Texas Instruments

CD74HC85PW

CD74HC85PW Description

The CD74HC85PW from Texas Instruments is a 4-bit magnitude comparator belonging to the 74HC series, designed for high-speed digital logic applications. This surface-mount IC operates within a 2V to 6V supply range, making it versatile for both low-voltage and standard 5V systems. It features active-high outputs (A<B, A=B, A>B) with a maximum propagation delay of 33ns at 6V and 50pF load, ensuring rapid decision-making in comparison tasks. The device is RoHS3 compliant and REACH unaffected, meeting modern environmental standards. Packaged in a 16-pin TSSOP tube, it is optimized for space-constrained PCB designs while maintaining robust performance.

CD74HC85PW Features

• High-Speed Operation: 33ns propagation delay at 6V enables efficient real-time comparison.
• Low Power Consumption: Quiescent current of 8 µA minimizes energy usage in idle states.
• Wide Voltage Range: 2V–6V supply compatibility supports mixed-voltage systems.
• Balanced Output Drive: 5.2mA sink/source current ensures reliable signal integrity.
• Cascadable Design: Expandable for multi-bit comparisons (e.g., 8-bit, 16-bit) via daisy-chaining.
• Robust Packaging: MSL 1 (Unlimited) moisture sensitivity allows extended shelf life and handling flexibility.

CD74HC85PW Applications

• Digital Arithmetic Units: Ideal for ALUs, CPUs, and microcontrollers requiring magnitude checks.
• Process Control Systems: Used in threshold detection (e.g., sensor data validation).
• Test Equipment: Enables fast binary comparison in oscilloscopes or logic analyzers.
• Automotive Electronics: Suitable for battery monitoring due to low-voltage operation.
• Consumer Electronics: Integrates into display drivers for brightness/contrast adjustments.

Conclusion of CD74HC85PW

The CD74HC85PW stands out for its speed, low power, and cascading capability, making it superior to basic comparators in high-performance digital systems. Its wide supply range and TSSOP packaging cater to modern design constraints, while TI’s reliability ensures long-term stability. Whether for embedded systems, industrial automation, or precision instrumentation, this IC delivers efficient, accurate magnitude comparison with minimal overhead.