MC74ACT161DG

Counter Dividers Overview

The MC74ACT161DG is a high-speed synchronous modulo-16 binary counter from the 74ACT series, manufactured by onsemi. It features an asynchronous Master Reset input that overrides all other inputs and forces outputs LOW. The device supports synchronous presettable loading for programmable dividers and includes two Count Enable inputs plus a Terminal Count output for versatile multistage counter configurations. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes D-type edge-triggered flip-flops with TTL-compatible inputs.

Counter Dividers Feature Summary

• Synchronous counting and parallel loading capabilities
• Asynchronous Master Reset function overriding all other inputs
• TTL compatible inputs for direct interfacing
• High-speed synchronous expansion via Terminal Count output

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multistage counters
• Digital timing circuits
• Binary sequence generation

Counter Dividers Procurement Notes

Verify the specific suffix 'DG' corresponds to the SOIC-16 package and lead-free status as defined in the ordering information section of the datasheet. Confirm that the asynchronous reset functionality aligns with system requirements, distinguishing it from the synchronous reset variant (MC74ACT163). Ensure operating conditions remain within the specified 4.5 V to 5.5 V supply voltage range.

Counter Dividers Selection Notes

Select this component when an asynchronous reset is required for immediate output clearing, unlike the synchronous reset alternative. The ACT series provides TTL-compatible input thresholds suitable for legacy logic interfacing while maintaining high-speed performance. Consider the SOIC-16 package dimensions and thermal characteristics if board space or heat dissipation are critical constraints in the design.

Counter Dividers Part Context

This part belongs to the MC74AC/ACT161/163 family of synchronous binary counters. The 'ACT' designation indicates CMOS technology with TTL-compatible input levels. It is distinct from the AC series due to its specific input voltage thresholds and from the 163 variant due to its asynchronous reset mechanism rather than synchronous reset.

Counter Dividers Replacement Considerations

CD74ACT161M from Texas Instruments is a confirmed substitute offering similar functional specifications and pinout compatibility.