SN74LV123APWRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: Low-voltage, dual retriggerable monostable multivibrator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Reliable timing solution for various electronic applications
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6 ns
• Trigger Pulse Width Range: 30 ns to 1000 ns
• Trigger Input Current: ±1 μA
• Output Drive Capability: ±8 mA

Detailed Pin Configuration

The SN74LV123APWRG4 IC has a total of 16 pins, which are assigned specific functions as follows:

1. CLR (Clear): Clear input pin used to reset the internal flip-flop.
2. A (Trigger): Trigger input pin that initiates the timing cycle.
3. B (Threshold): Threshold input pin that determines the duration of the timing cycle.
4. GND (Ground): Ground reference pin.
5. Q (Output): Output pin that provides the timing pulse.
6. VCC (Supply Voltage): Positive supply voltage pin.

Pins 7 to 14 are not used in this particular IC, while pins 15 and 16 are reserved for future use.

Functional Features

The SN74LV123APWRG4 is a versatile integrated circuit that serves as a dual retriggerable monostable multivibrator. It offers the following functional features:

• Retriggerable Operation: The IC can be retriggered during the timing cycle by applying a new trigger pulse, allowing for flexible timing control.
• Wide Trigger Pulse Width Range: The trigger pulse width can be adjusted from 30 ns to 1000 ns, providing a broad range of timing options.
• Stable Timing Characteristics: The IC exhibits low propagation delay time and precise timing accuracy, ensuring reliable performance in various applications.
• Low Power Consumption: With a supply voltage range of 1.65V to 5.5V, the IC operates efficiently while consuming minimal power.
• Compact Package: The TSSOP package offers a small footprint, making it suitable for space-constrained designs.

Advantages and Disadvantages

Advantages: - Retriggerable operation allows for flexible timing control. - Wide trigger pulse width range provides versatility in timing applications. - Stable timing characteristics ensure reliable performance. - Low power consumption contributes to energy efficiency. - Compact package enables space-saving designs.

Disadvantages: - Limited number of available pins restricts additional functionality. - Not suitable for high-speed applications due to relatively slow propagation delay time.

Working Principles

The SN74LV123APWRG4 operates based on the principles of a monostable multivibrator. When a trigger pulse is applied to the A pin, the internal flip-flop is set, initiating the timing cycle. The duration of the timing cycle is determined by the voltage level at the B pin. During this cycle, the Q output goes high, generating a timing pulse. If a new trigger pulse is received before the timing cycle ends, the internal flip-flop is reset, and the timing cycle restarts.

Detailed Application Field Plans

The SN74LV123APWRG4 finds application in various electronic systems where precise timing control is required. Some potential application fields include:

1. Timing Circuits: The IC can be used in timing circuits for controlling delays, pulse generation, and synchronization.
2. Communication Systems: It can be employed in communication systems for generating precise timing signals.
3. Industrial Automation: The IC can be utilized in industrial automation systems for controlling timing sequences and synchronization of processes.
4. Test and Measurement Equipment: It finds application in test and measurement equipment for generating accurate timing references.
5. Consumer Electronics: The IC can be integrated into consumer electronic devices that require timing control, such as timers and clocks.

Detailed and Complete Alternative Models

1. SN74LV123A: Similar to SN74LV123APWRG4 but available in a different package (SOIC).
2. CD74HC123E: High-speed alternative with similar functionality but operates at a higher voltage range.
3. MC14538B: Dual retriggerable monostable multivibrator with additional features like Schmitt-trigger inputs.

These alternative models offer similar functionality to the SN74LV123APWRG4 and can be considered based on specific design requirements.

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