MM74HC123AN

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-Speed CMOS Logic, Dual Retriggerable Precision Monostable Multivibrator
• Package: DIP (Dual In-line Package)
• Essence: The MM74HC123AN is a versatile integrated circuit that can be used as a multivibrator or a monostable multivibrator. It is part of the HC family of high-speed CMOS logic chips.
• Packaging/Quantity: The MM74HC123AN is typically sold in packs of 25 units.

Specifications

• Supply Voltage: 2V to 6V
• Propagation Delay: 13 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Input Compatibility: TTL, CMOS
• Output Compatibility: CMOS
• Triggering Options: Positive or Negative Edge Triggered
• Retriggerable: Yes

Pin Configuration

The MM74HC123AN has a total of 16 pins arranged in a dual in-line package (DIP). Here is the detailed pin configuration:

1. Clear (CLR)
2. Retrigger (RET)
3. Output (Q)
4. Ground (GND)
5. Control Voltage (CV)
6. Threshold (TH)
7. Trigger (TR)
8. Reset (RESET)
9. VCC (Positive Supply Voltage)

Functional Features

• Multivibrator Mode: In this mode, the MM74HC123AN functions as a free-running multivibrator. The output oscillates between high and low states at a frequency determined by external components.
• Monostable Multivibrator Mode: In this mode, the MM74HC123AN operates as a precision monostable multivibrator. It generates a single pulse of a duration determined by external components upon receiving a trigger signal.
• Retriggerable: The MM74HC123AN can be retriggered during the output pulse, allowing for extended pulse durations.
• Wide Supply Voltage Range: The chip can operate within a supply voltage range of 2V to 6V, making it compatible with various power sources.
• Fast Propagation Delay: With a typical propagation delay of 13 ns, the MM74HC123AN ensures quick response times in applications.

Advantages and Disadvantages

Advantages: - Versatile functionality as both a multivibrator and a monostable multivibrator - Retriggerable feature allows for extended pulse durations - Wide supply voltage range enables compatibility with different power sources - Fast propagation delay ensures quick response times

Disadvantages: - Limited number of pins may restrict the complexity of circuits that can be built using this chip - Requires external components for precise timing control

Working Principles

In multivibrator mode, the MM74HC123AN uses external resistors and capacitors to create an oscillating output waveform. The frequency of oscillation is determined by the values of these external components.

In monostable multivibrator mode, the chip generates a single pulse of a duration determined by external resistors and capacitors when triggered. The pulse width can be extended by retriggering the chip during the output pulse.

Detailed Application Field Plans

The MM74HC123AN finds applications in various fields, including:

1. Timing Circuits: The chip is commonly used in timing circuits where precise control over pulse durations or oscillation frequencies is required.
2. Communication Systems: It can be utilized in communication systems for generating accurate timing signals.
3. Industrial Automation: The MM74HC123AN can be employed in industrial automation systems for controlling timing sequences.
4. Instrumentation: It finds use in instrumentation applications where precise timing is crucial, such as signal generation and synchronization.

Detailed and Complete Alternative Models

• CD74HC123E
• SN74HC123N
• MC74HC123AN
• 74HC123D

These alternative models offer similar functionality to the MM74HC123AN and can be used as replacements depending on availability and specific requirements.

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