MC74HC4538ADG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator
• Characteristics: High-speed CMOS logic, dual retriggerable monostable multivibrator
• Package: SOIC-16
• Essence: The MC74HC4538ADG is a high-speed CMOS logic IC that functions as a dual retriggerable monostable multivibrator. It is commonly used in electronic circuits for timing and pulse generation.
• Packaging/Quantity: The MC74HC4538ADG is typically sold in reels or tubes containing 250 units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Channels: 2
• Triggering Options: Positive-edge, negative-edge, or both
• Output Pulse Width Range: 0.1μs to 1000s
• Propagation Delay: 15ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC74HC4538ADG has a total of 16 pins arranged as follows:

__ __ A1 | 1 16 | VCC B1 | 2 15 | B2 A2 | 3 14 | Rext B2 | 4 13 | Cext GND | 5 12 | Q2 Q1 | 6 11 | Q2 CLR | 7 10 | TR D1 | 8 9 | D2 ¯¯ ¯¯

Functional Features

• Dual retriggerable monostable multivibrator
• Can be triggered by positive-edge, negative-edge, or both transitions
• Adjustable output pulse width using external resistors and capacitors
• Wide operating voltage range (2V to 6V)
• High-speed CMOS logic for fast operation
• Low power consumption

Advantages and Disadvantages

Advantages: - Dual-channel design allows for versatile timing applications - Retriggerable feature enables extended pulse generation - Wide supply voltage range enhances compatibility with different systems - High-speed CMOS logic ensures fast and accurate timing operations

Disadvantages: - Limited output pulse width range compared to some other multivibrators - Requires external components (resistors and capacitors) for precise timing control - Not suitable for high-frequency applications due to propagation delay

Working Principles

The MC74HC4538ADG operates based on the principles of a retriggerable monostable multivibrator. When triggered, it generates an output pulse whose width is determined by external resistors and capacitors connected to the Rext and Cext pins. The output pulse can be retriggered before it times out, extending the pulse duration.

Detailed Application Field Plans

The MC74HC4538ADG finds applications in various electronic circuits that require precise timing and pulse generation. Some common application fields include:

1. Timing circuits in microcontrollers and digital systems
2. Delay circuits in communication systems
3. Pulse-width modulation (PWM) generators
4. Frequency division circuits
5. Precision timing in industrial automation systems

Alternative Models

Here are some alternative models that offer similar functionality to the MC74HC4538ADG:

1. CD4538BCN - Dual precision monostable multivibrator
2. HEF4538BP - Dual retriggerable precision monostable multivibrator
3. SN74HC4538N - Dual retriggerable monostable multivibrator

These alternative models can be considered based on specific requirements and availability.

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