SN74LS123DRE4

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: TTL Logic, Dual Retriggerable Precision Monostable Multivibrator
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The SN74LS123DRE4 is a dual retriggerable precision monostable multivibrator integrated circuit. It is designed to generate accurate time delays or pulses.
• Packaging/Quantity: Available in tape and reel packaging with 2500 units per reel.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 22 ns
• Trigger Pulse Width: 30 ns to 100 ns
• Output Pulse Width: 45 ns to 1000 ns
• Triggering from Leading or Trailing Edge
• Low Power Consumption

Detailed Pin Configuration

The SN74LS123DRE4 has a total of 16 pins. Here is the detailed pin configuration:

1. CLR (Clear) - Active LOW input for resetting the internal flip-flop
2. A (Trigger) - Active HIGH input for triggering the monostable multivibrator
3. B (Retrigger) - Active HIGH input for retriggering the monostable multivibrator
4. GND (Ground) - Ground reference voltage
5. Y (Output) - Output of the monostable multivibrator
6. VCC (Positive Supply Voltage) - Positive power supply voltage

7-14. NC (No Connection) - These pins are not connected internally and can be left unconnected.

1. B (Retrigger) - Active HIGH input for retriggering the monostable multivibrator
2. VCC (Positive Supply Voltage) - Positive power supply voltage

Functional Features

• Dual retriggerable precision monostable multivibrator
• Accurate time delay generation
• Triggering from leading or trailing edge
• Wide range of trigger pulse width and output pulse width
• Low power consumption
• TTL logic compatibility

Advantages and Disadvantages

Advantages: - Accurate and precise time delay generation - Retriggerable functionality allows for extended pulse generation - Wide range of trigger and output pulse widths - Low power consumption

Disadvantages: - Limited to TTL logic compatibility - Not suitable for high-speed applications

Working Principles

The SN74LS123DRE4 is based on the principles of a monostable multivibrator. It consists of two internal flip-flops triggered by external inputs. When a trigger pulse is applied, the output goes high for a specific duration determined by the external components. The monostable multivibrator can be retriggered during this period, extending the output pulse width.

Detailed Application Field Plans

The SN74LS123DRE4 finds applications in various fields, including:

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

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality:

1. CD4538BCN - Dual Precision Monostable Multivibrator
2. MC14538B - Dual Precision Monostable Multivibrator
3. NE555P - Precision Timer

These alternatives provide options for users with different requirements and preferences.

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