SN74LV123APW

Product Overview

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

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Operating Temperature Range: -40°C to +85°C
• Trigger Schmitt Inputs: TTL-Compatible
• Output Drive Capability: 10 LSTTL Loads
• Propagation Delay Time: 15 ns
• Power Dissipation: 25 mW
• Input Current: ±1 µA
• Output Current: ±8 mA

Detailed Pin Configuration

The SN74LV123APW has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Active LOW clear input
2. A (Trigger) - Positive edge-triggered input
3. B (Trigger) - Negative edge-triggered input
4. RCext (External Resistor/Capacitor) - External resistor/capacitor connection
5. RCext (External Resistor/Capacitor) - External resistor/capacitor connection
6. GND (Ground) - Ground reference
7. Q (Output) - Monostable output
8. Q (Complementary Output) - Complementary output
9. VCC (Positive Power Supply) - Positive power supply voltage
10. Q (Complementary Output) - Complementary output
11. Q (Output) - Monostable output
12. GND (Ground) - Ground reference
13. RCext (External Resistor/Capacitor) - External resistor/capacitor connection
14. RCext (External Resistor/Capacitor) - External resistor/capacitor connection
15. B (Trigger) - Negative edge-triggered input
16. A (Trigger) - Positive edge-triggered input

Functional Features

The SN74LV123APW is a dual retriggerable monostable multivibrator that can be used to generate precise timing pulses. It features TTL-compatible trigger Schmitt inputs, allowing easy interfacing with other digital circuits. The device has a low-voltage operation range of 2 V to 5.5 V, making it suitable for various low-power applications. With its reliable performance and fast propagation delay time of 15 ns, it provides accurate timing control.

Advantages and Disadvantages

Advantages: - Low-voltage operation range allows for compatibility with a wide range of systems - Dual retriggerable design provides flexibility in generating timing pulses - TTL-compatible trigger inputs simplify integration with other digital circuits - Fast propagation delay time ensures precise timing control

Disadvantages: - Limited output drive capability may restrict usage in high-load applications - Requires external resistors and capacitors for proper operation

Working Principles

The SN74LV123APW operates based on the principles of a monostable multivibrator. When triggered by a positive or negative edge at the A or B inputs, the device generates a pulse with a duration determined by the external resistor and capacitor connected to the RCext pins. The pulse width can be retriggered by subsequent triggers before the pulse ends, allowing for extended timing control.

Detailed Application Field Plans

The SN74LV123APW finds applications in various fields where precise timing control is required. Some potential application areas include:

1. Timing circuits in microcontrollers and digital systems
2. Pulse-width modulation (PWM) generation for motor control
3. Frequency division and clock synchronization in communication systems
4. Delay generation for signal processing and data transmission
5. Timing control in industrial automation and robotics

Detailed and Complete Alternative Models

1. SN74LV123A: Similar to SN74LV123APW, but available in a different package (SOIC)
2. CD74HC123E: High-speed CMOS version with similar functionality
3. MC14538B: Dual precision monostable multivibrator with wider supply voltage range

These alternative models offer similar features and can be considered as substitutes based on specific requirements.

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