MC74AC161MG

Counter Dividers Overview

The MC74AC161MG is a high-speed synchronous modulo-16 binary counter manufactured by onsemi. It features four D-type edge-triggered flip-flops and supports parallel data loading via P0-P3 inputs. The device operates with a supply voltage range of 2.0 V to 6.0 V for the AC series and includes asynchronous Master Reset functionality. It utilizes a 16-lead EIAJ package (CASE 966) designed for surface-mount applications.

Counter Dividers Feature Summary

• Synchronous counting and presettable operation allows precise state control without ripple delay effects.
• Asynchronous Master Reset input overrides all other functions to force outputs LOW immediately.
• Terminal Count output facilitates versatile expansion for forming synchronous multistage counters.

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multistage counter systems
• Digital timing and sequencing circuits

Counter Dividers Procurement Notes

Verify that the specific MG suffix corresponds to the EIAJ-16 surface mount package configuration. Confirm RoHS compliance status as manufacturing specifications may vary by production batch. Ensure the design accommodates the asynchronous reset behavior which differs from synchronous alternatives in the same family.

Counter Dividers Selection Notes

Select this component when synchronous modulo-16 counting with immediate asynchronous reset is required. The AC logic family provides wide voltage flexibility compared to ACT variants. Verify that the 16-lead EIAJ footprint matches the target PCB layout constraints before finalizing the bill of materials.

Counter Dividers Part Context

This part belongs to the MC74AC161/ACT161 and MC74AC163/ACT163 family of synchronous binary counters. While the datasheet covers multiple suffixes, the MG designation specifically identifies the EIAJ-16 surface mount package variant within the broader 74AC logic product line.

Counter Dividers Replacement Considerations

CD74AC161E Texas Instruments

Counter Dividers FAQ

How does the reset mechanism function?

The MC74AC161 features an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW immediately, independent of the clock signal.

What is the maximum operating speed?

The typical count rate reaches 125 MHz, allowing for high-speed synchronous expansion in digital designs.