CD74HC123PWT

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-speed CMOS logic, dual retriggerable monostable multivibrator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HC123PWT is a high-speed CMOS integrated circuit that functions as a dual retriggerable monostable multivibrator. It is commonly used in electronic circuits for timing and pulse generation applications.
• Packaging/Quantity: The CD74HC123PWT is typically sold in reels or tubes, with a quantity of 250 or 3000 units per reel/tube.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC (High-Speed CMOS)
• Number of Channels: 2
• Propagation Delay: 13 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HC123PWT has a total of 16 pins, which are arranged as follows:

1. Pin 1: Input A1
2. Pin 2: Ground (GND)
3. Pin 3: Input B1
4. Pin 4: Output Q1
5. Pin 5: Reset (active low)
6. Pin 6: Trigger (active low)
7. Pin 7: Control Voltage (CV)
8. Pin 8: VCC (Positive Power Supply)
9. Pin 9: Output Q2
10. Pin 10: Input B2
11. Pin 11: Ground (GND)
12. Pin 12: Input A2
13. Pin 13: Output Q2
14. Pin 14: Reset (active low)
15. Pin 15: Trigger (active low)
16. Pin 16: Control Voltage (CV)

Functional Features

• Dual retriggerable monostable multivibrator
• Wide operating voltage range
• High-speed operation
• Low power consumption
• Schmitt-trigger inputs for noise immunity
• Output pulse width adjustable using external components
• Can be triggered by positive or negative edge transitions

Advantages and Disadvantages

Advantages: - Versatile timing and pulse generation capabilities - Wide operating voltage range allows for compatibility with various systems - High-speed operation enables precise timing control - Low power consumption for energy-efficient designs - Noise immunity due to Schmitt-trigger inputs

Disadvantages: - Limited number of channels (2) - External components required for adjusting output pulse width

Working Principles

The CD74HC123PWT operates as a dual retriggerable monostable multivibrator. It can be triggered by either positive or negative edge transitions on the trigger input. Upon triggering, the output Q1 or Q2 produces a pulse whose width is determined by external components connected to the control voltage (CV) pin. The output pulse width can be adjusted according to the application requirements.

Detailed Application Field Plans

The CD74HC123PWT 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. Pulse-width modulation (PWM) control circuits
3. Frequency division and counting circuits
4. Delay circuits in communication systems
5. Precision timing in scientific instruments

Detailed and Complete Alternative Models

1. CD74HC123E: DIP (Dual In-line Package) version of CD74HC123PWT
2. CD74HCT123PWT: High-Speed CMOS/TTL compatible version with similar functionality
3. CD74AC123PWT: Advanced CMOS version with improved speed and performance

These alternative models offer similar functionality to the CD74HC123PWT but may have different package types or additional features.

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