54193/BFA

Overview

The 54193/BFA is a synchronous 4-bit up/down binary counter manufactured by Rochester Electronics. It operates within the military temperature range of -55°C to 125°C and features independent clock inputs for counting up and down operations. The device includes asynchronous clear, parallel load, and ripple carry outputs. Constructed using CMOS technology, it is housed in a CDIP-14 package suitable for high-reliability applications.

Feature Summary

• Synchronous 4-bit binary counting with separate up and down clock inputs
• Asynchronous master reset and parallel data loading capabilities
• Military-grade reliability characterized for extreme temperature environments
• CMOS construction ensuring low power consumption and high noise immunity

Applications

• Military aerospace timing systems
• High-reliability industrial control counters
• Spacecraft telemetry data processing
• Defense communication equipment synchronization

Procurement Notes

Verify component authenticity through official manufacturer documentation or authorized distributors. Confirm that the part meets specific military qualification standards such as MIL-PRF-38535 if required for your application. Ensure proper handling procedures are followed due to the ceramic package type. Review all electrical specifications against your system requirements before integration.

Selection Notes

Select this component when a synchronous 4-bit counter with independent up/down control is required for harsh environments. Consider its military temperature rating and CMOS compatibility with standard logic families. Evaluate pinout compatibility with existing PCB layouts designed for similar legacy counter ICs. Verify voltage levels match your system's supply constraints.

Part Context

Rochester Electronics specializes in sustaining obsolete semiconductor products, particularly those used in defense and aerospace sectors. The 54193/BFA represents their effort to maintain availability of critical logic components originally produced by other manufacturers. This part ensures continuity for long-life programs where original sources are no longer active.

Replacement Considerations

Direct substitutes include the SN54193 from Texas Instruments or equivalent parts from other qualified manufacturers. Ensure functional equivalence regarding pinout, voltage levels, and timing characteristics. Verify that any replacement also meets the necessary military environmental qualifications.