Overview
The MC14538BDR2, produced by onsemi, is a dual precision retriggerable/resettable monostable multivibrator. This integrated circuit is designed to generate accurate output pulses over a wide range of widths, determined by external timing components. It is highly versatile, allowing triggering from either the positive or negative edge of an input pulse. The device is pin-for-pin compatible with other models like the MC14528B and CD4528B, making it a reliable choice for various applications.
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 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 | |
| Output Rise Time (CL = 50 pF, TA = 25°C) | 100 ns (typical) | ns |
| Output Fall Time (CL = 50 pF, TA = 25°C) | 100 ns (typical) | ns |
| Propagation Delay Time A or B to Q or Q | 255 ns (typical) | ns |
Key Features
- Unlimited rise and fall time allowed on the A trigger input.
- Pulse width range from 10 μs to 10 s.
- 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.
- Pb-free and RoHS compliant.
- AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements.
Applications
The MC14538BDR2 is suitable for a variety of applications, including:
- Pulse generation and shaping in digital circuits.
- Timing and delay circuits in electronic systems.
- Automotive systems requiring precise timing and reliability.
- Industrial control systems where accurate pulse widths are necessary.
- Communication systems needing retriggerable monostable multivibrators.
Q & A
- What is the MC14538BDR2? The MC14538BDR2 is a dual precision retriggerable/resettable monostable multivibrator produced by onsemi.
- What is the pulse width range of the MC14538BDR2? The pulse width range is from 10 μs to 10 s.
- Can the MC14538BDR2 be triggered from both positive and negative edges? Yes, it can be triggered from either the positive (A input) or negative-going edge (B input).
- What is the operational voltage range of the MC14538BDR2? The DC supply voltage range is from 3.0 Vdc to 18 Vdc.
- Is the MC14538BDR2 compatible with other models? Yes, it is pin-for-pin compatible with models like the MC14528B and CD4528B.
- What are the key features of the MC14538BDR2? Key features include unlimited rise and fall time on the A trigger input, latched trigger and reset inputs, and the ability to drive low-power TTL loads.
- Is the MC14538BDR2 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.
- How does the reset function work on the MC14538BDR2? The reset function sets the reset latch and causes the capacitor to be fast charged to VDD, allowing the output pulse to be significantly shorter than the minimum pulse width specification.
- What precautions should be taken during power-down? Large capacitance values can cause problems; the discharge time of the VDD supply must not be faster than (VDD) x (C)/(10 mA) to avoid damage.
- Is the MC14538BDR2 Pb-free and RoHS compliant? Yes, it is Pb-free and RoHS compliant.
