SN74LS123N

Overview

The SN74LS123N is a dual retriggerable monostable multivibrator from the Texas Instruments 74LS logic family. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum static current of 12 mA. The device features a propagation delay of 56 ns at 5 V with a load capacitance of 15 pF, and a minimum pulse width of 40 ns. It utilizes a 16-pin DIP package and functions across an operating temperature range of 0°C to +70°C.

Feature Summary

• Contains two independent monostable multivibrators capable of generating precise timing pulses.
• Supports retriggering functionality for flexible pulse width adjustment during operation.
• Features complementary outputs for versatile signal interfacing requirements.

Applications

• Timing pulse generation in digital circuits
• Frequency division applications
• Pulse width modulation systems

Procurement Notes

Verify that the specific part number matches the required 74LS logic series and PDIP-16 package configuration. Confirm compatibility with standard TTL input levels and ensure the operating environment remains within the specified 0°C to +70°C temperature range. Check datasheet specifications for load capacitance limits to guarantee accurate pulse width performance.

Selection Notes

Select this component when dual independent monostable circuits are required within a single package. Ensure the design accommodates the 74LS series power consumption characteristics and 5 V nominal supply voltage. Verify that the 16-pin DIP form factor fits the target PCB layout constraints and assembly process requirements.

Part Context

This device belongs to the Texas Instruments 74LS (Low-power Schottky) logic family, known for improved speed over standard TTL while maintaining lower power dissipation. The SN74LS123 provides dual channels, offering a compact solution for timing applications compared to using separate single-channel devices.

Replacement Considerations

Compatible substitutes include SN74LS123D and SN74LS123DR. Verify pinout compatibility and electrical specifications before substitution.