SN74HC193DR

Counter Dividers Overview

The SN74HC193DR is a 4-bit synchronous reversible up/down binary counter manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to 85°C. The device features fully synchronous counting, asynchronous clear, and parallel asynchronous load capabilities. It utilizes a 16-pin SOIC package and includes look-ahead circuitry for cascading without external logic.

Counter Dividers Feature Summary

• Synchronous operation eliminates output counting spikes associated with asynchronous counters
• Parallel asynchronous load allows modification of count length for modulo-N applications
• Asynchronous clear forces all outputs to low level independently of other inputs
• Look-ahead circuitry enables easy cascading via dedicated carry and borrow outputs

Counter Dividers Applications

• Modulo-N dividers using preset inputs
• Cascaded multi-stage counting systems
• Frequency division circuits
• Digital timing control sequences

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'DR' corresponds to the SOIC-16 package and tape-and-reel packaging configuration. Confirm that the component meets the required RoHS compliance standards and lead finish specifications (NIPDAU) for your assembly process. Ensure the operating temperature range aligns with your system's environmental requirements.

Counter Dividers Selection Notes

Select this component when synchronous counting behavior is required to prevent ripple-clock glitches. It is suitable for designs needing independent up and down clock inputs. Consider the HC logic family for compatibility with standard CMOS levels. Verify power dissipation limits and input transition times against your clock frequency requirements.

Counter Dividers Part Context

This part belongs to the SN74HC193 series of 4-bit synchronous reversible counters. It is distinct from the SN74HC191, which lacks separate up/down clocks. The 'DR' suffix indicates surface-mount packaging in a reel format. It serves as a catalog version of the military-grade SN54HC193.

Counter Dividers Replacement Considerations

• SN74HC193D

Counter Dividers FAQ

How does the SN74HC193 handle direction changes?

Direction is determined by pulsing either the UP or DOWN input while the other remains high. Synchronous operation ensures outputs change coincidentally.

What is the function of the BO and CO outputs?

The Borrow Output (BO) pulses low when counting down from zero. The Carry Output (CO) pulses low when counting up to maximum. These facilitate cascading.