74HCT390N,652

Counter Dividers Overview

The 74HCT390N,652 is a dual decade ripple counter from the 74HCT logic family. It contains two independent 4-bit counters, each comprising a divide-by-2 section and a divide-by-5 section. The device operates on a supply voltage range of 4.5 V to 5.5 V. Inputs are TTL-compatible with clamp diodes for overvoltage interfacing. Each counter has an asynchronous master reset input (active HIGH) that overrides clocks to set outputs LOW. Counting occurs on the HIGH-to-LOW clock transition.

Counter Dividers Feature Summary

• Dual configuration supporting BCD decade or bi-quinary counting modes
• TTL-level inputs compatible with standard logic families
• Asynchronous master reset functionality for immediate clearing
• High noise immunity and robust latch-up protection

Counter Dividers Applications

• Frequency division circuits
• BCD decade counting applications
• Bi-quinary decade configurations
• Ripple counter designs

Counter Dividers Procurement Notes

Verify the specific package type against the ordering information table in the datasheet, as the 'N' suffix typically denotes a DIP package but official documentation lists SO16 and TSSOP16 variants. Confirm the manufacturer origin, noting that Nexperia acquired the NXP Standard Product business. Ensure the component meets the required temperature range specifications for the intended operating environment.

Counter Dividers Selection Notes

Select this component when TTL-compatible inputs are required for decade counting applications. It is suitable for designs needing frequency division ratios of 2, 4, 5, 10, 20, 25, 50, or 100 within a single package. Consider the HCT series for direct interfacing with TTL logic levels without additional level shifting components.

Counter Dividers Part Context

This component belongs to the 74HCT series, which provides CMOS performance with TTL-compatible inputs. The 74HC390/74HCT390 family is designed for general-purpose digital counting and frequency division tasks. The device integrates two separate counters to maximize functionality while minimizing board space.

Counter Dividers Replacement Considerations

Check for equivalent parts such as the 74HC390 variant if CMOS inputs are acceptable. Verify pin compatibility and electrical characteristics against other manufacturers' dual decade counters.