SN74HC4020DT

Overview

The SN74HC4020DT is a 14-bit asynchronous binary counter manufactured by Texas Instruments in a 16-pin SOIC package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to 85°C. The device advances on the negative-going edge of the clock pulse and resets asynchronously when the clear input goes high. Key electrical characteristics include a maximum propagation delay of 38 ns at 6 V, a typical delay of 12 ns, and a maximum supply current of 80 µA.

Feature Summary

• Asynchronous 14-stage binary ripple-carry counting functionality
• Independent asynchronous reset capability via active-high clear input
• Wide operating voltage compatibility from 2 V to 6 V
• Low power consumption with minimal supply current requirements

Applications

• Digital frequency division circuits
• Time-base generation for digital clocks
• Event counting in industrial control systems
• Address decoding in memory architectures

Procurement Notes

Verify the specific ordering suffix 'D' confirms the SOIC-16 package type. Confirm the status as obsolete or check for the recommended replacement SN74HC4020DR. Ensure RoHS compliance matches project requirements. Validate that the -40°C to 85°C commercial temperature range meets environmental specifications.

Selection Notes

Select this component for designs requiring 14-bit binary counting with asynchronous reset. Verify that the 2 V to 6 V supply range aligns with system power rails. Consider the 38 ns maximum propagation delay for timing constraints. Evaluate the SOIC-16 footprint against available PCB space and assembly capabilities.

Part Context

This part belongs to the SNx4HC4020 family of 14-bit asynchronous binary counters. It utilizes standard CMOS technology compatible with LSTTL loads. The device provides a cost-effective solution for general-purpose counting applications where moderate speed and low power are prioritized over high-frequency performance.

Replacement Considerations

SN74HC4020DR