CD4020AF3

Counter Dividers Overview

The CD4020AF3 is a CMOS 14-stage binary ripple counter from the Harris Corporation 4000/14000/40000 series. It operates asynchronously with negative edge triggering and counts in an up direction. The device features a maximum operating frequency of 3,500,000 Hz at nominal supply voltage and supports a load capacitance of 50 pF. It has no load or preset inputs and provides outputs from 12 stages. The component is housed in a CDIP16 package and functions within a temperature range up to 125 °C.

Counter Dividers Feature Summary

• Asynchronous 14-bit binary counting architecture
• Negative edge triggered operation
• Outputs available from 12 internal stages

Counter Dividers Applications

• Digital frequency division circuits
• Time base generation for digital clocks
• Event counting systems

Counter Dividers Procurement Notes

Verify the specific suffix 'AF3' against the manufacturer's current datasheet to confirm pinout compatibility and material composition. Ensure the ceramic DIP16 package matches the target PCB footprint requirements. Confirm RoHS compliance status as historical data may vary by production batch.

Counter Dividers Selection Notes

Select this component when a high-count asynchronous binary divider is required without preset functionality. Compare the 3.5 MHz maximum frequency against system clock speeds. Verify that the negative edge trigger aligns with the upstream logic output characteristics.

Counter Dividers Part Context

This part belongs to the standard 4000-series CMOS logic family, known for wide voltage operation and low power consumption. It serves as a fundamental building block for sequential logic designs requiring large modulus counters. The CD4020 variant specifically offers 14 bits, exceeding the capacity of the 12-bit CD4024.

Counter Dividers Replacement Considerations

CD4020BF: Direct equivalent from Harris with identical specifications and packaging.