MC74HC161AN

Counter Dividers Overview

The MC74HC161AN is a high-performance silicon-gate CMOS programmable 4-bit binary counter manufactured by onsemi. It features asynchronous reset, parallel load capability, and count enable controls. The device operates within a supply voltage range of 2.0 V to 6.0 V and supports an operating temperature range from -55°C to +125°C. It provides output drive for 10 LSTTL loads and includes a ripple carry output for cascading applications.

Counter Dividers Feature Summary

• Asynchronous reset function that immediately clears outputs upon active low signal
• Synchronous parallel loading of preset data inputs onto counter outputs
• Dual count enable pins (Enable P and Enable T) for flexible control logic
• Ripple carry output generation when the counter reaches its maximum state

Counter Dividers Applications

• N-bit synchronous counters via cascading configurations
• Modulo counters with varying modulus using external logic
• Nibble ripple counters utilizing the ripple carry output

Counter Dividers Procurement Notes

Verify package suffix N corresponds to the PDIP-16 housing. Confirm RoHS compliance status as standard versions may differ from NG variants. Check datasheet revision dates for timing accuracy. Ensure input lines are not left open during operation. Validate supply voltage limits against system requirements before integration.

Counter Dividers Selection Notes

Select this component for designs requiring asynchronous reset behavior distinct from the HC163A synchronous variant. Consider the wide operating temperature range for industrial environments. Evaluate power dissipation constraints given the quiescent current specifications. Ensure interface compatibility with downstream CMOS or TTL logic families.

Counter Dividers Part Context

This part belongs to the 74HC16xA series of high-speed CMOS logic devices. It shares pinout compatibility with older LS161 equivalents while offering improved noise immunity and lower input current characteristics typical of modern silicon-gate CMOS technology. The family includes both asynchronous (161A) and synchronous (163A) reset variants.

Counter Dividers Replacement Considerations

Public confirmed substitute: CD74AC161E Texas Instruments.