Overview
The CD4541BCN Programmable Timer, manufactured by onsemi, is a versatile integrated circuit designed for various timing applications. It features a 16-stage binary counter, an integrated oscillator that can be configured with an external capacitor and two resistors, output control logic, and a special power-on reset circuit. This device is notable for its wide supply voltage range, high noise immunity, and low power consumption, making it suitable for a broad range of electronic systems.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (VDD) | 3.0 | - | 15.0 | V |
| Input Voltage (VIN) | 0 | - | VDD + 0.5 | V |
| Operating Temperature Range | -55 | - | 125 | °C |
| Oscillator Frequency Range | DC | - | 100 kHz | - |
| Output Rise Time (VDD = 5V) | 50 | - | 200 | ns |
| Output Fall Time (VDD = 5V) | 50 | - | 200 | ns |
| Propagation Delay (Clock to Q Output) | 1.8 | - | 4.0 | µs |
| Maximum Input Leakage | - | - | 1 µA | - |
| Power Dissipation (Dual-In-Line) | - | - | 700 mW | - |
| Power Dissipation (Small Outline) | - | - | 500 mW | - |
Key Features
- 16-stage binary counter with digitally controlled division ratios (2^8, 2^10, 2^13, and 2^16)
- Integrated oscillator with ±2% accuracy over temperature range and ±10% supply accuracy
- Oscillator frequency range from DC to 100 kHz
- Automatic power-on reset and external master reset
- Q/Q select output control for flexible output logic levels
- Wide supply voltage range: 3V to 15V
- High noise immunity: 0.45 VDD (typ.)
- Clock conditioning circuit for operation with slow clock rise and fall times
- Symmetrical output characteristics
- High output drive capable of driving one TTL load
Applications
The CD4541BCN is suitable for a variety of timing applications in electronic systems, including:
- Timing circuits for industrial automation systems
- Counters and timers for consumer electronics
- Pulse generators for medical devices
- Alarm systems and clock generators
Q & A
- Q: What is the maximum clock frequency supported by the CD4541BCN?
A: The CD4541BCN supports a maximum clock frequency of 100 kHz. - Q: Can the CD4541BCN be used in medical devices requiring pulse generators?
A: Yes, the CD4541BCN is suitable for medical devices requiring pulse generators with high accuracy and reliability. - Q: What is the operating temperature range of the CD4541BCN?
A: The operating temperature range is from -55°C to 125°C. - Q: How does the power-on reset circuit work in the CD4541BCN?
A: The power-on reset circuit initializes the counter and timing when power is turned on, without additional static power consumption, and functions across the full voltage range. - Q: Can the oscillator in the CD4541BCN be bypassed?
A: Yes, the oscillator can be bypassed if an external clock is available by applying the external clock to pin 3. - Q: What are the available division ratios for the CD4541BCN?
A: The available division ratios are 2^8, 2^10, 2^13, and 2^16. - Q: What is the maximum input leakage current for the CD4541BCN?
A: The maximum input leakage current is 1 µA at 15V over the full temperature range. - Q: How many TTL loads can the output of the CD4541BCN drive?
A: The output can drive at least one TTL load. - Q: What are the package options available for the CD4541BCN?
A: The CD4541BCN is available in 14-Lead Plastic Dual-In-Line Package (PDIP) and 14-Lead Small Outline Integrated Circuit (SOIC) packages. - Q: What is the power dissipation for the CD4541BCN in different packages?
A: The power dissipation is 700 mW for Dual-In-Line packages and 500 mW for Small Outline packages.
