MC74ACT163NG

Counter Dividers Overview

The MC74ACT163NG is a high-speed synchronous modulo-16 binary counter manufactured by onsemi. It features a 16-pin DIP package and operates within a supply voltage range of 4.5 V to 5.5 V. The device includes four parallel data inputs, two count enable inputs (CEP and CET), and a terminal count output. It utilizes D-type edge-triggered flip-flops with a synchronous reset input that overrides counting and parallel loading on the rising clock edge. The logic series ensures TTL-compatible inputs.

Counter Dividers Feature Summary

• Synchronous presettable modulo-16 binary counting capability
• TTL compatible inputs for direct interfacing
• Outputs capable of sourcing and sinking 24 mA

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multistage counters
• Digital timing circuits

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the PDIP-16 package configuration as defined in the manufacturer's documentation. Confirm RoHS compliance status and Pb-free availability through official channels. Ensure the component meets the recommended operating conditions regarding supply voltage and ambient temperature ranges specified in the datasheet before integration.

Counter Dividers Selection Notes

Select this component when a synchronous reset mechanism is required rather than an asynchronous one. The ACT series provides TTL-compatible input thresholds suitable for mixed-voltage systems. Consider the 24 mA output drive capability for direct load driving applications without additional buffering stages.

Counter Dividers Part Context

This part belongs to the MC74AC161/74ACT161 and MC74AC163/74ACT163 family of high-speed synchronous binary counters. The AC163 variant specifically distinguishes itself from the AC161 by utilizing a synchronous reset input instead of an asynchronous master reset. Both variants share identical counting logic and expansion capabilities.

Counter Dividers Replacement Considerations

MC74ACT161D

Counter Dividers FAQ

How does the reset function differ between the MC74ACT163 and MC74ACT161?

The MC74ACT163 features a Synchronous Reset input that clears outputs on the rising clock edge, whereas the MC74ACT161 uses an Asynchronous Master Reset that forces outputs LOW immediately regardless of the clock state.

What is the purpose of the Terminal Count (TC) output?

The TC output goes HIGH when the counter reaches state 15 and CET is HIGH, facilitating the cascading of multiple counters to form synchronous multistage counters.