SN74AS161NSR

Counter Dividers Overview

The SN74AS161NSR is a synchronous 4-bit binary counter from the Texas Instruments AS logic series. It features an asynchronous clear input and operates within a supply voltage range of 4.5 V to 5.5 V. The device utilizes a 16-pin SOIC surface-mount package and supports a maximum clock frequency of 40 MHz. It functions as an up-counter with parallel data inputs for loading, providing Q outputs for state indication.

Counter Dividers Feature Summary

• Synchronous counting architecture with asynchronous clear functionality
• High-speed operation capability suitable for demanding digital timing applications
• Parallel data loading feature allows direct presetting of counter states

Counter Dividers Applications

• Digital timing and sequencing circuits
• Frequency division networks
• Event counting systems

Counter Dividers Procurement Notes

Verify the specific manufacturer datasheet revision to confirm pinout compatibility and electrical characteristics against current design requirements. Ensure that the AS logic family specifications align with the target system's power and signal integrity constraints before finalizing component selection.

Counter Dividers Selection Notes

Select this component when high-speed synchronous counting is required alongside parallel load capabilities. The AS series offers superior speed compared to standard TTL or ALS variants. Confirm that the 16-pin SOIC package fits the available PCB footprint and that the 4.5 V to 5.5 V operating range matches the system power supply.

Counter Dividers Part Context

This part belongs to the SN74AS161 family of synchronous 4-bit binary counters. It is functionally equivalent to other industry-standard 74LS161 devices but provides significantly faster propagation delays and higher clock frequencies due to the Advanced Schottky (AS) technology used in its construction.

Counter Dividers Replacement Considerations

The SN74ALS161BNSR is documented as a parameter-equivalent substitute. Verify functional compatibility and electrical limits before swapping.