This document describes a 4-bit magnitude comparator that can be used to compare straight binary or BCD codes. It features high expandability, low power dissipation, and short delay times.
This document is a technical datasheet for the 5485, DM5485, and DM7485 series of 4-bit magnitude comparators manufactured by National Semiconductor. These devices perform comparisons on two 4-bit words (A and B) using straight binary or Binary Coded Decimal (BCD) codes.
| Typical power dissipation | 275 mW |
|---|---|
| Typical delay (4-bit words) | 23 ns |
| High Level Input Voltage | 2V |
| Low Level Output Current (DM5485) | -0.8 mA |
These devices perform comparison of straight binary or BCD codes.
They are fully expandable by connecting comparators in cascade, linking outputs of less-significant bits to inputs of more-significant bits.