The 74HC85 is a 4-bit magnitude comparator integrated circuit (IC) designed to compare two 4-bit binary or BCD (Binary-Coded Decimal) numbers. It provides outputs indicating whether one number is greater than, less than, or equal to the other. This IC is useful in various digital applications where comparison operations are necessary.
Key Specifications:
- Type: 4-Bit Magnitude Comparator
- Package: DIP-16 (Dual In-line Package)
- Supply Voltage (Vcc):
- Minimum: 4.75V
- Typical: 5V
- Maximum: 5.25V
- Input Voltage Levels:
- High Level (VIH): Minimum of 2.0V
- Low Level (VIL): Maximum of 0.8V
- Operating Temperature Range: 0°C to +70°C
- Propagation Delay:
- Low-to-High Output: Approximately 22 ns
- High-to-Low Output: Approximately 15 ns
Pin Configuration:
Pin Number | Pin Name | Description |
---|---|---|
1 | B3 | Input for the third bit of B |
2 | A<B | Output indicating A is less than B |
3 | A=B | Output indicating A is equal to B |
4 | A>B | Output indicating A is greater than B |
5 | A>B Out | Direct output for A > B |
6 | A=B Out | Direct output for A = B |
7 | A<B Out | Direct output for A < B |
8 | GND | Ground connection |
9 | B0 | Input for the least significant bit of B |
10 | A0 | Input for the least significant bit of A |
11 | B1 | Input for the second bit of B |
12 | A1 | Input for the second bit of A |
13 | A2 | Input for the third bit of A |
14 | B2 | Input for the third bit of B |
15 | A3 | Input for the most significant bit of A |
16 | Vcc | Positive supply voltage |
Features:
- Compares Two Binary or BCD Codes: Outputs indicate whether one value is greater than, less than, or equal to another.
- Direct Interface Compatibility: Compatible with CMOS, NMOS, and TTL logic families.
- Cascading Capability: Can be easily expanded to compare larger bit-width values by cascading multiple comparators.
- Wide Operating Conditions: Operates effectively across a broad range of supply voltages and temperatures.
Applications:
The 74HC85 IC is commonly used in:
- Digital Comparators: Used in devices that require comparison functions, such as digital clocks and calculators.
- Arithmetic Logic Units (ALUs): Essential in CPUs and microcontrollers for performing comparison operations.
- Data Processing Systems: Employed in systems that need to evaluate data conditions and make decisions based on comparisons.
Package Included:
1 x 74HC85 DIP 4-Bit Magnitude Comparator IC. Please note that the product image is for illustrative purposes only. The actual product may vary slightly in appearance!
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