SN74HCT85 4-Bit Comparator – Texas Instruments DIP-16 TTL Logic

Overview: SN74HCT85 High-Speed 4-Bit Magnitude Comparator

The SN74HCT85 from Texas Instruments is a high-speed CMOS logic device designed to compare two 4-bit binary numbers. It delivers outputs that indicate whether A is greater than, equal to, or less than B, supporting cascading for extended comparisons. Optimized for TTL input compatibility, the SN74HCT85 offers both low power consumption and fast signal propagation for reliable performance in timing-sensitive digital logic systems.

This component is widely used in digital systems for binary comparison, control decision-making, and address decoding. Its DIP-16 package format makes it ideal for breadboarding and development-stage testing, ensuring ease of integration for engineers.

Key Electrical Specifications and Comparison Outputs

Why SN74HCT85 Offers an Advantage in Comparator IC Selection

Engineers requiring robust digital comparison benefit from the SN74HCT85??s precise logic outputs and ability to cascade multiple devices for extended comparisons. Unlike simpler comparators that only offer binary equality, this model delivers greater-than, equal-to, and less-than outputs simultaneously.

The high-speed CMOS architecture, combined with TTL input compatibility, allows seamless integration into both TTL and CMOS environments without voltage translation issues. These qualities, combined with a wide operating voltage range and ease of prototyping, make the SN74HCT85 a top choice among digital design professionals.

Trusted by engineers in timing-critical applications, SN74HCT85 is consistently recommended in training labs and control system design manuals. For certified sourcing, visit IC Manufacturer.

Detailed Technical Parameters

Typical Use Cases for SN74HCT85

• Microcontroller address comparison
• Arithmetic logic unit (ALU) functions
• Digital sorting and sequencing systems
• Fault detection and monitoring devices
• Real-time control and robotics

Frequently Asked Questions (FAQ)

What does the SN74HCT85 do in digital logic?

It compares two 4-bit binary numbers and indicates whether one is greater than, equal to, or less than the other, aiding in logical decision-making for processors and control units.

Is the SN74HCT85 compatible with TTL logic?

Yes. The device is specifically designed with TTL-compatible input thresholds, ensuring reliable performance in systems that operate with standard TTL voltage levels.

Can this device be used to compare more than 4 bits?

Yes, it supports cascading, so multiple devices can be chained together to handle larger bit-width comparisons in complex digital architectures.

What kind of systems benefit from using the SN74HCT85?

It’s ideal for use in real-time control systems, digital comparators in industrial logic circuits, address decoding in microprocessors, and comparator modules in test equipment.

Is SN74HCT85 suitable for prototyping?

Absolutely. The DIP-16 through-hole package makes it easy to implement on breadboards or socketed PCBs for rapid development and evaluation.