M74HC4538B1R - English Editing Encyclopedia Entry

Product Overview

Category

The M74HC4538B1R belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in electronic circuits for precision timing and frequency control.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compact package size

Package

The M74HC4538B1R is available in a small outline integrated circuit (SOIC) package.

Essence

This IC is essential for applications that require accurate timing and synchronization.

Packaging/Quantity

The M74HC4538B1R is typically packaged in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 2V to 6V
• Operating Temperature Range: -40°C to +125°C
• Output Current: ±25mA
• Propagation Delay Time: 15ns (typical)
• Trigger Voltage Levels: VIL = 0.8V, VIH = 2V

Detailed Pin Configuration

The M74HC4538B1R has a total of 16 pins, which are assigned specific functions as follows:

1. Pin 1: Output Q1
2. Pin 2: Output Q2
3. Pin 3: Ground (GND)
4. Pin 4: Data Input A
5. Pin 5: Data Input B
6. Pin 6: Reset Input (RESET)
7. Pin 7: Control Input (CONTROL)
8. Pin 8: Clock Input (CLOCK)
9. Pin 9: Output Q3
10. Pin 10: Output Q4
11. Pin 11: Output Q5
12. Pin 12: Output Q6
13. Pin 13: Output Q7
14. Pin 14: VCC (Supply Voltage)
15. Pin 15: Data Input C
16. Pin 16: Data Input D

Functional Features

• The M74HC4538B1R is a dual retriggerable monostable multivibrator.
• It can be triggered by either a positive or negative edge on the control input.
• The output pulse width can be adjusted using external timing components.
• It provides precise timing control for various applications.

Advantages and Disadvantages

Advantages

• High-speed operation allows for accurate timing control.
• Low power consumption makes it suitable for battery-powered devices.
• Wide operating voltage range ensures compatibility with different systems.
• Compact package size saves board space in electronic designs.

Disadvantages

• Limited number of outputs may restrict certain complex applications.
• External timing components are required for precise pulse width adjustment.

Working Principles

The M74HC4538B1R operates based on the principles of retriggerable monostable multivibrators. When triggered, it generates a single output pulse with a duration determined by external timing components. The IC can be retriggered during the output pulse, extending its duration. The control input determines the trigger edge (positive or negative) that initiates the pulse generation.

Detailed Application Field Plans

The M74HC4538B1R finds extensive use in various electronic applications, including:

1. Precision timing circuits
2. Frequency generators
3. Pulse-width modulation (PWM) controllers
4. Delay circuits
5. Sequential logic circuits

Detailed and Complete Alternative Models

1. CD4538BCN - CMOS Dual Monostable Multivibrator
2. NE555P - Precision Timer IC
3. MC14538B - Dual Precision Retriggerable/Resettable Monostable Multivibrator

These alternative models offer similar functionality and can be used as substitutes for the M74HC4538B1R in different applications.

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