SN74HC4020DR

Overview

The SN74HC4020DR is a 14-stage asynchronous binary ripple counter manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and advances on the negative-going edge of the clock pulse. The device features an overriding asynchronous master reset input that clears all outputs to low independently of the clock state. Packaged in a 16-pin SOIC format, it provides buffered parallel outputs for digital counting applications.

Feature Summary

• Asynchronous binary ripple counter with 14 stages
• Negative-going clock edge triggering mechanism
• Overriding asynchronous master reset function
• CMOS low power dissipation design

Applications

• Frequency dividing circuits
• Time delay circuits
• Control counters

Procurement Notes

Verify the specific ordering suffix 'DR' corresponds to the tape-and-reel packaging configuration. Confirm the active production status directly with Texas Instruments or authorized distributors, as component availability and lifecycle status are subject to change without notice.

Selection Notes

Select this component when a 14-bit asynchronous count sequence is required. Ensure the operating environment stays within the -40°C to +85°C temperature range. Verify that the system logic levels match the CMOS input specifications defined in the datasheet.

Part Context

This part belongs to the SNx4HC4020 family of 14-bit asynchronous binary counters. It is designed for general-purpose digital logic applications requiring sequential counting functions. The device utilizes standard CMOS technology for compatibility with various logic families.

Replacement Considerations

SN74HC4020D (Tube)

FAQ

How does the master reset input affect the counter?

A high signal on the master reset input clears all counter stages and forces all outputs low, independent of the clock input state.

What triggers the counter to advance?

The counter advances to the next stage on the negative-going edge (HIGH-to-LOW transition) of the clock pulse.