MM74HC161M

Counter Dividers Overview

The MM74HC161M is a synchronous 4-bit binary counter manufactured by onsemi (formerly Fairchild Semiconductor). It utilizes advanced silicon-gate CMOS technology and internal look-ahead carry logic for high-speed counting applications. The device features asynchronous clear functionality, where the counter resets immediately upon a LOW signal on the CLEAR input, independent of the clock. It supports synchronous presetting via the LOAD input and includes two active HIGH enable inputs (ENP and ENT) to facilitate cascading. The component operates within a wide power supply range of 2V to 6V.

Counter Dividers Feature Summary

• Synchronous 4-bit binary counting with positive edge triggering
• Asynchronous clear function for immediate reset
• Internal look-ahead carry logic for high-speed operation
• Wide power supply voltage range capability

Counter Dividers Applications

• High speed counting applications
• Cascaded N-bit counter implementations
• Digital timing circuits requiring precise synchronization

Counter Dividers Procurement Notes

Verify that the specific part number corresponds to the SOIC-16 package variant designated as M16A. Confirm the manufacturer origin, as this component was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Ensure compliance with RoHS standards if required for the specific manufacturing batch. Check for any suffixes indicating tape and reel packaging options.

Counter Dividers Selection Notes

Select the MM74HC161M when an asynchronous clear mechanism is required for immediate counter reset. This component is suitable for designs needing synchronous preset capabilities alongside standard counting functions. Consider the HC series characteristics for low power consumption combined with speeds comparable to low power Schottky TTL. Evaluate the operating frequency requirements against the guaranteed limits at the intended supply voltage.

Counter Dividers Part Context

This component belongs to the MM74HC16x family of synchronous binary counters. It is functionally similar to the MM74HC163 but differs in its clear mechanism; the MM74HC163 employs a synchronous clear while the MM74HC161 uses an asynchronous clear. Both share identical counting, preset, and enable functionalities. The HC series represents a standard CMOS logic family known for broad compatibility and performance balance.

Counter Dividers Replacement Considerations

MM74HC163N

Counter Dividers FAQ

How does the clear function operate on the MM74HC161?

The MM74HC161 features an asynchronous clear. When the CLEAR input is taken LOW, the counter outputs are cleared immediately, regardless of the state of the CLOCK input.

What is the maximum recommended power supply voltage?

The recommended operating conditions specify a maximum supply voltage (VCC) of 6V.