CD74HC123NSRG4

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-Speed CMOS Logic, Dual Retriggerable Precision Monostable Multivibrator
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Reliable and versatile timing solution
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Propagation Delay Time: 14 ns
• Triggering Inputs: Active-High and Active-Low
• Output Drive Capability: 10 LSTTL Loads
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HC123NSRG4 has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Active-Low Clear Input
2. A (Trigger) - Active-High Trigger Input
3. B (Trigger) - Active-Low Trigger Input
4. RC (Resistor/Capacitor) - External Resistor/Capacitor Connection
5. VCC (Positive Supply Voltage)
6. Q (Output) - Monostable Output
7. GND (Ground)
8. Q (Output) - Complementary Output
9. Q (Output) - Complementary Output
10. Q (Output) - Complementary Output
11. Q (Output) - Complementary Output
12. Q (Output) - Complementary Output
13. Q (Output) - Complementary Output
14. Q (Output) - Complementary Output
15. Q (Output) - Complementary Output
16. Q (Output) - Complementary Output

Functional Features

• Dual retriggerable monostable multivibrator
• Precise output pulse width control
• Wide operating voltage range
• High noise immunity
• Low power consumption
• Schmitt-trigger inputs for improved noise rejection

Advantages and Disadvantages

Advantages: - Versatile timing solution suitable for various applications - Reliable performance with high noise immunity - Precise control over output pulse width - Low power consumption

Disadvantages: - Limited output drive capability (10 LSTTL loads) - Requires external resistor/capacitor for operation

Working Principles

The CD74HC123NSRG4 is a dual retriggerable precision monostable multivibrator. It generates a single output pulse of a precise duration when triggered by an input signal. The output pulse width can be controlled using an external resistor and capacitor connected to the RC pin.

Upon receiving a trigger signal, the multivibrator starts a timing cycle and produces an output pulse. If another trigger signal is received during the timing cycle, the timing cycle is extended, and a new output pulse is generated. This feature allows for retriggering and ensures that the output pulse width remains accurate even in the presence of additional trigger signals.

The device operates within a wide supply voltage range and provides high noise immunity due to its Schmitt-trigger inputs. It consumes low power, making it suitable for battery-powered applications.

Detailed Application Field Plans

The CD74HC123NSRG4 finds applications in various fields where precise timing control is required. Some of the detailed application field plans include:

1. Timing circuits in digital systems
2. Pulse-width modulation (PWM) generation
3. Frequency division and counting circuits
4. Delay circuits in communication systems
5. Precision timing in industrial automation
6. Control signal generation in robotics
7. Timing control in test and measurement equipment

Detailed and Complete Alternative Models

1. CD74HC123E - DIP (Dual In-Line Package) version of the CD74HC123NSRG4
2. CD74HCT123M - SOIC package variant with TTL-compatible inputs
3. SN74HC123N - DIP package variant from a different manufacturer
4. MC74HC123AN - DIP package variant with extended temperature range

These alternative models offer similar functionality and can be used as replacements for the CD74HC123NSRG4 in various applications.

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