CD74HC123NSR

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-Speed CMOS Logic, Dual Retriggerable Precision Monostable Multivibrator
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: CD74HC123NSR is a versatile integrated circuit that can be used as a multivibrator or monostable multivibrator in various electronic applications.
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2V to 6V
• Propagation Delay: 14 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±5.2 mA
• Input Capacitance: 3.5 pF (typical)

Detailed Pin Configuration

1. CLR (Clear) - Active LOW input for resetting the internal flip-flop
2. D (Data) - Input for triggering the monostable multivibrator
3. GND (Ground) - Ground reference for the IC
4. Q (Output) - Output of the monostable multivibrator
5. VCC (Supply Voltage) - Positive supply voltage input
6. RCext (External Resistor/Capacitor) - External timing components for controlling the pulse width
7. RExt (External Resistor) - External resistor for controlling the pulse width
8. CExt (External Capacitor) - External capacitor for controlling the pulse width
9. Rext (External Resistor) - External resistor for controlling the pulse width
10. CE (Control Enable) - Active HIGH input for enabling/disabling the monostable operation
11. A (Output) - Output of the internal flip-flop
12. B (Output) - Complementary output of the internal flip-flop
13. C (Output) - Output of the internal flip-flop
14. D (Output) - Complementary output of the internal flip-flop
15. Rext (External Resistor) - External resistor for controlling the pulse width
16. VCC (Supply Voltage) - Positive supply voltage input

Functional Features

• Retriggerable operation allows for extending the output pulse width by triggering the monostable multivibrator before the previous pulse ends.
• Wide operating voltage range makes it suitable for various power supply configurations.
• High-speed CMOS logic ensures fast and reliable operation.
• Flexible timing control through external resistors and capacitors.
• Active LOW clear input for resetting the internal flip-flop.

Advantages

• Versatile functionality as both a multivibrator and monostable multivibrator.
• Precise timing control with external components.
• Compact 16-pin SOIC package for easy integration into electronic circuits.
• Wide operating temperature range enables usage in diverse environments.
• High-speed CMOS logic ensures efficient performance.

Disadvantages

• Limited output current capacity may restrict certain applications.
• Requires external timing components for precise pulse width control.
• Not suitable for high-voltage applications due to the limited supply voltage range.

Working Principles

CD74HC123NSR operates based on the principles of multivibrator and monostable multivibrator circuits. The internal flip-flop is triggered by the input signal, which then activates the monostable multivibrator. The output pulse width is determined by the external resistor and capacitor connected to the RCext pin. The retriggerable feature allows for extending the output pulse width by triggering the monostable multivibrator before the previous pulse ends.

Detailed Application Field Plans

CD74HC123NSR finds applications in various electronic systems, including:

1. Timing circuits
2. Pulse generation and shaping
3. Frequency division
4. Delay circuits
5. Sequential logic circuits
6. Control systems
7. Communication systems
8. Industrial automation

Detailed and Complete Alternative Models

1. CD74HC123E - 16-pin PDIP (Plastic Dual In-line Package) variant of CD74HC123NSR.
2. SN74HC123N - 16-pin DIP (Dual In-line Package) variant from Texas Instruments.
3. MC74HC123AN - 16-pin DIP variant from ON Semiconductor.

These alternative models offer similar functionality and can be used as substitutes for CD74HC123NSR in various applications.

Word count: 526 words