Overview
The MC14541B programmable timer, specifically the MC14541BDTR2G model from onsemi, is a versatile integrated circuit designed for timing and counting applications. It features a 16-stage binary counter, an integrated low-power RC oscillator, and output control logic. The device is initialized by a power-on reset and can also be reset externally. It operates over a wide supply voltage range and is available in Pb-free and RoHS-compliant packages, making it suitable for various industrial and automotive 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 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 |
| Oscillator Frequency Accuracy | ±2% over temperature range, ±20% supply, ±3% over processing at < 10 kHz |
Key Features
- Available Outputs: 28, 210, 213, or 216
- Increments on Positive Edge Clock Transitions
- Built-in Low Power RC Oscillator
- Oscillator May Be Bypassed if External Clock Is Available
- External Master Reset Totally Independent of Automatic Reset Operation
- Operates as 2n Frequency Divider or Single Transition Timer
- Q/Q Select Provides Output Logic Level Flexibility
- Reset (auto or master) Disables Oscillator During Resetting to Provide No Active Power Dissipation
- Clock Conditioning Circuit Permits Operation with Very Slow Clock Rise and Fall Times
- Automatic Reset Initializes All Counters On Power Up
- Pb-Free Packages are Available and RoHS Compliant
Applications
The MC14541B programmable timer is suitable for a wide range of applications, including industrial control systems, automotive systems, medical devices, and consumer electronics. Its versatility in timing and counting functions makes it a valuable component in systems requiring precise timing and reset capabilities.
Q & A
- What is the supply voltage range of the MC14541B?
The supply voltage range is from 3.0 Vdc to 18 Vdc, with automatic reset enabled or disabled based on the configuration of Pin 5. - Can the oscillator be bypassed?
Yes, the oscillator can be bypassed if an external clock is available by applying the external clock to Pin 3. - What types of reset are available?
The device features both automatic power-on reset and external master reset, which are totally independent of each other. - What is the purpose of the Q/Q Select feature?
The Q/Q Select feature provides output logic level flexibility, allowing the output to be initially low or high after reset. - Is the MC14541B suitable for automotive applications?
Yes, the NLV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other applications requiring unique site and control change requirements. - What is the maximum output current per pin?
The maximum output current per pin is ±45 mA. - What is the ambient temperature range for the device?
The ambient temperature range is from −55°C to +125°C. - Is the MC14541B Pb-free and RoHS compliant?
Yes, the MC14541B is available in Pb-free packages and is RoHS compliant. - How does the clock conditioning circuit benefit the device?
The clock conditioning circuit allows the device to operate with very slow clock rise and fall times. - What is the typical power dissipation during power-on with automatic reset enabled?
The typical power dissipation during power-on with automatic reset enabled is 50 μA at VDD = 10 Vdc.
