SN74LS123N

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SN74LS123N

IC MULTIVIBRATOR 28NS 16DIP

  • Manufacturer
  • Mfr. Part #SN74LS123N
  • Package PDIP (N)-16
  • Datasheet
  • In Stock5520

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Specifications

Package Bulk,Tube
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 Through Hole
Package/Case 16-DIP (0.300, 7.62mm)

Overview

Description

The SN74LS123N is a dual monostable multivibrator integrated circuit from Texas Instruments, part of the 74LS series. It is designed to generate precise timing pulses in response to input triggers. The device features two independent monostable outputs which can be triggered by either positive or negative edges, making it versatile for various applications.
Key features include a wide supply voltage range (4.75V to 5.25V), fast response times (typically 25 ns), and the ability to be retriggered while the timing cycle is active. The output can drive TTL (Transistor-Transistor Logic) loads directly, allowing easy integration into digital circuits.
The SN74LS123N is commonly used in timing applications, pulse-width modulation, and as a timer in sequential circuits. Its ability to produce stable timing signals makes it suitable for applications in automotive, industrial, and consumer electronics. Overall, the SN74LS123N offers robust performance and reliability in timing and control functions.

Features

The SN74LS123N is a dual retriggerable monostable multivibrator with the following key features:
1. Dual Functionality: It can operate as a monostable multivibrator, generating a single output pulse in response to a trigger input.
2. Retriggerable: Capable of extending the output pulse duration if a new trigger pulse is received during the output pulse.
3. Adjustable Pulse Width: The pulse width can be varied from a few microseconds to several minutes by selecting appropriate external resistor and capacitor values.
4. TTL Compatible: It is compatible with TTL logic levels, making it suitable for interfacing with other TTL devices.
5. Low Power Consumption: The device features low power dissipation, ideal for power-sensitive applications.
6. Temperature Range: Operates over a wide temperature range, ensuring reliability in various environments.
7. Pin Configuration: Standard 14-pin DIP package, facilitating easy integration into circuits.
These features make the SN74LS123N suitable for timing applications, delay generation, and pulse width modulation in digital circuits.

Package

The SN74LS123N is available in a dual-in-line package (DIP), specifically a 14-pin DIP configuration. This package type supports easy mounting on printed circuit boards.

Pinout

The SN74LS123N is a dual retriggerable monostable multivibrator (one-shot) integrated circuit with a total of 16 pins.
Pin Count and Functions:
1. 1 (GND): Ground
2. 2 (A): Trigger input (active low)
3. 3 (Q): Output (high when triggered)
4. 4 (Q' or /Q): Inverted output
5. 5 (R): Reset input (active low)
6. 6 (Vcc): Supply voltage (typically +5V)
7. 7 (C): Charge input
8. 8 (C'): Charge output (used for timing)
9. 9 (D): Not connected
10. 10 (R'): Not connected
11. 11 (A): Trigger input (active low, for second one-shot)
12. 12 (Q): Output (high when triggered, for second one-shot)
13. 13 (Q' or /Q): Inverted output (for second one-shot)
14. 14 (R): Reset input (active low, for second one-shot)
15. 15 (D): Not connected
16. 16 (Vcc): Supply voltage (typically +5V)
The SN74LS123N is commonly used for timer applications, pulse generation, and delay generation in digital circuits.

Manufacturer

The SN74LS123N is manufactured by Texas Instruments (TI), a prominent technology company known for designing and manufacturing semiconductor devices and various electronic components. Founded in 1930, Texas Instruments is a major player in the field of analog and digital signal processing, microcontrollers, and embedded processors. The company serves a wide range of markets, including automotive, industrial, communications, and consumer electronics. TI is recognized for its innovation in integrated circuits and has a strong focus on research and development, contributing to advancements in electronics and technology globally.

Application

The SN74LS123N is a dual retriggerable monostable multivibrator used in various applications, including pulse width modulation, timing circuits, frequency dividers, and event counters. It's commonly employed in oscillators, signal conditioning, and delay generation in digital systems. Additionally, it can be utilized in automotive electronics, industrial automation, and communication systems for generating precise timing and control signals.

Equivalent

The SN74LS123N is a dual retriggerable monostable multivibrator. Equivalent products include:
1. 74HC123 - High-speed CMOS version.
2. 74HCT123 - TTL compatible version of 74HC123.
3. MC14538 - CMOS version from ON Semiconductor.
4. LM555 - General-purpose timer, although functionally different, used in similar applications.
Always check specific datasheets for pin compatibility and performance characteristics before substitution.

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