MC74HC390AD

Counter Dividers Overview

The MC74HC390AD is a high-performance silicon-gate CMOS integrated circuit containing two independent 4-bit decade counters. Each counter comprises separate divide-by-two and divide-by-five sections with distinct clock inputs, enabling cascading for various division ratios up to ÷100. The device operates within a supply voltage range of 2 V to 6 V and supports a maximum clock frequency of 50 MHz at 6 V. It features asynchronous reset inputs for each counter and outputs directly interfacing with CMOS, NMOS, and TTL loads.

Counter Dividers Feature Summary

• Contains two independent 4-bit counters with separate divide-by-two and divide-by-five sections
• Outputs directly interface to CMOS, NMOS, and TTL loads
• Asynchronous reset inputs provided for each individual counter section

Counter Dividers Applications

• BCD count sequence generation
• Bi-quinary (2-5) count sequence implementation
• Cascaded decade divider circuits

Counter Dividers Procurement Notes

Verify the specific package suffix 'D' corresponds to the SOIC-16 configuration required for your design. Confirm that the component status aligns with current manufacturing availability, as older revisions may be discontinued. Ensure input pins are tied to appropriate logic levels when unused to prevent undefined states during operation.

Counter Dividers Selection Notes

Select this component when dual independent decade counting functionality is required within a single package. The HC series offers compatibility with standard CMOS outputs and low input current characteristics. Verify that the operating temperature range of -55°C to +125°C meets environmental requirements for the intended application scenario.

Counter Dividers Part Context

This part belongs to the MC74HC390A family of high-speed CMOS logic devices manufactured by onsemi. It is functionally pin-compatible with the LS390 variant while offering improved performance characteristics typical of silicon-gate CMOS technology. The device is designed for general-purpose digital counting applications requiring reliable decade division capabilities.

Counter Dividers Replacement Considerations

Direct substitutes include MC74HC390ADR2G from onsemi. Alternative sources offer compatible parts such as 74HC390D,653 from Nexperia USA Inc. and CD74HC390M96 from Texas Instruments.