CD74HCT393M

Counter Dividers Overview

The CD74HCT393M is a dual 4-stage ripple-carry binary counter from the 74HCT series, manufactured by Harris Corporation. It operates on a single supply voltage ranging from 4.5V to 5.5V. The device features asynchronous negative-edge clocking and a common reset input for both counters. It utilizes CMOS technology with buffered inputs and is housed in a 14-pin SOIC surface-mount package. The maximum operating frequency is specified at 20MHz under nominal supply conditions.

Counter Dividers Feature Summary

• Dual independent 4-bit binary counters integrated into a single package
• Asynchronous negative-edge triggered clocking mechanism
• Common active-low reset input controlling all stages simultaneously
• Buffered inputs ensuring high noise immunity and static operation

Counter Dividers Applications

• Digital frequency division circuits
• Binary counting applications in digital systems
• Timing sequence generation
• Ripple-carry counter chains

Counter Dividers Procurement Notes

Verify the specific suffix 'M' indicates the SOIC package variant. Confirm RoHS compliance status as historical Harris data may vary. Ensure the supplier provides valid traceability documentation for this obsolete component. Check for alternative manufacturers if long-term availability is required.

Counter Dividers Selection Notes

Select this component when a dual 4-bit counter is required within a 5V logic system. The HCT series ensures compatibility with TTL logic levels while maintaining CMOS power efficiency. Consider the SOIC package constraints for PCB layout. Verify that asynchronous operation meets the timing requirements of the target application.

Counter Dividers Part Context

This part belongs to the Harris Semiconductor 74HCT logic family, designed for high-speed CMOS applications compatible with TTL inputs. The CD74HCT393M is an evolution of the standard 74393 binary counter, optimized for 5V operation. It represents Harris's contribution to general-purpose digital logic components before industry consolidation.

Counter Dividers Replacement Considerations

Equivalent parts include the SN74HCT393 or MC74HCT393. Verify pinout compatibility and electrical characteristics such as propagation delay and output drive current. Ensure the replacement supports the same 4.5V to 5.5V supply range and SOIC package dimensions.