74HC4520PW/S400J

Counter Dividers Overview

The Nexperia 74HC4520PW/S400J is a dual 4-bit internally synchronous binary counter housed in a TSSOP-16 surface-mount package. It operates within a supply voltage range of 2.0 V to 6.0 V and supports an extended industrial temperature range from -40 °C to +125 °C. The device features two independent clock inputs (nCP0 and nCP1) per counter, allowing flexible clocking or enable configurations. Buffered outputs are available for all four bit positions, and an asynchronous master reset input provides immediate clearing of the count state.

Counter Dividers Feature Summary

• Dual independent 4-bit synchronous binary counting capability with buffered outputs
• Flexible clocking architecture supporting two distinct clock inputs per counter section
• Asynchronous master reset function that clears outputs independently of clock signals
• High noise immunity and robust latch-up performance compliant with JEDEC standards

Counter Dividers Applications

• Multistage synchronous counting systems
• Multistage asynchronous counting applications
• Frequency divider circuits

Counter Dividers Procurement Notes

Verify the specific suffix /S400J against official Nexperia documentation to confirm tape-and-reel specifications and packaging details. Ensure compatibility with standard TSSOP-16 footprint requirements during PCB layout. Confirm that the operating environment remains within the specified -40 °C to +125 °C thermal limits for reliable long-term operation.

Counter Dividers Selection Notes

Select this component when dual independent 4-bit counters are required in a compact surface-mount form factor. The wide 2.0 V to 6.0 V supply range allows integration into various logic families. Consider the TSSOP-16 package for space-constrained designs requiring high pin density and reliable soldering characteristics for automated assembly processes.

Counter Dividers Part Context

This part belongs to the Nexperia 74HC series, which offers CMOS low power dissipation and high noise immunity. The 74HC4520 specifically addresses applications needing multiple synchronous counters without external wiring complexity. It complements other 74HC logic devices by providing precise timing control and state management in digital systems.

Counter Dividers Replacement Considerations

Direct functional substitutes include the 74HCT4520 for TTL-compatible input levels. Other variants within the 74HC4520 family may offer different packaging options such as SO16 or DHVQFN20 while maintaining identical electrical functionality.

Counter Dividers FAQ

How does the clocking mechanism work for the two inputs?

The counter advances on the LOW-to-HIGH transition of nCP0 when nCP1 is HIGH, or on the HIGH-to-LOW transition of nCP1 when nCP0 is LOW. One input serves as the clock while the other acts as an enable.

What is the function of the asynchronous master reset?

A HIGH signal on the master reset input immediately resets all outputs (nQ0 to nQ3) to LOW, regardless of the state of the clock inputs or current count value.