CD74HCT123MT

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-speed operation, Schmitt-trigger inputs, wide operating voltage range
• Package: 16-pin TSSOP (Thin Shrink Small Outline Package)
• Essence: Dual retriggerable monostable multivibrator
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 33 ns (typical)
• Trigger Pulse Width: 23 ns (typical)

Detailed Pin Configuration

1. CLR (Clear) - Active LOW clear input
2. A (Trigger) - Active HIGH trigger input
3. B (Retrigger) - Active HIGH retrigger input
4. Q (Output) - Monostable output
5. GND (Ground) - Ground reference
6. Q (Complementary Output) - Complementary output of the monostable
7. RCext (External Resistor/Capacitor) - External resistor/capacitor connection for timing control
8. VCC (Supply Voltage) - Positive supply voltage

Functional Features

• Dual retriggerable monostable multivibrator with independent trigger and retrigger inputs
• Schmitt-trigger inputs for improved noise immunity
• Wide operating voltage range allows compatibility with various logic families
• High-speed operation enables rapid signal processing

Advantages

• Flexible timing control through external resistor and capacitor
• Retriggerable functionality allows extending the output pulse width
• Schmitt-trigger inputs provide robustness against noise
• Wide operating voltage range enhances compatibility

Disadvantages

• Limited output current capability
• Requires external components for timing control
• Not suitable for applications requiring precise timing accuracy

Working Principles

The CD74HCT123MT is a dual retriggerable monostable multivibrator. It generates a pulse of a fixed duration in response to a trigger input. The output pulse width can be extended by applying retrigger pulses before the completion of the monostable period. The device utilizes Schmitt-trigger inputs, which ensure reliable triggering even in the presence of noise.

Detailed Application Field Plans

1. Timing Control: The CD74HCT123MT is commonly used in applications that require precise timing control, such as clock synchronization, delay generation, and pulse shaping.
2. Communication Systems: It finds application in communication systems for signal conditioning, synchronization, and data transmission.
3. Industrial Automation: The device is utilized in industrial automation for controlling timing sequences, motor control, and sensor interfacing.
4. Test and Measurement Equipment: It is employed in test and measurement equipment for generating precise timing signals and triggering events.

Detailed and Complete Alternative Models

1. 74HC123: Similar functionality but operates at a lower voltage range (2V to 5.5V).
2. CD4098: Dual monostable multivibrator with similar features but operates at a wider supply voltage range (3V to 18V).
3. MC14538B: Dual precision monostable multivibrator with comparable characteristics but operates at a lower frequency range.

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