MC74F161AM

Counter Dividers Overview

The MC74F161AM is a synchronous 4-bit binary counter manufactured by onsemi, belonging to the 74F logic family. It features a positive-edge triggered clock input and supports up-counting operations. The device includes asynchronous master reset functionality that forces outputs low regardless of other inputs. It utilizes a 16-pin SOP surface-mount package and operates within a supply voltage range of 4.5 V to 5.5 V. The component is designed for high-speed applications with a typical propagation delay of 10 ns.

Counter Dividers Feature Summary

• Synchronous presettable binary counting architecture
• Asynchronous master reset capability overriding all inputs
• High-speed synchronous expansion terminals for multi-stage configurations

Counter Dividers Applications

• Programmable frequency dividers
• Synchronous multi-stage counter systems
• Digital timing sequence generation

Counter Dividers Procurement Notes

Verify the specific suffix AM against official datasheets to confirm package type and temperature rating. Confirm RoHS compliance status as older variants may differ. Check current lifecycle status since this series often faces obsolescence. Ensure pinout compatibility with existing PCB footprints before procurement.

Counter Dividers Selection Notes

Select this component when synchronous loading and high-speed operation are required in a bipolar logic environment. Compare against 74AC or 74HC families if lower power consumption is necessary. Verify that the 5V supply constraint aligns with system requirements. Consider package availability constraints for surface-mount assembly processes.

Counter Dividers Part Context

This part belongs to the 74F (FAST) logic family known for high speed but higher power consumption compared to CMOS alternatives. It serves as a direct functional equivalent to Fairchild's 74F161A. The device is widely used in legacy digital designs requiring precise synchronous control and fast counting rates.

Counter Dividers Replacement Considerations

• SN74F161ANSR
• MC74F161AN

Counter Dividers FAQ

Does the MC74F161AM support parallel data loading?

Yes, it is a synchronous presettable counter allowing parallel data entry via dedicated inputs.

What triggers the count operation?

Counting occurs on the positive edge of the clock signal when enable inputs are active.