74F161ASJX

Overview

The Fairchild Semiconductor 74F161ASJX is a high-speed synchronous modulo-16 binary counter belonging to the F/FAST logic series. It features four-bit up-counting capability with synchronous preset loading and two count enable inputs. The device includes a terminal count output for versatile multi-stage expansion. It operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in an SOP-16 package. The component utilizes bipolar technology and provides true outputs for direct interfacing with digital systems.

Feature Summary

• Synchronous counting and parallel loading mechanism
• High-speed synchronous expansion via terminal count output
• Asynchronous master reset input overriding all other functions

Applications

• Programmable frequency dividers
• Synchronous multi-stage counter construction
• Digital timing sequence generation

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance status and moisture sensitivity level prior to integration. Ensure storage conditions meet specified limits to prevent degradation. Validate pin compatibility with target PCB footprint. Review datasheet revisions for any functional updates affecting system design.

Selection Notes

Select this component when high-speed synchronous binary counting is required in space-constrained designs. The SOP-16 package suits surface-mount applications. Bipolar F-series technology offers faster switching than standard TTL variants. Verify power supply stability within the 4.5 V to 5.5 V range. Consider thermal dissipation requirements for dense circuit layouts.

Part Context

This part belongs to the 74F161A family of synchronous binary counters. It shares functional similarities with the 74F163A, though the latter features synchronous reset instead of asynchronous. The F-series denotes high-speed bipolar logic. Equivalent parts from other manufacturers may exist but require pinout and electrical parameter verification.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.