MC74HCT138ADTR2G

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: TSSOP-16
• Essence: The MC74HCT138ADTR2G is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is designed to be used in various digital applications where decoding and demultiplexing functions are required.
• Packaging/Quantity: The MC74HCT138ADTR2G is available in tape and reel packaging with 2500 units per reel.

Specifications

• Logic Family: HCT
• Number of Inputs: 3
• Number of Outputs: 8
• Supply Voltage: 2V to 6V
• Propagation Delay: 13 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC74HCT138ADTR2G has a TSSOP-16 package with the following pin configuration:

+---+--+---+ A2 |1 +--+ 16| Vcc A1 |2 15| Y0 A0 |3 14| Y1 /E1 |4 13| Y2 /E2 |5 74HCT 12| Y3 Y7 |6 138A 11| GND Y6 |7 DTR2G 10| A3 Y5 |8 9| A2 +----------+

Functional Features

• Converts a 3-bit binary input to one of the eight corresponding output lines.
• Active LOW enable inputs (/E1 and /E2) allow easy expansion by cascading multiple ICs.
• High-speed operation with minimal propagation delay.

Advantages

• Compact TSSOP-16 package allows for space-efficient PCB design.
• Wide supply voltage range enables compatibility with various digital systems.
• Low power consumption due to CMOS technology.
• Easy integration into existing digital circuits.

Disadvantages

• Limited number of input bits (3) restricts the range of possible input combinations.
• Propagation delay may affect timing-sensitive applications.

Working Principles

The MC74HCT138ADTR2G operates based on the principle of binary decoding. The three input pins (A0, A1, and A2) represent a 3-bit binary code. Depending on the input combination, one of the eight output pins (Y0 to Y7) is activated. The active LOW enable inputs (/E1 and /E2) control the operation of the decoder/demultiplexer.

Application Field Plans

The MC74HCT138ADTR2G finds applications in various digital systems, including:

1. Address decoding in microprocessors and memory devices.
2. Data routing and selection in multiplexers.
3. Control signal generation in digital circuits.
4. Signal demultiplexing in communication systems.
5. Logic circuitry in industrial automation.

Alternative Models

1. SN74LS138N: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
2. CD74HC238E: 3-to-8 line decoder/demultiplexer IC from Texas Instruments with different package options.
3. 74HC138: 3-to-8 line decoder/demultiplexer IC from NXP Semiconductors.

These alternative models offer similar functionality and can be used as substitutes for the MC74HCT138ADTR2G in various applications.

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