The Story
Quad 2-Input Multiplexer IC - 74HC157
The 74HC Series 74HC157 is a 16-Pin Quad 2-Input Multiplexer IC having 2V to 6V Operating Voltage range with 1uA Low Input current and high noise immunity. It selects 4 bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.
Pinout:
|
Pin Number |
Pin Name |
Description |
|
2,5,11,14 |
Input A |
This is the first input line of the 2:1 Multiplexer |
|
3,6,10,13 |
Input B |
This is the second input line of the 2:1 Multiplexer |
|
4,7,9,12 |
Output Y |
This is the output line pin of the Multiplexer |
|
1 |
Line Select (S) |
The select pin selects one of the two input lines and gives it to the output line |
|
15 |
Enable (E) |
Active low pin. Grounded for normal operation |
|
8 |
Ground |
Connected to the ground of the system |
|
16 |
Vcc |
This pin powers the IC, typically +5V is used. |
Also check 74LS161 Synch 4-Bit Counter. It has an operating voltage range of 4.5V to 5.5V and a temperature range of -55°C to +125°C
Description
Quad 2-Input Multiplexer IC - 74HC157
The 74HC Series 74HC157 is a 16-Pin Quad 2-Input Multiplexer IC having 2V to 6V Operating Voltage range with 1uA Low Input current and high noise immunity. It selects 4 bits of data from two sources under the control of a common data select input (S). The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions.
Pinout:
|
Pin Number |
Pin Name |
Description |
|
2,5,11,14 |
Input A |
This is the first input line of the 2:1 Multiplexer |
|
3,6,10,13 |
Input B |
This is the second input line of the 2:1 Multiplexer |
|
4,7,9,12 |
Output Y |
This is the output line pin of the Multiplexer |
|
1 |
Line Select (S) |
The select pin selects one of the two input lines and gives it to the output line |
|
15 |
Enable (E) |
Active low pin. Grounded for normal operation |
|
8 |
Ground |
Connected to the ground of the system |
|
16 |
Vcc |
This pin powers the IC, typically +5V is used. |
Also check 74LS161 Synch 4-Bit Counter. It has an operating voltage range of 4.5V to 5.5V and a temperature range of -55°C to +125°C
