SN74LS123DR

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SN74LS123DR

+BOM

IC MULTIVIBRATOR 28NS 16SOIC

  • ManufacturerTexas Instruments

  • Mfr. Part #SN74LS123DR

  • Package SOIC-16

  • In Stock6585

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Specifications

Attribute Value
Package Tape & Reel (TR),Cut Tape (CT)
Series 74LS
ProductStatus Active
LogicType Monostable
IndependentCircuits 2
SchmittTriggerInput No
PropagationDelay 28 ns
Current-OutputHighLow 400µA, 8mA
Voltage-Supply 4.75 V ~ 5.25 V
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width)

Overview

Description

The SN74LS123DR is a monolithic device that functions as a dual retriggerable monostable multivibrator with DC capability. It's part of the 74LS series, which includes TTL logic integrated circuits. This specific IC is known for generating precise time delays or pulse widths, which can be set via external timing components like resistors and capacitors. Each multivibrator in the device can be triggered by either the rising or falling edge of an input signal, making it versatile for various applications.
The SN74LS123DR features Schottky-clamped transistors, ensuring fast switching speeds and low power consumption. It provides TTL-compatible outputs, and its retriggerable characteristics mean that the output pulse duration can be extended by additional trigger pulses. This IC is particularly useful in applications such as pulse generation, time delay circuits, and signal conditioning, where precise timing control is required. Its compact SOIC-16 package makes it suitable for space-constrained designs. Overall, the SN74LS123DR is valued for its reliability, ease of use, and adaptability in digital logic applications.

Equivalent

The SN74LS123DR is a dual retriggerable monostable multivibrator. Equivalent products include the SN74HC123 and SN74HCT123 series from Texas Instruments, 74LS123 from various manufacturers, and CD74HCT123 from Texas Instruments. These alternatives generally offer similar functionality and pin configurations but may have differences in supply voltage or speed characteristics, so it’s important to verify compatibility with your specific application requirements.

Features

The SN74LS123DR is a monostable multivibrator integrated circuit manufactured by Texas Instruments. Key features include:
1. Dual Retriggerable Monostable Multivibrators: The IC contains two circuits that can be individually triggered.

2. Wide Range of Output Pulse Widths: The pulse width can be adjusted from a few nanoseconds to several seconds through external resistors and capacitors.
3. Retriggerable and Extendable Output: The output pulse can be retriggered by new input pulses, extending the output duration.
4. TTL-Compatible Inputs: The device is compatible with TTL logic levels, ensuring easy integration into digital systems.
5. Schmitt-Trigger Action: Designed for clean output transitions even with slow or noisy input signals.
6. Supply Voltage: Typically operates with a +5V power supply.
7. Temperature Range: Functions efficiently within a standard commercial temperature range.
8. Surface-Mount Package: Comes in a small-outline package (SOP), suitable for compact designs.
These features make the SN74LS123DR suitable for applications requiring precise timing control, delay circuits, or pulse generation.

Pinout

The SN74LS123DR is a dual monostable multivibrator IC with a retriggerable and resettable capability. It typically comes in a 16-pin SOIC (Small Outline Integrated Circuit) package. Here is a brief overview of its pin functions:
1. VCC (Pin 16): Power supply voltage.
2. GND (Pin 8): Ground.
3. A1, A2 (Pins 1, 9): Inputs for triggering the first and second monostable multivibrator sections, respectively.
4. B1, B2 (Pins 2, 10): Another set of inputs for triggering the respective sections.
5. CLR1, CLR2 (Pins 3, 11): Clear inputs for the respective sections; active low.
6. Q1, Q2 (Pins 6, 12): Outputs for the respective monostable multivibrator sections.
7. Q1', Q2' (Pins 7, 13): Complementary outputs for the respective sections.
8. RC1, RC2 (Pins 15, 5): External resistor-capacitor connections for timing components.
9. CEXT1, CEXT2 (Pins 14, 4): External capacitor connections for timing.
This IC is used in applications where precise pulse generation or delay is required.

Manufacturer

The SN74LS123DR is manufactured by Texas Instruments (TI), a major American technology company. TI is one of the world’s largest semiconductor companies, known for designing and manufacturing a wide range of semiconductor devices, including analog and embedded processing chips. The SN74LS123DR is a monostable multivibrator from their TTL logic family. Texas Instruments serves various industries, including automotive, consumer electronics, industrial, and communications, by providing essential components and solutions for electronic systems.

Application

The SN74LS123DR is a dual retriggerable monostable multivibrator used in various applications where precise timing is needed. Key application areas include:
1. Pulse Generation: Creating specific pulse widths for digital circuits.
2. Timing Delays: Implementing precise timing delays in electronic systems.
3. Oscillator Circuits: Serving as a fundamental component in oscillator designs.
4. Signal Conditioning: Cleaning up noisy signals by reshaping them into uniform pulses.
5. Frequency Division: Dividing frequency in digital clocks and timers.
6. Debouncing: Eliminating noise in switch and button operations.
7. Data Communication: Synchronizing data transmission in communication systems.
Its versatility makes it suitable for use in a wide range of digital electronics applications.

Package

The SN74LS123DR is a monostable multivibrator IC from Texas Instruments. The "DR" suffix indicates that it comes in a SOIC-16 (Small Outline Integrated Circuit) package with 16 pins, suitable for surface-mount technology (SMT) applications.

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