74157 IC

The 74157 IC is a Quad 2-to-1 Multiplexer integrated circuit. It is commonly used in digital circuits for selecting one of two data sources. Here's a simple overview:

Key Features:

• Function: Multiplexes (selects) one of two 4-bit data inputs and outputs the selected data.
• Input/Output:
  • Inputs:
    • Four pairs of data inputs (A and B).
    • One select input (S).
    • One enable input (G, active LOW).
  • Output: Four data outputs.
• Operation:
  • When Enable (G) is LOW, the IC is active.
  • The Select (S) pin chooses between the two data inputs:
    • S = 0 → Input A is selected.
    • S = 1 → Input B is selected.
• Logic Family: TTL (Transistor-Transistor Logic).
• Package: Available in DIP (Dual In-line Package) and other formats.

Applications:

• Data routing and selection in digital circuits.
• Building complex logic systems.
• Signal multiplexing in communication systems.

Pin Configuration:

1. A0 - Data input A (bit 0)
2. B0 - Data input B (bit 0)
3. Y0 - Data output (bit 0)
4. A1 - Data input A (bit 1)
5. B1 - Data input B (bit 1)
6. Y1 - Data output (bit 1)
7. GND - Ground
8. A2 - Data input A (bit 2)
9. B2 - Data input B (bit 2)
10. Y2 - Data output (bit 2)
11. A3 - Data input A (bit 3)
12. B3 - Data input B (bit 3)
13. Y3 - Data output (bit 3)
14. Select (S) - Select input
15. Enable (G) - Active LOW enable input
16. VCC - Power supply