74ACT161SC

Counter Dividers Overview

The Fairchild Semiconductor 74ACT161SC is a synchronous 4-bit binary counter belonging to the ACT series. It operates on a positive edge-triggered clock and counts in an up direction. The device utilizes CMOS technology and is housed in a 16-pin SOIC package (PDSO16). Key electrical parameters include a supply voltage range of 4.5V to 5.5V, a maximum output current of 24mA, and a load capacitance of 50pF. It features synchronous loading capabilities and includes a terminal count output for cascading applications.

Counter Dividers Feature Summary

• Synchronous counting operation triggered by the positive edge of the clock signal
• Parallel load capability allowing presettable data input
• Terminal count output designed for multi-stage cascading

Counter Dividers Applications

• High-speed synchronous counting designs
• Programmable frequency dividers
• Cascaded multi-stage counter systems

Counter Dividers Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor operations have transitioned to onsemi. Confirm RoHS compliance status, as some legacy databases list this part as non-compliant while newer equivalents may differ. Ensure the SOIC-16 package matches the required footprint and that the ACT logic family specifications align with the target circuit design requirements.

Counter Dividers Selection Notes

Select this component when a synchronous 4-bit binary counter with parallel load functionality is required within the ACT logic family. It serves as a direct functional replacement for other 74LS161 or 74HC161 variants where speed and CMOS compatibility are prioritized. Verify that the operating temperature range and voltage levels meet the system specifications before integration.

Counter Dividers Part Context

The 74ACT161SC is part of the broader 74ACT logic family, which combines the high speed of Schottky TTL with the low power consumption of CMOS technology. This specific model is a 4-bit binary counter, distinct from decade counters like the 74ACT162. It shares pinout compatibility with LS/ALS161 devices, facilitating easier upgrades in existing designs requiring higher performance.

Counter Dividers Replacement Considerations

Public confirmed substitute part numbers include CD74ACT161M and CD74ACT161M96 from Texas Instruments.