54F192DM

Overview

The DM54F192 is a high-speed binary counter manufactured by National Semiconductor. It operates as an up/down counter with separate clock inputs for counting directions. The device utilizes Schottky TTL logic technology to achieve fast switching speeds. It features a synchronous preset capability, allowing data loading independent of the clock signal. The component is housed in a ceramic flatpack package with 16 pins, designed for military-grade temperature ranges.

Feature Summary

• Separate clock inputs for up and down counting operations
• Synchronous parallel load capability for preset data
• High-speed Schottky TTL performance characteristics

Applications

• Military aerospace timing systems
• High-speed digital counters
• Presettable frequency dividers

Procurement Notes

Verify the specific suffix 'DM' indicates the military grade ceramic flatpack variant. Confirm RoHS status as non-compliant due to lead content typical of this era. Ensure the supplier provides traceability documentation for the 883B or equivalent military specification if required for your application.

Selection Notes

Select this component when separate up and down clocks are required rather than a single direction control input. Compare against the 54LS192 if lower power consumption is prioritized over speed. Verify that the ceramic package thermal properties meet the environmental requirements of the target system.

Part Context

This part belongs to the 54F series of Schottky TTL logic devices. It is functionally similar to the 74F192 but rated for extended temperature ranges. The manufacturer National Semiconductor has been acquired by Texas Instruments, which continues to support legacy datasheets.

Replacement Considerations

The 54LS192 offers similar functionality with lower power but slower speed. The 54F193 is a binary version without decade reset. Cross-reference with current Texas Instruments equivalents for long-term supply assurance.