CD74HC85PWTE4

Comparators Overview

The CD74HC85PWTE4 is a high-speed CMOS logic device functioning as a 4-bit magnitude comparator. It compares two 4-bit binary numbers to determine if input A is less than, equal to, or greater than input B. The component operates within a supply voltage range of 2 V to 6 V and supports propagation delays up to 33 ns at 6 V with 50 pF load capacitance. It features active-high outputs and is housed in a 16-pin TSSOP package. The device is rated for operation between -55°C and +125°C.

Comparators Feature Summary

• Performs 4-bit magnitude comparison with cascading capability for extended bit widths
• Provides three distinct active-high outputs indicating less than, equal to, or greater than relationships
• Operates with low power consumption typical of high-speed CMOS technology

Comparators Applications

• Digital arithmetic logic units requiring magnitude comparison
• Address decoding systems in microprocessor interfaces
• Control logic for sorting algorithms in embedded systems

Comparators Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and environmental standards as per Texas Instruments documentation. Confirm the TSSOP-16 package dimensions match your PCB footprint requirements. Ensure the operating temperature range of -55°C to +125°C aligns with your system's thermal environment. Cross-reference the datasheet revision date to ensure compatibility with current design specifications.

Comparators Selection Notes

Select this component when a 4-bit magnitude comparison function is required in a surface-mount design. The HC series offers speed suitable for general-purpose digital logic applications. Consider the TSSOP-16 package for space-constrained boards. Verify that the 2 V to 6 V supply voltage range matches the system power rails. Check if cascading inputs are needed for comparisons exceeding 4 bits.

Comparators Part Context

This part belongs to the Texas Instruments 74HC family of high-speed CMOS logic devices. The 74HC85 series specifically provides magnitude comparison functionality. The 'PWT' designation identifies the 16-pin TSSOP package type, while 'E4' typically denotes environmental compliance attributes such as lead-free status. This series is widely used in consumer electronics and industrial control systems.

Comparators Replacement Considerations

Compatible substitutes include the CD74HC85M96E4 (SOIC-16 package) and CD74HC85E (PDIP-16 package). These parts share identical logical functionality but differ in physical packaging. Verify pinout compatibility and thermal performance before substitution.