74ACT161SCX

Counter Dividers Overview

The Fairchild Semiconductor 74ACT161SCX is a high-speed, low-power synchronous 4-bit binary counter from the ACT series. It features parallel load capability, asynchronous reset, and count-enable controls for programmable counting operations. The device utilizes silicon-gate CMOS technology to ensure compatibility with TTL and NMOS input levels while providing outputs that interface directly with CMOS, NMOS, and TTL loads. Designed for surface-mount applications, it operates within a voltage range of 4.5V to 5.5V.

Counter Dividers Feature Summary

• Synchronous operation with buffered positive-edge-triggered clocking
• Parallel load functionality for presettable counting
• Asynchronous reset control for immediate output clearing
• TTL-compatible input levels for broad system integration

Counter Dividers Applications

• High-speed digital counting circuits
• Frequency division networks
• Timing sequence generation systems
• Programmable modulo counters

Counter Dividers Procurement Notes

Verify the specific suffix 'SCX' against official datasheets to confirm package type and lead-free status. Ensure the component matches the required operating temperature range and voltage specifications for your design. Cross-reference the manufacturer part number with current onsemi or Fairchild documentation to confirm availability and pinout consistency.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with parallel load is required in a surface-mount form factor. It serves as a suitable alternative to LS/ALS161 variants where higher speed and lower power consumption are necessary. Consider its TTL-compatible inputs for interfacing with legacy logic families.

Counter Dividers Part Context

This part belongs to the 74ACT family of advanced CMOS logic devices, offering performance comparable to Schottky TTL but with significantly lower power dissipation. The 74ACT161 variant specifically provides a 4-bit binary counting function, distinguishing it from decade counters like the 74ACT162. It shares pinouts with other standard 4-bit counters for easy design migration.

Counter Dividers Replacement Considerations

Public confirmed substitute part numbers include IN74ACT161D.