SN74AHCT138D

Product Overview

Category

SN74AHCT138D belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used as a 3-to-8 line decoder/demultiplexer.

Characteristics

• High-speed CMOS technology
• Low power consumption
• Wide operating voltage range: 2V to 5.5V
• Schmitt-trigger inputs for noise immunity
• Balanced propagation delays
• Multiple package options available

Package and Quantity

SN74AHCT138D is typically available in a 16-pin SOIC (Small Outline Integrated Circuit) package. It is sold in quantities of one unit or more, depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay: 12 ns
• Maximum Quiescent Current: 4 μA

Pin Configuration

The pin configuration of SN74AHCT138D is as follows:

+---+--+---+ A0 --|1 +--+ 16|-- VCC A1 --|2 15|-- Y7 A2 --|3 14|-- Y6 GND --|4 13|-- Y5 Y0 --|5 12|-- Y4 Y1 --|6 11|-- Y3 Y2 --|7 10|-- Y2 /E1 --|8 9|-- /E2 +----------+

Functional Features

SN74AHCT138D is designed to decode three binary inputs (A0, A1, and A2) into eight mutually exclusive outputs (Y0 to Y7). It can be used as a demultiplexer to route a single input signal to one of the eight output lines based on the binary input combination.

Advantages

• High-speed operation allows for efficient data processing.
• Low power consumption makes it suitable for battery-powered devices.
• Schmitt-trigger inputs provide noise immunity, ensuring reliable operation in noisy environments.
• Wide operating voltage range allows compatibility with various systems.

Disadvantages

• Limited number of input lines (3) and output lines (8).
• May not be suitable for applications requiring more complex decoding functionality.

Working Principles

SN74AHCT138D utilizes CMOS technology to perform the decoding function. The binary inputs (A0, A1, and A2) are decoded internally, and the corresponding output line is activated based on the input combination. The selected output line is driven to a logic high level, while the remaining output lines remain at a logic low level.

Application Field Plans

SN74AHCT138D finds applications in various fields, including: - Address decoding in microcontrollers and microprocessors - Memory selection in digital systems - Data routing in communication systems - Control signal generation in industrial automation

Alternative Models

Some alternative models that offer similar functionality to SN74AHCT138D include: - 74HC138 - CD74HC138 - MC74HC138 - DM74LS138

These models may have slight variations in specifications and package options, but they serve the same purpose of decoding multiple inputs into multiple outputs.

In conclusion, SN74AHCT138D is a versatile integrated circuit that provides efficient decoding functionality. Its high-speed operation, low power consumption, and wide voltage range make it suitable for various applications in different industries.