CD74HC390EE4

Counter Dividers Overview

The CD74HC390EE4 is a high-speed CMOS logic dual decade ripple counter manufactured by Texas Instruments. It contains two independent 4-bit decade counters, each divided into a divide-by-2 and a divide-by-5 section with separate clock inputs. The device operates on a supply voltage range of 2V to 6V and supports an operating temperature range from -55°C to +125°C. It utilizes a 16-pin PDIP package.

Counter Dividers Feature Summary

• Dual independent 4-bit decade counters with asynchronous clear functionality
• Flexible configuration for frequency division or counting applications
• High noise immunity and balanced propagation delay characteristics

Counter Dividers Applications

• BCD decade counting circuits
• Bi-quinary decade counting configurations
• Frequency division networks (divide-by-2, 4, 5, 10, 20, 25, 50, 100)

Counter Dividers Procurement Notes

Verify the component matches the specific CD74HC390EE4 designation, noting that the 'E4' suffix indicates lead-free packaging compliant with RoHS standards. Confirm the physical package type is the 16-pin PDIP variant. Ensure the supplier provides documentation confirming the active production status and material finish specifications as listed in the manufacturer's orderable addendum.

Counter Dividers Selection Notes

Select this component when a dual decade counter with wide voltage operation is required. The HC series offers significant power reduction compared to LSTTL logic while maintaining pin compatibility. Verify that the application requires falling-edge clocked inputs and asynchronous reset capabilities. Consider the thermal resistance and operating temperature limits if the environment exceeds standard commercial ranges.

Counter Dividers Part Context

This part belongs to the CD74HC390 family of high-speed CMOS logic devices. It is functionally equivalent to the CD74HC390 but includes the E4 suffix denoting environmental compliance. The device is designed to be pin-compatible with low-power Schottky TTL (LSTTL) logic families, facilitating direct replacement in existing designs.

Counter Dividers Replacement Considerations

CD74HC390E serves as the primary non-environmental variant within the same package.