CD74HCT390EE4

Counter Dividers Overview

The CD74HCT390EE4 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 within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from -55°C to +125°C. It features asynchronous clear inputs for individual reset control and provides balanced propagation delays.

Counter Dividers Feature Summary

• Dual independent 4-bit decade counters with separate clock inputs
• Asynchronous controller reset inputs for clearing individual sections
• Direct LSTTL input logic compatibility
• Configurable frequency division ratios including divide-by-2, 4, 5, 10, 20, 25, 50, and 100

Counter Dividers Applications

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

Counter Dividers Procurement Notes

Verify the component matches the specific HCT logic family requirements, as HC and HCT variants differ in voltage tolerance and input thresholds. Confirm the PDIP-16 package type aligns with board layout constraints. Ensure the ordering suffix 'E4' corresponds to the intended lead finish and RoHS compliance status required for the assembly process.

Counter Dividers Selection Notes

Select this component when direct compatibility with LSTTL logic levels is necessary within a CMOS system. The HCT series ensures standard TTL input voltages are correctly interpreted without level shifting. Consider the wide industrial temperature range if the application environment exceeds standard commercial limits. Verify that the asynchronous clear functionality meets the system reset timing requirements.

Counter Dividers Part Context

This part belongs to the Texas Instruments 74HCT logic family, which bridges the gap between low-power Schottky TTL performance and CMOS power efficiency. The CD74HCT390EE4 specifically utilizes the E4 suffix to denote environmental compliance and lead finish specifications. It is pin-compatible with other devices in the 74HC and 74HCT series, facilitating design flexibility across different logic families.

Counter Dividers Replacement Considerations

CD74HCT390E serves as a direct functional equivalent within the same packaging and logic family.