Overview
The NCV1455BDR2G is a highly stable monolithic timing circuit produced by onsemi. It is designed to operate in both astable and monostable modes, making it versatile for various timing and oscillation applications. This component is a direct replacement for the NE555 timers and is known for its high current output, temperature stability, and adjustable duty cycle. The NCV1455BDR2G is available in a Pb-free SOIC-8 package, making it suitable for automotive and other applications requiring site and change control.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Voltage | VCC | - | - | 18 | Vdc |
| Discharge Current (Pin 7) | I7 | - | - | 200 | mA |
| Operating Temperature Range | TA | -40 | - | 125 | °C |
| Maximum Operating Die Junction Temperature | TJ | - | - | 150 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
| Operating Supply Voltage Range | VCC | 4.5 | - | 16 | V |
| Supply Current (VCC = 5.0 V, RL = ∞) | ICC | - | - | 6.0 | mA |
| Threshold Voltage/Supply Voltage | Vth/VCC | - | 2/3 | - | - |
| Trigger Voltage (VCC = 15 V) | VT | - | 1.67 | - | V |
| Reset Voltage | VR | 0.4 | 0.7 | 1.0 | V |
| Output Voltage Low (ISink = 10 mA, VCC = 15 V) | VOL | - | - | 0.1 | V |
| Output Voltage High (ISource = 200 mA, VCC = 15 V) | VOH | - | - | 12.75 | V |
Key Features
- Direct replacement for NE555 timers
- Timing from microseconds through hours
- Operates in both astable and monostable modes
- Adjustable duty cycle
- High current output can source or sink up to 200 mA
- Output can drive TTL circuits
- Temperature stability of 0.005% per °C
- Normally ON or Normally OFF output
- Pb-free packages available
Applications
- Linear Voltage Ramp: Can be used to generate a linear ramp voltage by replacing the resistor with a constant current source.
- Missing Pulse Detector: Can produce an output when an input pulse fails to occur within the delay of the timer.
- Pulse Width Modulation: The charge time of the capacitor can be varied by changing the control voltage at Pin 5 in monostable mode.
- Astable Oscillator: The timer can be connected to retrigger itself, causing the capacitor voltage to oscillate between 1/3 VCC and 2/3 VCC.
Q & A
- What is the operating temperature range of the NCV1455BDR2G?
The operating temperature range is from -40°C to +125°C.
- What is the maximum discharge current of the NCV1455BDR2G?
The maximum discharge current is 200 mA.
- What is the typical supply current of the NCV1455BDR2G at VCC = 5.0 V?
The typical supply current is 3.0 mA.
- Can the NCV1455BDR2G drive TTL circuits?
- What is the temperature stability of the NCV1455BDR2G?
The temperature stability is 0.005% per °C.
- What are the package options for the NCV1455BDR2G?
The component is available in a Pb-free SOIC-8 package.
- How is the time delay calculated in monostable mode?
The time delay is given by the equation t = 1.1 RA C, where RA is the external resistor and C is the external capacitor.
- Can the NCV1455BDR2G be used as a missing pulse detector?
- What is the maximum operating die junction temperature of the NCV1455BDR2G?
The maximum operating die junction temperature is 150°C.
- Is the NCV1455BDR2G suitable for automotive applications?
