Overview
The MC14538BDG, produced by onsemi, is a dual, retriggerable, and resettable monostable multivibrator. This IC is designed to generate accurate output pulses over a wide range of widths, determined by external timing components. It can be triggered from either the positive or negative edge of an input pulse, making it versatile for various applications. The device operates within a voltage range of 3.0 Vdc to 18 Vdc and is capable of driving low-power TTL loads. It is also pin-for-pin compatible with other similar devices like the MC14528B and CD4528B, and it is Pb-free and RoHS compliant.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage Range | -0.5 to +18.0 | V |
| Input or Output Voltage Range | -0.5 to VDD + 0.5 | V |
| Input or Output Current (DC or Transient) per Pin | ±10 | mA |
| Power Dissipation, per Package | 500 | mW |
| Operating Temperature Range | -55 to +125 | °C |
| Pulse Width Range | 10 μs to 10 s | s |
| External Timing Resistance (RX) | No limit, but susceptible to noise for RX > 1 MΩ | kΩ |
| External Timing Capacitance (CX) | No limit, but use discharge protection diode for CX > 15 μF | F |
Key Features
- Unlimited rise and fall time allowed on the A trigger input
- Latched trigger inputs and separate latched reset inputs
- Triggerable from positive (A input) or negative-going edge (B input)
- Capable of driving two low-power TTL loads or one low-power Schottky TTL load
- Pin-for-pin compatible with MC14528B and CD4528B
- NLV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable
- Pb-free and RoHS compliant
Applications
The MC14538BDG is suitable for a variety of applications, including:
- Pulse generation and shaping in digital circuits
- Timing and delay circuits
- Automotive systems requiring AEC-Q100 qualification
- Industrial control systems where precise timing is necessary
- Communication systems needing reliable pulse generation
Q & A
- What is the operating voltage range of the MC14538BDG?
The MC14538BDG operates within a voltage range of 3.0 Vdc to 18 Vdc.
- Can the MC14538BDG be triggered from both positive and negative edges of an input pulse?
Yes, the MC14538BDG can be triggered from either the positive or negative edge of an input pulse.
- What is the pulse width range of the MC14538BDG?
The pulse width range of the MC14538BDG is from 10 μs to 10 s.
- Is the MC14538BDG compatible with other similar devices?
Yes, it is pin-for-pin compatible with the MC14528B and CD4528B.
- What are the environmental operating conditions for the MC14538BDG?
The operating temperature range is -55°C to +125°C.
- How does the reset function work on the MC14538BDG?
The MC14538BDG can be reset during the generation of the output pulse by an input pulse on the Reset pin, which sets the reset latch and fast charges the capacitor to VDD.
- What precautions should be taken during power-down to avoid damage to the MC14538BDG?
During power-down, the capacitor voltage should discharge slowly to avoid current surges. An external clamping diode can be used to limit this current.
- Is the MC14538BDG suitable for automotive applications?
Yes, it is AEC-Q100 qualified and PPAP capable, making it suitable for automotive and other applications requiring unique site and control change requirements.
- What is the maximum power dissipation for the MC14538BDG?
The maximum power dissipation for the MC14538BDG is 500 mW per package.
- Is the MC14538BDG Pb-free and RoHS compliant?
Yes, the MC14538BDG is Pb-free and RoHS compliant.
