Encyclopedia Entry: 74FCT157ATQG

Product Overview

Category

The 74FCT157ATQG belongs to the category of integrated circuits (ICs) and specifically falls under the family of digital multiplexers.

Use

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

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with various logic families
• Compact package size

Package and Quantity

The 74FCT157ATQG is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing a quantity of 250 units.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to Vcc
• Output Voltage Range: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 3.5 ns (max)
• Input Capacitance: 3 pF (typ)
• Output Capacitance: 6 pF (typ)

Pin Configuration

The 74FCT157ATQG has a total of 16 pins, each serving a specific function. The pin configuration is as follows:

+---+--+---+ A1 -|1 +--+ 16|- Vcc B1 -|2 |- B2 C1 -|3 |- C2 D1 -|4 |- D2 GND -|5 |- GND Y -|6 |- Y G1B -|7 |- G2B G1A -|8 |- G2A A -|9 |- B C -|10 |- D OE -|11 |- Y GND -|12 |- GND G3A -|13 |- G4A G3B -|14 |- G4B Y -|15 |- Vcc +----------+

Functional Features

The 74FCT157ATQG is a quad 2-input multiplexer with complementary outputs. It features four independent multiplexers, each capable of selecting one of two data inputs (A or B) based on the control inputs (G1 and G2). The selected output (Y) is then routed to the common output line.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data selection in time-critical applications.
• Low power consumption helps in reducing overall system energy requirements.
• Wide operating voltage range ensures compatibility with various power supply configurations.
• Compact package size enables space-saving integration within digital systems.

Disadvantages

• Limited number of input channels may restrict the complexity of data routing in certain applications.
• Lack of built-in protection features against electrical faults may require additional circuitry for robust operation.

Working Principles

The 74FCT157ATQG operates based on the principles of digital multiplexing. The control inputs (G1 and G2) determine which data inputs (A or B) are selected for routing to the output (Y). When the control inputs are set to specific logic levels, the corresponding data input is connected to the output line. The complementary outputs (Y and Y) provide an inverted version of the selected data.

Application Field Plans

The 74FCT157ATQG finds applications in various digital systems, including but not limited to: - Data communication equipment - Computer peripherals - Industrial control systems - Automotive electronics - Consumer electronics

Alternative Models

There are several alternative models available that offer similar functionality to the 74FCT157ATQG. Some notable alternatives include: - SN74ALS157A - CD74HCT157E - MC74HC157AN - 74ACT157SC

These alternative models can be considered based on specific application requirements and availability.

In conclusion, the 74FCT157ATQG is a versatile integrated circuit used for data selection and routing in digital systems. Its high-speed operation, low power consumption, and compact package make it suitable for various applications across different industries.