M74HC4520RM13TR

Counter Dividers Overview

The M74HC4520RM13TR is a high-speed CMOS dual 4-bit binary counter manufactured by STMicroelectronics. It contains two identical internally synchronous counters built with silicon gate C2MOS technology. The device operates within a supply voltage range of 2V to 6V and features interchangeable clock and enable inputs for incrementing on either positive-going or negative-going transitions. It includes asynchronous reset capabilities and protection circuits against static discharge.

Counter Dividers Feature Summary

• Dual synchronous 4-bit binary counting architecture
• Interchangeable clock and enable input configurations
• Asynchronous active-low clear functionality
• Integrated electrostatic discharge protection

Counter Dividers Applications

• Digital frequency division circuits
• Sequential logic timing control systems
• Ripple-mode cascaded counting applications

Counter Dividers Procurement Notes

Verify component authenticity through authorized channels as the part is marked obsolete. Confirm package integrity upon receipt, specifically checking for SO-16 physical conformity. Review current datasheet revisions for any updated handling instructions before integration into final designs.

Counter Dividers Selection Notes

Select this component when dual independent 4-bit counters are required in a single package. Ensure the design accommodates the specified operating temperature range of -55°C to 125°C. Verify that the system voltage aligns with the 2V to 6V operational limits for optimal noise immunity and power dissipation characteristics.

Counter Dividers Part Context

This device belongs to the M74HC4520 series, representing high-speed CMOS logic compatible with standard 74-series pinouts. It utilizes silicon gate C2MOS technology to achieve low power dissipation while maintaining symmetrical output impedance and balanced propagation delays across its internal stages.

Counter Dividers Replacement Considerations

CD74HC4520 (Texas Instruments)

Counter Dividers FAQ

How does the M74HC4520 handle clock polarity?

The counter stages utilize D-type flip-flops with interchangeable clock and enable inputs, allowing the counter to advance on either positive-going or negative-going transitions.

What is the method for cascading these counters?

Cascading is achieved in ripple mode by connecting the Q4 output of one counter to the enable input of the subsequent counter, while holding the latter's clock input permanently low.