JM54AC191SFA-RH

Counter Dividers Overview

The JM54AC191SFA-RH is a space-level up/down counter with preset and ripple clock capabilities, belonging to the 54AC logic family. It is manufactured by National Semiconductor (now part of Texas Instruments) and designed for high-reliability applications. The device features a ceramic flatpack package with glass-sealed construction, ensuring durability in extreme environments. It operates within a temperature range of -55 °C to 125 °C and supports power supplies of 3.3 V or 5 V. The component includes six functional units with open-drain outputs and a propagation delay of approximately 15.5 ns at nominal supply.

Counter Dividers Feature Summary

• Space-level logic construction for high reliability
• Up/down counting with preset functionality
• Ripple clock operation mode
• Open-drain output configuration

Counter Dividers Applications

• Aerospace electronic systems
• Military-grade digital counters
• High-temperature industrial control circuits

Counter Dividers Procurement Notes

Verify that the ordering suffix matches the exact space-level specification required for your design. Confirm the manufacturer origin, as National Semiconductor assets are managed by Texas Instruments. Ensure the ceramic flatpack package type aligns with your PCB footprint requirements. Check for RoHS compliance status if applicable to your specific project constraints.

Counter Dividers Selection Notes

Select this component when radiation tolerance and wide temperature operation are critical. The 54AC series offers faster performance than standard 54LS logic while maintaining similar pinouts. Consider the open-drain outputs for wired-logic applications. Verify availability through authorized distributors due to the specialized nature of space-level components.

Counter Dividers Part Context

This part belongs to the 54AC series of logic integrated circuits, which are designed for demanding environments. The 'RH' suffix typically indicates a specific packaging or processing variant suitable for aerospace applications. It is functionally compatible with other 54AC devices but distinguished by its ruggedized construction and extended temperature range compared to commercial grade parts.

Counter Dividers Replacement Considerations

Direct substitutes include other space-level 54AC up/down counters from qualified manufacturers. Verify pin compatibility and electrical characteristics before substitution. Commercial equivalents like the 74AC191 lack the necessary environmental ratings for space applications.