Overview
The SE555DG4 is a precision timing circuit produced by Texas Instruments. It is part of the 555 timer family, known for its versatility and accuracy in generating time delays or oscillations. This component is particularly robust, operating over a wide temperature range of -55°C to 125°C, making it suitable for various industrial and military applications. The SE555DG4 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package, which is compact and suitable for surface mount technology.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | SOIC (D) | - |
| Number of Pins | 8 | - |
| Operating Temperature Range | -55 to 125 | °C |
| Supply Voltage Range | 4.5 to 18 | V |
| Output Current | ±200 | mA |
| Frequency (Max) | 100 kHz | - |
| Typical Supply Current | 4000 | μA |
| RoHS Compliance | Yes | - |
Key Features
- Timing from microseconds to hours
- Astable or monostable operation
- Adjustable duty cycle
- TTL-compatible output capable of sinking or sourcing up to 200mA
- Trigger and threshold levels adjustable via the control voltage pin (CONT)
- Reset input (RESET) to override all other inputs and initiate a new timing cycle
- Low-impedance discharge path between the discharge pin (DISCH) and ground pin (GND) when the output is low
Applications
The SE555DG4 is widely used in various applications requiring precise timing and oscillation. These include:
- Pulse generation and timing in electronic circuits
- Oscillator circuits for generating stable frequencies
- Time-delay circuits in monostable mode
- Industrial control systems requiring robust and reliable timing components
- Military and aerospace applications due to its extended temperature range and reliability
Q & A
- What is the operating temperature range of the SE555DG4?
The SE555DG4 operates over a temperature range of -55°C to 125°C.
- What is the package type of the SE555DG4?
The SE555DG4 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package.
- What is the maximum output current of the SE555DG4?
The output can sink or source up to 200mA.
- What is the supply voltage range for the SE555DG4?
The supply voltage range is from 4.5V to 18V.
- Is the SE555DG4 RoHS compliant?
Yes, the SE555DG4 is RoHS compliant.
- What are the primary modes of operation for the SE555DG4?
The SE555DG4 can operate in both astable and monostable modes.
- How is the duty cycle adjusted in the SE555DG4?
The duty cycle can be adjusted independently using two external resistors and a single external capacitor.
- What is the purpose of the control voltage pin (CONT) in the SE555DG4?
The control voltage pin (CONT) is used to adjust the trigger and threshold levels.
- What happens when the reset input (RESET) is low in the SE555DG4?
When the reset input (RESET) is low, the flip-flop is reset, and the output is low.
- What is the typical supply current of the SE555DG4?
The typical supply current is 4000 μA.
