MC74HC390ADT

Counter Dividers Overview

The MC74HC390ADT is a dual 4-bit decade counter integrated circuit manufactured by onsemi. It operates within a supply voltage range of 2 V to 6 V and supports a counting rate of 50 MHz. The device features negative edge-triggered flip-flops with asynchronous reset functionality. It is housed in a 16-TSSOP surface-mount package and is rated for an operating temperature range of -55°C to +125°C. This component belongs to the 74HC logic series.

Counter Dividers Feature Summary

• Dual independent 4-bit decade counters integrated into a single package
• Negative edge-triggered clocking mechanism for precise timing control
• Asynchronous reset capability for immediate state initialization
• Wide operating voltage range supporting low-power applications

Counter Dividers Applications

• Digital frequency division circuits
• Binary-coded decimal (BCD) counting systems
• Time-base generation in digital clocks
• Event counting in industrial automation

Counter Dividers Procurement Notes

Verify the specific suffix ADT confirms the 16-TSSOP package variant, as other suffixes indicate different physical footprints. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Check for obsolescence notices or lifecycle changes directly from onsemi to ensure long-term availability for production planning.

Counter Dividers Selection Notes

Select this component when dual independent decade counting is required in a compact surface-mount form factor. Ensure the design accommodates the 2 V to 6 V supply range and 50 MHz maximum frequency. Verify that the asynchronous reset logic aligns with system timing requirements compared to synchronous alternatives.

Counter Dividers Part Context

This part is part of the standard 74HC family of high-speed CMOS logic devices. It provides compatible pinouts and electrical characteristics with other industry-standard 74HC counters, facilitating drop-in replacements in designs originally based on generic 74HC390 specifications from various manufacturers.

Counter Dividers Replacement Considerations

Direct substitutes include MC74HC390ADR2G from onsemi. Similar functional equivalents are available from Nexperia (74HC390D,653) and Texas Instruments (CD74HC390M96), though package differences may require PCB layout adjustments.