Overview
The NE555PSRE4, produced by Texas Instruments, is a highly versatile and widely used integrated circuit precision timer. It is capable of operating in both monostable and astable modes, allowing it to generate accurate time delays or oscillations. The device is highly flexible, with timing intervals that can range from microseconds to hours, making it suitable for a variety of applications. The NE555PSRE4 is available in several package types, including PDIP, SOP, and SOIC, to accommodate different design requirements.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 4.5 | 16 | V | |
| Operating Ambient Temperature (TA) | 0 | 70 | °C | |
| Threshold Voltage Level (VTH) | 2.7 | 3.3 | 4 | V |
| Trigger Voltage Level (VTRIG) | 1.45 | 1.67 | 1.9 | V |
| Reset Voltage Level (VRESET) | 0.4 | 0.5 | 1 | V |
| Output Current (IO) | ±200 | mA | ||
| Output Low Level Voltage (VOL) | 0.25 | V (at IOL = 10mA) | ||
| Output High Level Voltage (VOH) | 4.5 | V (at IOH = -10mA) |
Key Features
- Timing Range: From microseconds to hours.
- Operation Modes: Astable and monostable modes.
- Adjustable Duty Cycle: Frequency and duty cycle can be controlled independently using external resistors and a capacitor.
- TTL-Compatible Output: Can source or sink up to 200mA, compatible with TTL inputs.
- Control Voltage Terminal: Allows adjustment of threshold and trigger levels.
- Reset Input: Can override all other inputs to initiate a new timing cycle.
- Low Power Consumption: Efficient operation with a wide range of supply voltages.
- RoHS Compliant: Totally lead-free and fully RoHS compliant.
Applications
- Pulse Generation: Used in circuits requiring precise pulse generation.
- Sequential Timing: Suitable for sequential timing applications.
- Time Delay Generation: Ideal for generating time delays in various circuits.
- Pulse Width Modulation (PWM): Can be used to modulate the width of output pulses.
- Pulse Position Modulation: Used in applications requiring modulation of pulse positions.
- Linear Ramp Generator: Can be configured to generate linear ramps.
- Missing Pulse Detector: Used to detect missing or abnormally spaced pulses in pulse trains.
Q & A
- What are the primary operation modes of the NE555PSRE4?
The NE555PSRE4 operates in both astable and monostable modes.
- What is the range of supply voltage for the NE555PSRE4?
The supply voltage range is from 4.5V to 16V.
- How is the timing interval controlled in the NE555PSRE4?
In monostable mode, the timing interval is controlled by a single external resistor and capacitor network. In astable mode, it is controlled by two external resistors and a single external capacitor.
- What is the maximum output current of the NE555PSRE4?
The output can source or sink up to 200mA.
- Is the NE555PSRE4 compatible with TTL inputs?
- How can the duty cycle be adjusted in the NE555PSRE4?
The duty cycle can be adjusted independently using the external resistors and capacitor in astable mode.
- What is the purpose of the control voltage terminal in the NE555PSRE4?
The control voltage terminal allows adjustment of the threshold and trigger levels.
- What is the function of the reset input in the NE555PSRE4?
The reset input can override all other inputs to initiate a new timing cycle.
- Is the NE555PSRE4 RoHS compliant?
- What are some common applications of the NE555PSRE4?
