74LS85 4-Bit Magnitude Comparator IC
What is a 4-bit Magnitude Comparator?
A 4-bit magnitude comparator compares two binary numbers each of four bits. It consists of eight inputs each for two four bit numbers and three outputs to generate less than, equal to and greater than between two binary numbers.
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74LS85 IC is a member of the 74XXYY IC series. The 74LS85 IC has a wide range of working voltage, a wide range of working conditions, and directly interfaces with CMOS, NMOS, and TTL. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The 74LS85 is a 4-Bit Magnitude Comparator which compares two 4-bit words (A, B), each word having four Parallel Inputs (A0–A3, B0–B3); A3, B3 being the most significant inputs (MSBs).
What is a 4-bit Magnitude Comparator?
A 4-bit magnitude comparator compares two binary numbers each of four bits. It consists of eight inputs each for two four bit numbers and three outputs to generate less than, equal to and greater than between two binary numbers.
74LS85 Pinout
74LS85 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | B3 | Data Input B3 |
| 2 | I (A<B) | Cascading Input (A<B) |
| 3 | I (A=B) | Cascading Input (A=B) |
| 4 | I (A>B) | Cascading Input (A>B) |
| 5 | O (A<B) | Output pin (A<B) |
| 6 | O(A=B) | Output pin (A=B) |
| 7 | O(A>B) | Output pin (A>B) |
| 8 | GND | Ground Pin |
| 9 | B0 | Data Input B0 |
| 10 | A0 | Data Input A0 |
| 11 | B1 | Data Input B1 |
| 12 | A1 | Data Input A1 |
| 13 | A2 | Data Input A2 |
| 14 | B2 | Data Input B2 |
| 15 | A3 | Data Input A3 |
| 16 | VCC | Supply Voltage |
74LS85 Features & Specifications
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25
- Bits (#): 4
- Operating Voltage (Nom): 5V
- The frequency at a normal voltage (Max): 35MHz
- Propagation delay (Max): 35ns
- IOL (Max): 16mA
- IOH (Max):-0.4mA
- Rating: Catalog
- Operating temperature range: 0°C to 70°C
- Available in 14-pin PDIP, GDIP, PDSO packages
Application
- PCs and notebooks
- Digital Electronics
- Network equipment
- Televisions
You can download this Datasheet for 74LS85 4-Bit Magnitude Comparator from the link given below:
- Technology Family: LS
- VCC (Min): 4.75V
- VCC (Max): 5.25
- Bits (#): 4
- Operating Voltage (Nom): 5V
- The frequency at a normal voltage (Max): 35MHz
- Propagation delay (Max): 35ns
- IOL (Max): 16mA
- IOH (Max):-0.4mA
- Rating: Catalog
- Operating temperature range: 0°C to 70°C
- Available in 14-pin PDIP, GDIP, PDSO packages
