74F161ASCX

Overview

The Fairchild Semiconductor 74F161ASCX is a high-speed synchronous modulo-16 binary counter belonging to the F/FAST series. It features synchronous presettable loading, enabling applications in programmable dividers and multi-stage counters. The device includes two Count Enable inputs and a Terminal Count output for versatile expansion. It operates with TTL logic levels and utilizes a surface-mount package.

Feature Summary

• Synchronous counting and parallel loading capabilities
• High-speed synchronous expansion via dedicated outputs
• Terminal Count output for cascading stages

Applications

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

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm RoHS compliance status as datasheets may vary by production batch. Ensure the specific suffix matches required packaging and lead-free specifications before procurement.

Selection Notes

Select this component for designs requiring precise synchronous operation at high frequencies. Compare against asynchronous alternatives if reset latency is critical. Verify voltage compatibility with system logic levels and ensure thermal management suits the surface-mount package constraints.

Part Context

This part belongs to the 74F family of high-speed Schottky TTL logic devices. It serves as a successor to standard 74LS counters, offering significantly faster switching speeds while maintaining functional compatibility with existing TTL-based digital systems and interfaces.

Replacement Considerations

The 74F163ASCX is a compatible alternative featuring synchronous reset instead of asynchronous reset. Other F-series counters from Fairchild or ON Semiconductor may serve as direct replacements if pinout and speed requirements align.