MM74HC161SJX

Counter Dividers Overview

The MM74HC161SJX is a synchronous 4-bit binary counter manufactured by Fairchild Semiconductor, utilizing advanced silicon-gate CMOS technology. It features internal look-ahead carry logic for high-speed counting applications. The device operates on a positive edge-triggered clock input and supports asynchronous clear functionality. Key electrical parameters include a typical operating frequency of 40 MHz and a typical propagation delay from clock to output of 18 ns. It functions within a wide power supply range of 2V to 6V, offering low quiescent current of up to 80 µA and low input current of 1 µA maximum.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting with internal look-ahead carry logic
• Positive edge-triggered clocking mechanism
• Asynchronous clear capability
• High noise immunity and low power consumption inherent to CMOS technology

Counter Dividers Applications

• High-speed counting applications
• Digital timing circuits
• Frequency division circuits

Counter Dividers Procurement Notes

Verify the specific suffix 'SJX' against official Fairchild documentation to confirm package type and tape/reel specifications. Ensure compatibility with existing board designs regarding pinout and voltage levels. Cross-reference with equivalent parts if original sourcing is restricted.

Counter Dividers Selection Notes

Select this component for designs requiring synchronous 4-bit binary counting with low power consumption. Consider the 2V to 6V supply range and 40 MHz typical frequency for speed requirements. Verify that the asynchronous clear feature meets system reset needs compared to synchronous alternatives like the HC163.

Counter Dividers Part Context

This part belongs to the 74HC series of logic integrated circuits, known for compatibility with low-power Schottky TTL speeds while maintaining CMOS advantages. The MM74HC161 variant specifically provides synchronous presettable counting capabilities, distinguishing it from asynchronous counters in its family.

Counter Dividers Replacement Considerations

Equivalent parts include MM74HC163 (synchronous clear) or SN74HC161 from Texas Instruments. Verify functional differences such as clear type before substitution.