7485 4-Bit Magnitude Comparator IC (DIP)

Product Overview: 7485 4-Bit Magnitude Comparator IC (DIP)

The 7485 4-Bit Magnitude Comparator IC is a high-speed TTL logic device used to compare two 4-bit binary values. It evaluates whether input A is less than, equal to, or greater than input B and provides dedicated logic outputs for each condition. Packaged in a Dual Inline Package (DIP), the 7485 is easy to prototype on breadboards or mount on PCBs for digital system designs.

Key Features of the 7485 4-Bit Magnitude Comparator IC

• Compares two 4-bit binary numbers (A and B) and asserts A<B, A=B, or A>B outputs
• TTL-compatible logic levels for use with standard TTL families
• Cascadable inputs/outputs to extend comparison to wider bit-widths
• DIP package for convenient prototyping and circuit integration
• Low propagation delay and dependable performance in digital applications

How the 7485 Magnitude Comparator Works

The comparator receives two parallel 4-bit inputs (A3..A0 and B3..B0). Internally it performs bitwise and hierarchical comparisons to determine the relationship between the two numbers and drives three outputs indicating A<B, A=B, and A>B. Cascade inputs allow the device to accept results from a less-significant comparator and produce correct outputs for multi-chip comparisons.

Cascading for Larger Bit Comparisons

• Chain multiple 7485 devices to compare binary numbers larger than 4 bits.
• Use the cascade inputs/outputs to propagate equality or inequality status between stages.
• Commonly used in multi-byte comparisons, sorting networks, and ALU implementations.

TTL Compatibility and Package

Built on TTL logic technology, the 7485 integrates seamlessly with other TTL devices and standard digital logic families. The DIP form factor makes it ideal for breadboard testing and through-hole PCB assemblies, offering straightforward wiring and replacement.

Applications

• Binary number comparison in digital circuits
• Sorting and priority determination
• Data processing systems and control logic
• Digital measuring instruments and logic analyzers
• Arithmetic and Logical Unit (ALU) comparison functions

Benefits of Using the 7485 4-Bit Comparator

• Fast and predictable comparison results for real-time logic decisions
• Easy expansion to wider bit-widths via cascading
• Simple integration with TTL-based designs and prototyping setups
• Useful in both educational projects and industrial digital systems

Notes

Note: Images are for illustration purposes only.