Encyclopedia Entry: 74ACT157SCX

Product Overview

Category

The 74ACT157SCX belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital multiplexers.

Use

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

Characteristics

• High-speed operation: The 74ACT157SCX is designed to operate at high clock frequencies, making it suitable for applications requiring fast data switching.
• Low power consumption: This IC is optimized for low 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 74ACT157SCX is compatible with both TTL (Transistor-Transistor Logic) and CMOS (Complementary Metal-Oxide-Semiconductor) logic levels.

Package and Quantity

The 74ACT157SCX is available in a small outline package (SOIC) with 16 pins. It is commonly sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to Vcc
• Output Voltage Range: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C
• Maximum Clock Frequency: 100 MHz
• Propagation Delay: 5 ns (typical)

Pin Configuration

The pin configuration of the 74ACT157SCX is as follows:

+---+--+---+ A1 -|1 +--+ 16|- Vcc B1 -|2 15|- Y C1 -|3 14|- B D1 -|4 13|- A C2 -|5 74ACT157SCX 12|- GND B2 -|6 11|- C A2 -|7 10|- D G1B -|8 9|- G2B +-----------+

Functional Features

The 74ACT157SCX is a quad 2-input multiplexer with common select inputs (A and B) and individual data inputs (C and D). It features a strobe input (G1B) and an output enable input (G2B) for enhanced control.

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data routing in time-critical applications. - Low power consumption contributes to energy efficiency. - Wide operating voltage range provides flexibility in various electronic systems. - Compatibility with TTL and CMOS logic levels ensures easy integration into existing designs.

Disadvantages: - Limited number of inputs may restrict its use in complex systems requiring more input options. - Propagation delay of 5 ns may introduce slight latency in certain applications.

Working Principles

The 74ACT157SCX operates based on the principle of digital multiplexing. It uses the select inputs (A and B) to determine which data inputs (C or D) are routed to the output (Y). The strobe input (G1B) and output enable input (G2B) control the timing and activation of the multiplexer.

Application Field Plans

The 74ACT157SCX finds applications in various fields, including: 1. Data communication systems 2. Digital signal processing 3. Multiplexed data transmission 4. Memory address decoding 5. Control circuitry

Alternative Models

Alternative models that can be considered as alternatives to the 74ACT157SCX include: - 74HC157: A similar quad 2-input multiplexer with a wider supply voltage range. - CD4051: An 8-channel analog multiplexer/demultiplexer suitable for both digital and analog signals.

In conclusion, the 74ACT157SCX is a versatile integrated circuit used for data selection and routing in digital systems. Its high-speed operation, low power consumption, and compatibility make it a popular choice in various applications.