input to start timing cycle in monostable mode; typically connected to an external capacitor
3. Pin 3 (Output): Output pin that provides the timed pulse
4. Pin 4 (Reset): Active-low reset to stop timing; usually connected to V_CC if not used
5. Pin 5 (Control Voltage): Used to adjust threshold; often bypassed with a 0.01 µF capacitor to ground for stability
6. Pin 6 (Threshold): Compares voltage for timing cycle completion
7. Pin 7 (Discharge): Connected to the timing capacitor in astable and monostable modes
8. Pin 8 (V_CC): Power supply voltage

Typical Applications

1. Oscillators: Used in clocks, blinkers, and pulse generators
2. Timers: Provides time delays in circuits (e.g., in appliances, automation)
3. Pulse Width Modulation (PWM): Adjustable PWM output for motor control, LED dimming
4. Frequency Divider and Waveform Generation: Creates square waves and custom timing intervals

The NE555P in DIP-8 form is highly valued for its versatility, ease of use, and reliability, making it a staple in electronics for timing and waveform generation applications.