Overview
The MC14541B, produced by onsemi, is a programmable timer that integrates several key components for timing and logic functions. It features a 16-stage binary counter, an integrated oscillator that can be configured with an external capacitor and two resistors, an automatic power-on reset circuit, and output control logic. This device is designed to provide flexible timing solutions, with the ability to initialize the counter upon power-up or through an external reset pulse. The oscillator frequency is determined by the external RC network, and the counter stages can be selected to provide various output frequencies.
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 Current (DC or Transient) | ±10 | mA |
| Output Current (DC or Transient) | ±45 | mA |
| Power Dissipation, per Package | 500 | mW |
| Ambient Temperature Range | −55 to +125 | °C |
| Storage Temperature Range | −65 to +150 | °C |
| Lead Temperature (8-Second Soldering) | 260 | °C |
| Output Rise and Fall Time (Typical at 25°C) | 100 ns (CL = 50 pF) | ns |
| Propagation Delay, Clock to Q (28 Output) | 3415 ns (CL = 50 pF) | ns |
Key Features
- 16-Stage Binary Counter: Provides a wide range of timing options with the ability to select different counter stages.
- Integrated Oscillator: Can be configured using an external capacitor and two resistors, allowing for flexible frequency settings.
- Automatic Power-On Reset Circuit: Initializes the counter upon power-up, ensuring consistent operation.
- Output Control Logic: Allows for the selection of output modes, including single cycle and recycle modes.
- External Reset Capability: Allows the counter to be reset while power is already on, using the Master Reset pin.
- Multiple Package Options: Available in SOIC-14, TSSOP-14, and SOEIAJ-14 packages, catering to different design requirements.
- Pb-Free and RoHS Compliant: Ensures environmental compliance and reliability.
Applications
The MC14541B programmable timer is versatile and can be used in a variety of applications, including:
- Timing and Synchronization: In systems requiring precise timing and synchronization, such as in industrial control systems, medical devices, and automotive electronics.
- Power Management: To manage power-up sequences and reset functions in complex electronic systems.
- Automotive Systems: Especially with the NLV prefix versions, which are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other demanding applications.
- Consumer Electronics: In devices that require reliable and adjustable timing functions, such as in audio equipment, home appliances, and other consumer electronics.
Q & A
- What is the primary function of the MC14541B?
The MC14541B is a programmable timer that integrates a 16-stage binary counter, an integrated oscillator, an automatic power-on reset circuit, and output control logic.
- How is the oscillator frequency determined in the MC14541B?
The oscillator frequency is determined by the external RC network, which includes a capacitor and two resistors.
- What is the purpose of the automatic power-on reset circuit?
The automatic power-on reset circuit initializes the counter upon power-up, ensuring consistent operation.
- Can the MC14541B be reset while power is already on?
- What are the available package options for the MC14541B?
The MC14541B is available in SOIC-14, TSSOP-14, and SOEIAJ-14 packages.
- Is the MC14541B Pb-Free and RoHS compliant?
- What is the DC supply voltage range for the MC14541B?
The DC supply voltage range is from −0.5 to +18.0 volts.
- What is the maximum output current per pin for the MC14541B?
The maximum output current per pin is ±45 mA.
- What is the ambient temperature range for the MC14541B?
The ambient temperature range is from −55 to +125°C.
- Can the MC14541B be used in automotive applications?
