MC74ACT161DR2

Counter Dividers Overview

The MC74ACT161DR2 is a high-speed synchronous modulo-16 binary counter manufactured by onsemi. It features a 4-bit up-counting architecture with a typical count rate of 125 MHz and operates within a supply voltage range of 4.5 V to 5.5 V. The device includes an asynchronous Master Reset input that overrides all other inputs and forces outputs LOW. Outputs provide 24 mA source/sink current, and the component utilizes TTL-compatible inputs for interface flexibility.

Counter Dividers Feature Summary

• Synchronous counting and loading operations ensure accurate state transitions.
• Asynchronous Master Reset input allows immediate output clearing regardless of clock signals.
• TTL-compatible inputs facilitate direct interfacing with standard logic circuits.

Counter Dividers Applications

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

Counter Dividers Procurement Notes

Verify the specific ordering suffix 'R2' corresponds to the SOIC-16 tape and reel packaging configuration. Confirm RoHS compliance status as applicable to the manufacturing date code. Ensure the procurement channel sources directly from authorized distributors to guarantee component authenticity and traceability.

Counter Dividers Selection Notes

Select this component when an asynchronous reset function is required for immediate system initialization. The ACT series provides TTL-compatible input thresholds suitable for mixed-voltage environments. Verify that the 125 MHz typical count rate meets the maximum operational frequency requirements of the target application design.

Counter Dividers Part Context

This part belongs to the MC74AC(T)161/163 family of synchronous presettable binary counters. It shares functional similarities with the MC74ACT163 but differs in its reset mechanism, utilizing an asynchronous Master Reset rather than a synchronous variant. Both variants support parallel data loading and terminal count generation for cascading applications.

Counter Dividers Replacement Considerations

MC74ACT163DG serves as a functional substitute if a synchronous reset mechanism is acceptable instead of the asynchronous Master Reset found in the MC74ACT161 series.