M74HC161TTR

Counter Dividers Overview

The M74HC161TTR is a high-speed silicon-gate CMOS device belonging to the 74HC/HCT logic family. It functions as a synchronous presettable 4-bit binary counter with an asynchronous reset. The component features internal look-ahead carry for high-speed counting and is pin-compatible with low-power Schottky TTL (LSTTL). It operates within a wide voltage range of 2 V to 6 V, ensuring compatibility with various digital systems while maintaining balanced propagation delays.

Counter Dividers Feature Summary

• Synchronous counting and loading mechanism utilizing positive-edge triggered clock inputs
• Asynchronous master reset function that clears outputs regardless of other input states
• Internal look-ahead carry capability designed for efficient n-bit cascading applications

Counter Dividers Applications

• Digital frequency division circuits
• Sequential pulse generation systems
• High-speed binary counting modules

Counter Dividers Procurement Notes

Verify the specific suffix 'TTR' against official STMicroelectronics documentation to confirm tape-and-reel packaging specifications. Ensure the order matches the exact 74HC series designation rather than HCT or HC/UH variants, as electrical characteristics differ. Cross-reference the package type and lead finish details provided in the manufacturer's datasheet to guarantee compliance with assembly requirements.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with parallel load capability is required. It is suitable for designs needing compatibility with LSTTL logic levels. Consider the operating voltage range and propagation delay specifications relative to system timing constraints. Verify that the asynchronous reset feature aligns with the desired control logic behavior for the application.

Counter Dividers Part Context

This part belongs to the broader 74HC/HCT logic family produced by STMicroelectronics. These devices are standard CMOS logic components widely used in general-purpose digital electronics. The M74HC161 variant specifically provides 4-bit counting functionality, distinguishing it from other counters like the 74HC163 which may have different reset characteristics or output configurations within the same family.

Counter Dividers Replacement Considerations

Officially documented substitutes include the M74HC161B1R and M74HC161F1R. These variants maintain functional compatibility but differ in plastic or ceramic package formats. Verify pinout and electrical specifications before substitution.