Encyclopedia Entry: 74FCT257DTQG

Product Overview

Category

The 74FCT257DTQG 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 multiplexing applications in various electronic devices and systems.

Characteristics

• High-speed operation
• Low power consumption
• Wide operating voltage range
• Compatibility with TTL logic levels
• Four independent 2-input multiplexers in a single package

Package and Quantity

The 74FCT257DTQG is available in a standard 16-pin TSSOP (Thin Shrink Small Outline Package). It is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

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 (typical)
• Maximum Quiescent Current: 8 mA

Pin Configuration

The 74FCT257DTQG has a total of 16 pins, which are assigned specific functions as follows:

1. A0: Input A0
2. B0: Input B0
3. G1: Enable Input
4. Y0: Output Y0
5. A1: Input A1
6. B1: Input B1
7. G2: Enable Input
8. Y1: Output Y1
9. Y2: Output Y2
10. GND: Ground
11. Y3: Output Y3
12. B3: Input B3
13. A3: Input A3
14. G3: Enable Input
15. B2: Input B2
16. A2: Input A2

Functional Features

The 74FCT257DTQG is designed to provide four independent 2-input multiplexers in a single package. It allows the selection of one of the four data inputs (A0-A3, B0-B3) based on the control inputs (G1, G2, G3). The selected data is then routed to the corresponding output (Y0-Y3).

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing.
• Low power consumption helps conserve energy.
• Wide operating voltage range ensures compatibility with various systems.
• TTL logic level compatibility simplifies integration with existing circuits.

Disadvantages

• Limited number of input/output channels compared to larger multiplexer ICs.
• May require additional external components for certain applications.

Working Principles

The 74FCT257DTQG operates based on the principles of digital multiplexing. When the appropriate enable input (G1, G2, G3) is activated, the IC selects the desired data input (A0-A3, B0-B3) and forwards it to the corresponding output (Y0-Y3). This enables efficient routing and manipulation of data signals within electronic systems.

Application Field Plans

The 74FCT257DTQG finds application in various fields, including: 1. Data communication systems 2. Digital signal processing 3. Industrial automation 4. Consumer electronics 5. Automotive electronics

Alternative Models

For similar functionality, alternative models to the 74FCT257DTQG include: 1. SN74LS157N 2. CD4051BE 3. MC14051BCP 4. 74HC157D

These alternative models offer comparable features and can be used as substitutes depending on specific requirements.

In conclusion, the 74FCT257DTQG is a versatile integrated circuit that provides efficient data multiplexing capabilities. Its high-speed operation, low power consumption, and compatibility with TTL logic levels make it suitable for various applications in different fields.