SN74LS123DRE4

Overview

The SN74LS123DRE4 is a dual retriggerable monostable multivibrator from the Texas Instruments 74LS logic series. It operates within a supply voltage range of 4.75 V to 5.25 V and features a maximum static current of 12 mA. The device provides a propagation delay of 28 ns and supports output currents of 8 mA (low) and -400 µA (high). Packaged in a 16-SOIC format, it functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Dual independent retriggerable monostable multivibrator circuits integrated into a single package
• Compatible with standard 74LS TTL logic families for direct interfacing
• Designed for surface-mount assembly using the 16-pin SOIC footprint

Applications

• Pulse width generation and timing control
• Debouncing mechanical switches
• Frequency division circuits

Procurement Notes

Verify the specific suffix 'E4' indicates RoHS compliance and manufacturing origin details as defined by Texas Instruments. Confirm that the component matches the 16-SOIC physical dimensions and pinout configuration required for the target PCB layout. Ensure the operating environment remains within the specified 0°C to +70°C thermal limits during deployment.

Selection Notes

Select this component when dual monostable functionality is required within the 74LS logic family constraints. It is suitable for designs needing retriggerable behavior without external complex circuitry. Consider the 16-SOIC package availability and surface-mount processing requirements compared to through-hole alternatives like the SN74LS123N.

Part Context

This part belongs to the SN54/74(LS)122/23/30 family of monostable multivibrators. It shares functional similarities with the SN74LS122 but offers two independent channels instead of one. The 'E4' suffix typically denotes environmental compliance and specific manufacturing traceability standards set by the original equipment manufacturer.

Replacement Considerations

SN74LS123DR is listed as a manufacturer-recommended alternative.