SN74LS123DR Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Logic multivibrators are electronic circuits with two states, commonly used to generate square wave signals. Even though their original use was to switch between a high and a low state, modern circuitry has evolved since then, which allows for various novel uses. One of the most popular alternatives is the SN74LS123DR, developed by Texas Instruments.

The SN74LS123DR is a dual retriggerable monostable multivibrator, which consists of two independent one-shots. It has two delay times, one variable and one fixed, that can be set with external capacitors and resistors, meaning a wide array of applications can be addressed with the device. Since it is retriggerable, it can be set off repeatedly by a single impulse. It also offers high accuracy and a low power consumption.

The most obvious application of the SN74LS123DR is to generate signals of well-defined duration, such as pulse trains and time delays. Since it has a range of adjustable delays, it is used in many scopes, ranging from specific task automation and industrial control, to medical equipment, printing, measurement and test devices.

The working principle of the SN74LS123DR resides in its structure. The device consists of two trigger circuits and one output stage, known as the monostable circuit. The two trigger circuits are each composed of an inverter and an NAND gate. If the voltage at the trigger input of the monostable circuit is a high, the output will then become low, and vice versa. If the voltage at the retrigger input goes low, the output stays low until the voltage at the retrigger input goes back to high.

The device’s capability to change its output state can be tuned using external components. When the trigger input is high, the monostable circuit is triggered and the output state will switch. Depending on the external capacitor C1, the output will remain high for the duration of the time delay, which can be calculated with the RC time constant. To reset the time delay, the reset input needs to be high.

The SN74LS123DR is a great tool when it comes to generating delays, and its simplicity makes it a great choice for many applications. Its accurate timing makes it ideal for accuracy sensitive tasks such as medical equipment, and its low power consumption makes it perfect for battery-powered devices. With its wide array of applications and adjustable delays, the SN74LS123DR is a great choice for many projects.

The specific data is subject to PDF, and the above content is for reference