74F193SJ

Overview

The Fairchild Semiconductor 74F193SJ is a synchronous, positive edge-triggered 4-bit bidirectional binary counter belonging to the F/FAST series. It operates in a synchronous mode with separate clock inputs for up and down counting directions. The device features parallel load capabilities and provides TCO (Terminal Count Output) signals for both up and down operations. It is housed in a 16-pin SOIC package with a maximum operating frequency of 90 MHz at nominal supply voltage.

Feature Summary

• Synchronous positive edge triggering with dedicated independent clocks for up-counting and down-counting operations
• Bidirectional 4-bit binary counting capability with parallel load input functionality
• Dedicated Terminal Count Outputs (TCO) for both up and down counting sequences

Applications

• Digital timing and sequencing circuits requiring precise count direction control
• Frequency division applications utilizing synchronous binary counting
• Event counting systems with bidirectional tracking requirements

Procurement Notes

Verify the specific manufacturer source, as Rochester Electronics also lists this part number. Confirm the package designation matches the required SOP/SOIC form factor. Ensure the component meets RoHS compliance standards if required by the assembly process. Check for any specific ordering suffixes that may indicate temperature range or packaging variations.

Selection Notes

Select this component when a high-speed synchronous counter with distinct up/down clock lines is necessary. The F/FAST series offers faster performance compared to standard TTL logic. Consider the 16-pin SOIC package constraints for PCB layout. Verify that the 90 MHz maximum frequency aligns with the system clock requirements.

Part Context

This component is part of the 74F series logic family, designed for high-speed digital applications. It serves as a fundamental building block for complex digital counters and timers. The 74F193SJ shares functional similarities with other 4-bit bidirectional counters but is distinguished by its specific F-series speed characteristics and synchronous operation mode.