SN54LS123J

Overview

The SN54LS123J is a military-grade, retriggerable monostable multivibrator manufactured by Texas Instruments. It operates within an extended temperature range of -55°C to 125°C and utilizes a 16-pin Ceramic Dual In-Line Package (CDIP). The device generates a single output pulse of a specific duration when triggered by external signals, with the pulse width determined by an external resistor and capacitor network.

Feature Summary

• Retriggerable operation allows for extension of the output pulse duration upon receipt of additional trigger events during the active state.

Applications

• Military and defense electronic systems requiring radiation-hardened or high-reliability components
• Space-based applications utilizing qualified ceramic packaging
• Industrial control circuits operating in extreme environmental conditions

Procurement Notes

Verify that the component matches the exact SN54LS123J designation to ensure compatibility with military specifications. Confirm the CDIP package type and extended temperature rating are required for the target application. Check for authorized distribution channels to prevent counterfeit parts. Ensure compliance with relevant military standards such as QML certification if specified in the procurement requirements.

Selection Notes

Select this component when military-grade reliability and wide temperature operation are mandatory. The SN54LS123J is suitable for designs requiring robust performance in harsh environments where standard commercial parts would fail. Consider the ceramic package for enhanced mechanical strength and hermetic sealing compared to plastic alternatives.

Part Context

This part belongs to the SN54LS123 family of retriggerable monostable multivibrators. It shares functional characteristics with other variants like the SN74LS123 but differs in qualification level and operating temperature range. The SN54 series is specifically designed for military and aerospace applications, offering higher reliability than the SN74 commercial grade.

Replacement Considerations

Direct substitutes include other SN54LS123 variants with different packages, such as SNJ54LS123W (CFP) or SNJ54LS123FK (LCCC), provided pinout compatibility is verified. Cross-family replacements like SN54123 may require voltage level adjustments.