74AC161SJX

Counter Dividers Overview

The Fairchild Semiconductor 74AC161SJX is a synchronous 4-bit binary counter belonging to the 74AC logic family. It features positive edge triggering and an asynchronous reset mechanism. The device operates within a supply voltage range of 2 V to 6 V and supports counting rates up to 167 MHz. Designed for through-hole mounting, it is housed in a 16-SOIC package with a width of 3.90mm. The component functions as a single element with four bits per element, operating reliably across a temperature range of -40°C to 85°C.

Counter Dividers Feature Summary

• Synchronous operation utilizing internal carry look-ahead for high-speed counting applications
• Positive edge-triggered clock input ensuring simultaneous flip-flop transitions
• Asynchronous reset capability for immediate output clearing

Counter Dividers Applications

• High-speed digital counting circuits
• Frequency division networks
• Digital timing sequences

Counter Dividers Procurement Notes

Verify the specific manufacturer origin, as Fairchild Semiconductor operations were acquired by ON Semiconductor. Confirm that the 'SJX' suffix corresponds to the SOIC-16 surface-mount package variant rather than the PDIP through-hole version. Ensure compliance with current RoHS directives, noting that older stock may not meet modern environmental standards.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with AC speed characteristics is required in a surface-mount form factor. Compare against the 74HC161 if lower power consumption is prioritized over switching speed. Verify that the 16-SOIC footprint matches the target PCB design constraints and that the 2V to 6V supply range aligns with the system voltage architecture.

Counter Dividers Part Context

This part belongs to the industry-standard 74AC series of logic integrated circuits. The 74AC161 designation specifically identifies a 4-bit binary counter with synchronous preset functionality. It serves as a fundamental building block for sequential logic designs requiring precise timing control and parallel data loading capabilities within digital systems.

Counter Dividers Replacement Considerations

Public confirmed substitute: CD74AC161E (Texas Instruments). Verify pinout compatibility and package dimensions before substitution.