NE555PSR

Overview

NE555PSR is a versatile integrated circuit (IC) that belongs to the NE555 series. It is widely used in various electronic applications due to its reliable performance and flexible functionality. This encyclopedia entry provides an in-depth understanding of NE555PSR, including its category, use, characteristics, package, essence, packaging/quantity, specifications, pin configuration, functional features, advantages and disadvantages, working principles, detailed application field plans, and alternative models.

Category

NE555PSR falls under the category of timer ICs (integrated circuits). Timer ICs are electronic devices that provide precise timing functions in various applications.

Use

NE555PSR is primarily used as a timer or oscillator in electronic circuits. It can generate accurate time delays, pulse-width modulation (PWM) signals, frequency generation, and other timing-related functions.

Characteristics

• High accuracy: NE555PSR offers excellent timing accuracy, making it suitable for applications requiring precise timing control.
• Wide operating voltage range: It operates within a wide voltage range, typically from 4.5V to 16V, allowing compatibility with different power supply systems.
• Low power consumption: NE555PSR consumes minimal power, making it energy-efficient and suitable for battery-powered applications.
• Stable operation: It exhibits stable performance even in harsh environmental conditions, ensuring reliable operation.
• Versatile functionality: NE555PSR can be configured in various modes, such as monostable, astable, and bistable, providing flexibility in designing electronic circuits.

Package

NE555PSR is available in a standard 8-pin small outline package (SOP), which facilitates easy integration into circuit boards.

Essence

The essence of NE555PSR lies in its ability to accurately measure and control time intervals, making it an essential component in numerous electronic devices and systems.

Packaging/Quantity

NE555PSR is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply voltage: 4.5V to 16V
• Operating temperature range: -40°C to +85°C
• Timing accuracy: ±2%
• Maximum output current: 200mA
• Trigger voltage: 1/3 Vcc
• Reset voltage: 0.7Vcc

Pin Configuration

The NE555PSR IC has eight pins, each serving a specific function:

1. GND (Ground): Connected to the ground reference of the circuit.
2. TRIG (Trigger): Determines the timing interval when triggered externally.
3. OUT (Output): Provides the output signal based on the configured mode.
4. RESET (Reset): Resets the timing cycle when triggered externally.
5. CTRL (Control Voltage): Allows external control of the timing characteristics.
6. THR (Threshold): Sets the upper threshold for the timing interval.
7. DIS (Discharge): Discharges the timing capacitor during the timing cycle.
8. VCC (Supply Voltage): Connected to the positive supply voltage.

Functional Features

• Monostable mode: In this mode, NE555PSR generates a single pulse of a specified duration upon triggering.
• Astable mode: NE555PSR operates as an oscillator, generating continuous square wave signals with adjustable frequency and duty cycle.
• Bistable mode: It can be used as a flip-flop, maintaining its state until triggered externally.
• Adjustable timing: NE555PSR allows precise adjustment of timing intervals using external resistors and capacitors.
• Output compatibility: The output signal can drive various loads, including LEDs, relays, and other electronic components.

Advantages and Disadvantages

Advantages

• Versatile functionality for different timing applications.
• High accuracy and stability.
• Low power consumption.
• Easy integration into electronic circuits.
• Cost-effective solution.

Disadvantages

• Limited timing range compared to some specialized timer ICs.
• Requires external components for precise timing control.

Working Principles

NE555PSR operates based on the charging and discharging of an external timing capacitor. The internal comparators monitor the voltage levels at the threshold and trigger pins, determining the timing intervals. By adjusting the values of external resistors and capacitors, the timing characteristics can be precisely controlled.

Detailed Application Field Plans

NE555PSR finds extensive applications in various fields, including:

1. Timing circuits: Used in applications requiring accurate time delays, such as timers, clocks, and sequential control systems.
2. Pulse-width modulation (PWM): NE555PSR generates PWM signals used in motor speed control, LED dimming, and audio amplifiers.
3. Frequency generation: It is employed in frequency synthesizers, tone generators, and frequency dividers.
4. Oscillators: NE555PSR serves as a stable oscillator in applications like beepers, alarms, and waveform generation.
5. Robotics