MC74ACT161M

Counter Dividers Overview

The MC74ACT161M is a high-speed synchronous modulo-16 binary counter from the 74ACT series. It features synchronous presettable loading, two count enable inputs, and a terminal count output for versatile multistage configurations. The device includes an asynchronous Master Reset input that overrides all other functions to force outputs LOW. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a typical count rate of 125 MHz. Outputs provide 24 mA source/sink current with TTL-compatible inputs.

Counter Dividers Feature Summary

• Synchronous counting and parallel loading capabilities ensure accurate state transitions on clock edges.
• Asynchronous Master Reset input provides immediate override of all other logic states.
• TTL-compatible input levels facilitate direct interfacing with standard logic families.
• High drive capability allows direct connection to various loads without additional buffering.

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multi-stage counter chains
• Digital timing control circuits

Counter Dividers Procurement Notes

Verify component authenticity through authorized distributors due to potential obsolescence or replacement variants. Confirm package type matches design requirements as suffixes indicate specific housing styles. Check latest manufacturer notices for lifecycle status changes. Ensure supply chain stability by identifying approved substitute part numbers if primary availability is limited.

Counter Dividers Selection Notes

Select this component for applications requiring precise synchronous counting with asynchronous reset functionality. The ACT series offers faster switching speeds compared to standard AC counterparts while maintaining CMOS power efficiency. Verify interface compatibility with downstream TTL logic if level shifting is not implemented elsewhere in the circuit design.

Counter Dividers Part Context

This part belongs to the 74ACT family of high-speed silicon-gate CMOS logic devices. It shares functional pinouts with LS/ALS161 and HC/HCT161 equivalents but provides superior speed performance. The device is designed for general-purpose digital counting applications where synchronous operation and programmable preset values are required.

Counter Dividers Replacement Considerations

CD74ACT161M from Texas Instruments is a documented similar alternative. Verify pinout compatibility and electrical specifications before substitution. Other compatible parts may include MC74ACT161DG depending on packaging requirements.