HCF4541M013TR

Overview

Category: Integrated Circuit (IC)

Use: Timer/Counter

Characteristics: - Low power consumption - Wide operating voltage range - High noise immunity - Monostable or astable operation modes - Programmable time delay - Output pulse width control

Package: SO-14 (Small Outline 14-pin package)

Essence: The HCF4541M013TR is a timer/counter IC that provides precise timing and counting functions in various electronic applications.

Packaging/Quantity: Available in reels of 2500 units per reel.

Specifications

• Supply Voltage Range: 3V to 18V
• Operating Temperature Range: -40°C to +125°C
• Input Current: 1µA (max)
• Output Current: 10mA (max)
• Trigger Voltage: 0.7V (min), 2.5V (typ), 4.5V (max)
• Reset Voltage: 0.3V (min), 1.5V (typ), 2.5V (max)
• Timing Error: ±2% (max)

Pin Configuration

The HCF4541M013TR has a total of 14 pins, which are assigned specific functions as follows:

1. VDD: Positive supply voltage
2. GND: Ground reference
3. RESET: Active low reset input
4. TRIGGER: Trigger input for monostable operation
5. THRESHOLD: Threshold input for monostable operation
6. CONTROL: Control input for selecting the operating mode
7. DISCHARGE: Discharge pin for external capacitor
8. OUTPUT: Output pin for the timer/counter function
9. CEXT: External capacitor connection for timing purposes
10. REXT: External resistor connection for timing purposes
11. RB: Resistor connected to VDD for astable operation
12. RA: Resistor connected to GND for astable operation
13. CT: Timing capacitor for astable operation
14. VSS: Negative supply voltage

Functional Features

• Monostable Operation: The HCF4541M013TR can be configured as a monostable timer, where it generates a single pulse of programmable duration upon receiving a trigger signal.
• Astable Operation: It can also function as an astable oscillator, producing a continuous train of pulses with adjustable frequency and duty cycle.
• Wide Timing Range: The IC offers a wide range of timing options, allowing precise control over the output pulse width or frequency.
• Trigger and Reset Inputs: The trigger input initiates the timing cycle, while the reset input terminates it prematurely if required.
• Control Input: The control input selects between monostable and astable modes of operation.

Advantages and Disadvantages

Advantages: - Low power consumption makes it suitable for battery-powered applications. - High noise immunity ensures reliable operation in noisy environments. - Wide operating voltage range allows compatibility with various power sources. - Programmable time delay provides flexibility in timing requirements. - Small package size (SO-14) enables space-efficient circuit designs.

Disadvantages: - Limited output current may restrict its use in driving high-power loads. - Timing accuracy is subject to a maximum error of ±2%.

Working Principles

The HCF4541M013TR operates based on the principles of RC timing circuits. In monostable mode, when a trigger signal is applied, the internal timing capacitor charges through an external resistor. Once the voltage across the capacitor reaches the threshold level, the output switches state, generating a pulse whose width is determined by the RC time constant.

In astable mode, the timing capacitor charges and discharges between two voltage levels determined by external resistors. The charging and discharging periods create a continuous train of pulses with adjustable frequency and duty cycle.

Detailed Application Field Plans

The HCF4541M013TR finds applications in various fields, including:

1. Timing and Delay Circuits: Used to generate precise time delays in applications such as timers, alarms, and sequential control systems.
2. Frequency Generation: Employed as an astable oscillator to produce clock signals for digital circuits, frequency modulation, or tone generation.
3. Pulse Width Modulation (PWM): Utilized to generate variable-width pulses for controlling motor speed, LED brightness, or audio volume.
4. Debouncing: Helps eliminate contact bounce in mechanical switches by providing stable output signals.
5. Sequential Logic: Enables sequential operation in digital systems by generating timed events or triggering subsequent stages.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the HCF4541M013TR include:

1. CD4541B: CMOS Programmable Timer/Counter IC
2. NE555: Precision Timer IC
3. LM555