74HCT85PWHL

Comparators Overview

The Nexperia 74HCT85PWHL is a 4-bit magnitude comparator housed in a 16-TSSOP package. It compares two 4-bit binary, BCD, or monotonic codes to determine if input A is greater than, less than, or equal to input B. The device features active high outputs for the three comparison results. It operates within a supply voltage range of 4.5 V to 5.5 V and has a maximum propagation delay of 15 ns. The component supports surface mount installation and functions across an operating temperature range from -40 °C to +125 °C.

Comparators Feature Summary

• Performs magnitude comparison of two 4-bit inputs to generate distinct logic states for greater-than, less-than, and equal conditions.
• Supports cascading expansion to compare words longer than 4 bits by connecting outputs to the expander inputs of subsequent stages.

Comparators Applications

• Process controllers requiring digital value comparison
• Servo-motor control systems
• Positioning feedback loops

Comparators Procurement Notes

Verify the specific suffix HL against the manufacturer's current datasheet to confirm package variant and marking details. Ensure design compatibility with the specified 4.5 V to 5.5 V supply range and TTL input levels. Confirm that the 16-TSSOP footprint matches the target PCB layout requirements before finalizing procurement orders.

Comparators Selection Notes

Select this component when a 4-bit magnitude comparison function is required with TTL-compatible input thresholds. The HCT series ensures compatibility with standard TTL logic families while offering CMOS output drive characteristics. Consider the 16-TSSOP package for applications needing a compact surface-mount solution with sufficient pin count for cascading capabilities.

Comparators Part Context

This part belongs to the 74HCT85 family of digital comparators manufactured by Nexperia. It is designed for general-purpose digital logic applications where precise magnitude determination between two multi-bit values is necessary. The device complies with JEDEC standards for operation and includes ESD protection mechanisms suitable for industrial environments.

Comparators Replacement Considerations

Compatible substitutes include other 74HCT85 variants from different manufacturers, such as those from Texas Instruments or ON Semiconductor, provided they maintain the same 16-TSSOP package and electrical specifications.

Comparators FAQ

How should the expander inputs be connected for standalone 4-bit comparison?

For proper comparison operation without cascading, connect the I_A<B and I_A>B inputs to LOW, and the I_A=B input to HIGH.

What is the logic level compatibility of the 74HCT85PWHL inputs?

As an HCT device, it accepts TTL logic levels at its inputs, ensuring compatibility with standard TTL-driven circuits.