Overview
The SE555DRG4, produced by Texas Instruments, is a precision timer IC designed for operation over a wide temperature range of -55°C to 125°C. This device is part of the xx555 family, known for its accuracy in producing time delays or oscillation. The SE555 is particularly suited for applications requiring reliable timing in harsh environmental conditions.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 4.5 | - | 18 | V |
| Operating Free-Air Temperature | -55 | - | 125 | °C |
| Output Current | - | - | ±200 | mA |
| THRES Voltage Level (VCC = 15 V) | 8.8 | 10 | 11.2 | V |
| TRIG Voltage Level (VCC = 15 V) | 1.45 | 1.67 | 1.9 | V |
| RESET Voltage Level | 1.1 | - | - | V |
| DISCH Switch On-State Voltage (VCC = 5 V, IO = 8 mA) | 0.15 | - | 0.4 | V |
Key Features
- Precision Timing: Capable of producing accurate time delays or oscillation from microseconds to hours.
- Astable or Monostable Operation: Can operate in both astable and monostable modes.
- Adjustable Duty Cycle: In astable mode, the frequency and duty cycle can be controlled independently using external resistors and a capacitor.
- High Current Output: The output circuit can sink or source current up to 200 mA.
- Wide Temperature Range: Operates from -55°C to 125°C, making it suitable for harsh environments.
- Reset Functionality: The reset input can override all other inputs and initiate a new timing cycle.
Applications
- Industrial Control Systems: Used in timing and sequencing applications in industrial environments.
- Aerospace and Defense: Suitable for applications requiring operation in extreme temperatures.
- Automotive Systems: Used in various automotive timing and control circuits.
- Medical Devices: Can be used in medical equipment that requires precise timing and reliability.
- Consumer Electronics: Found in various consumer electronic devices requiring timing functions.
Q & A
- What is the operating temperature range of the SE555DRG4?
The SE555DRG4 operates from -55°C to 125°C.
- What are the typical applications of the SE555DRG4?
It is used in industrial control systems, aerospace and defense, automotive systems, medical devices, and consumer electronics.
- Can the SE555DRG4 operate in both astable and monostable modes?
Yes, the SE555DRG4 can operate in both astable and monostable modes.
- What is the maximum output current of the SE555DRG4?
The maximum output current is ±200 mA.
- How is the timing interval controlled in the SE555DRG4?
In monostable mode, the timing interval is controlled by a single external resistor and capacitor network. In astable mode, the frequency and duty cycle are controlled by two external resistors and a single external capacitor.
- What is the purpose of the reset input in the SE555DRG4?
The reset input can override all other inputs and initiate a new timing cycle.
- What is the supply voltage range for the SE555DRG4?
The supply voltage range is from 4.5 V to 18 V.
- Can the SE555DRG4 be used in safety-critical applications?
It is important to consult the datasheet and ensure compliance with all relevant safety standards before using the SE555DRG4 in safety-critical applications.
- How does the SE555DRG4 handle thermal conditions?
The device has specified thermal impedance and maximum allowable power dissipation to ensure reliable operation within its operating temperature range.
- What are the typical characteristics of the output pulse in the SE555DRG4?
The output pulse characteristics include rise and fall times, and these can be found in the typical characteristics section of the datasheet.
