SN74LS123NSR

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: TTL Logic, Dual Retriggerable Monostable Multivibrator
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: Reliable timing control for digital circuits
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Output Voltage: 2.7V (min)
• Low-Level Output Voltage: 0.5V (max)
• Propagation Delay Time: 15ns (typical)
• Trigger Pulse Width Range: 30ns to 100ms
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

1. CLR (Clear)
2. A (Trigger Input)
3. B (Retriggerable Trigger Input)
4. GND (Ground)
5. RC (Timing Resistor/Capacitor)
6. Q (Output)
7. VCC (Positive Power Supply)
8. Q (Complementary Output)
9. Q (Complementary Output)
10. Q (Complementary Output)
11. Q (Complementary Output)
12. Q (Complementary Output)
13. Q (Complementary Output)
14. Q (Complementary Output)
15. Q (Complementary Output)
16. VCC (Positive Power Supply)

Functional Features

• Dual retriggerable monostable multivibrator with TTL logic.
• Provides precise timing control for digital circuits.
• Can be triggered by either a positive or negative edge.
• Retriggerable feature allows extending the output pulse width.
• Offers flexibility in designing various timing applications.

Advantages and Disadvantages

Advantages: - Reliable and accurate timing control. - Retriggerable feature enhances flexibility. - TTL logic compatibility ensures easy integration.

Disadvantages: - Limited trigger pulse width range. - Requires external timing resistor/capacitor for operation.

Working Principles

The SN74LS123NSR is a dual retriggerable monostable multivibrator that generates precise output pulses based on the input triggers. It operates using TTL logic, making it compatible with various digital circuits. The device can be triggered by either a positive or negative edge, and the output pulse width can be extended by applying additional trigger pulses during the timing period.

To operate the SN74LS123NSR, an external timing resistor and capacitor are connected to the RC pin. The values of these components determine the duration of the output pulse. When a trigger signal is applied to the A or B input, the internal circuitry initiates a timing cycle. The output Q goes high for the duration determined by the RC time constant.

Detailed Application Field Plans

The SN74LS123NSR finds applications in various fields where precise timing control is required. Some of the common application areas include:

1. Digital Communication Systems: Used for synchronization and timing control in data transmission.
2. Industrial Automation: Provides accurate timing signals for controlling processes and operations.
3. Test and Measurement Equipment: Enables precise timing measurements and signal generation.
4. Robotics: Used for timing critical actions and coordination of robotic systems.
5. Automotive Electronics: Timing control for engine management systems, lighting controls, etc.

Detailed and Complete Alternative Models

1. CD74HC123E: Dual Retriggerable Monostable Multivibrator, CMOS Logic, 16-pin DIP package.
2. MC14538BDR2G: Dual Precision Retriggerable/Resettable Monostable Multivibrator, TTL Logic, 16-pin SOIC package.
3. HEF4538BP: Dual Precision Monostable Multivibrator, CMOS Logic, 16-pin DIP package.

These alternative models offer similar functionality and can be used as substitutes for the SN74LS123NSR in various applications.

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