74HC157 Quad 2-input Multiplexer: Pinout, Datasheet and Circuit

The 74HC157 multiplexer is a high-speed integrated circuit that has four digital multiplexers with two inputs each. This IC employs sophisticated Si gate CMOS technology and is well-matched by Schottky TTL with lower power consumption.

The 74HC157 multiplexer has two inputs: enable and choose, as well as two sets of registers. The chosen input determines which register the data is received from. Its function is determined throughout a temperature range of -55 °C to 125 °C.

74HC157 Symbol

74HC157 Footprint

74HC157 Logic Diagram

74HC157 Logic Symbol

Nexperia USA Inc. 74HC157D,653 technical specifications, attributes, parameters and parts with similar specifications to Nexperia USA Inc. 74HC157D,653.

• Low-power dissipation

• Complies with JEDEC standard no. 7A

• Input levels: For 74HC157: CMOS level

•                     For 74HCT157: TTL level

• Non-inverting data path

• ESD protection: HBM JESD22-A114F exceeds 2 000 V

                                 MM JESD22-A115-A exceeds 200 V

• Specified from 40 C to +85 C and from 40 C to +125 C

• High noise immunity

• It selects 4-bits of data using two sources under a common data select input control.

• The enable (E) input pin is active LOW. Once enable pin (E) is HIGH, then outputs are LOW apart from all other input states.

• Package Type is DIP

• Voltage rating ranges from 2V to 6V

• The current rating is less like 1µA

• Rating of Temperature ranges from -55 to 125 o C

• Number of Pins-16

• Memory of Computer

• Communication Systems

• ALUs (Arithmetic Logic Units)

• Telephone Line Selector

• Network Lines

The 74HC157 is a two-input (2:1) multiplexer integrated circuit. It is known as a Quad package 2-Input Multiplexer because it contains four comparable multiplexers. As we all know, a multiplexer takes two or more inputs and outputs one of them based on the Select line state.

Even though it contains four mux, we are unable to manage each multiplexer separately because all multiplexers are controlled by a single select line. If you need more than one 21 multiplexers in a chip and wish to control each multiplexer with a single select line, this is the best option.

The 74HC157 multiplexer IC is primarily used for multiplexing data in communication channels that would otherwise be unusable. This IC contains four multiplexers with two input pins that can be used in computer memory ALUs as well as to perform Boolean functions.

It's quite simple to use the 74HC157 IC. The IC's operational voltage ranges from 2 to 6 volts, so choose one (usually 5 volts) and power it with the Vcc and Ground pins. For regular IC functioning, the Enable pin must be connected to the ground. Therefore, you can either ground it permanently or link it to an MCU/MPU to turn on or off the Multiplexers as needed.

This IC contains four 2:1 multiplexers, but for the sake of simplicity, we'll assume we're just utilizing one of them. Because the multiplexer is a 2:1 multiplexer, it can accept two inputs. These two inputs are connected to the pins Input A (also known as Input I0) and Input B (also known as Input I1). The multiplexer's output is connected to the output pin Y. The chosen line (pin 1) determines which of the two inputs goes to the output pin. Input A will be reflected on the output pin Y if the Select Line is low (logic 0), and Input B will be reflected on the output pin Y if the Select Line is high (logic 1). The following is a 74HC157 multiplexer circuit.

74HC157 multiplexer circuit

This IC contains four 2:1 multiplexers, but for the sake of simplicity, we'll assume we're just utilizing one of them. Because the multiplexer is a 2:1 multiplexer, it can accept two inputs. These two inputs are connected to the pins Input A (also known as Input I0) and Input B (also known as Input I1). The multiplexer's output is connected to the output pin Y. The chosen line (pin 1) determines which of the two inputs goes to the output pin. Input A will be reflected on the output pin Y if the Select Line is low (logic 0), and Input B will be reflected on the output pin Y if the Select Line is high (logic 1).

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