Encyclopedia Entry: 74ACT157MTCX

Product Overview

Category

The 74ACT157MTCX belongs to the category of integrated circuits (ICs) and specifically falls under the family of multiplexers.

Use

This IC is primarily used for data selection and routing purposes in digital electronic systems. It allows multiple input signals to be selectively routed to a single output line, based on control inputs.

Characteristics

• High-speed operation: The 74ACT157MTCX is designed to operate at high speeds, making it suitable for applications that require quick data selection.
• Low power consumption: This IC is designed to minimize power consumption, making it energy-efficient.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 6V.
• Compatibility: The 74ACT157MTCX is compatible with both TTL and CMOS logic levels, allowing for easy integration into various digital systems.

Package and Quantity

The 74ACT157MTCX is available in a small outline integrated circuit (SOIC) package. It is supplied in tape and reel packaging, with a quantity of 250 units per reel.

Specifications

• Number of Inputs: 4
• Number of Control Inputs: 2
• Number of Outputs: 1
• Operating Voltage Range: 2V to 6V
• Propagation Delay Time: 5 ns (typical)
• Output Current: ±24 mA
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The pin configuration of the 74ACT157MTCX is as follows:

+---+--+---+ A0 -|1 +--+ 16|- VCC A1 -|2 15|- Y B0 -|3 14|- B B1 -|4 13|- C S0 -|5 74ACT157MTCX 12|- GND S1 -|6 11|- D Y -|7 10|- A GND -|8 9|- C +-----------+

Functional Features

The 74ACT157MTCX is a quad 2-input multiplexer with common select inputs (S0 and S1). It allows the user to choose one of the four input lines (A, B, C, or D) to be connected to the output line (Y), based on the control inputs. The selected input is then replicated at the output.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data selection in time-critical applications.
• Low power consumption contributes to energy efficiency.
• Wide operating voltage range allows for compatibility with various digital systems.
• Compact SOIC package facilitates easy integration into circuit designs.

Disadvantages

• Limited number of inputs and outputs may restrict its applicability in complex systems requiring more extensive routing capabilities.
• Propagation delay time may introduce timing constraints in certain applications.

Working Principles

The 74ACT157MTCX operates based on the principle of multiplexing. When the control inputs (S0 and S1) are set to a specific combination, the corresponding input line (A, B, C, or D) is connected to the output line (Y). The selected input signal is then transmitted through the IC, replicating it at the output.

Application Field Plans

The 74ACT157MTCX finds application in various digital systems where data selection and routing are required. Some potential application fields include: - Data communication systems - Digital audio/video equipment - Computer peripherals - Industrial automation systems - Automotive electronics

Alternative Models

For users seeking alternative options, the following models can be considered: - 74HC157: Similar functionality, but operates at a lower voltage range (2V to 6V). - CD4051: Analog multiplexer with similar pin configuration and characteristics. - SN74LS157: TTL logic level multiplexer with comparable specifications.

These alternative models provide similar functionality and can be suitable replacements depending on specific requirements.

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