CD74ACT238E

Product Overview

• Category: Integrated Circuit
• Use: Digital Multiplexer/Demultiplexer
• Characteristics: High-Speed, Low-Power, 3-to-8 Line Configuration
• Package: DIP (Dual In-line Package)
• Essence: CD74ACT238E is a digital multiplexer/demultiplexer integrated circuit that allows for the selection of one out of eight data inputs and routes it to a single output line.
• Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

• Logic Family: ACT
• Number of Inputs: 3
• Number of Outputs: 8
• Supply Voltage: 2V - 6V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 5.5 ns (typical)
• Output Drive Capability: ±24 mA
• Power Dissipation: 500 mW (max)

Pin Configuration

The CD74ACT238E has a 16-pin dual in-line package (DIP). The pin configuration is as follows:

+---+--+---+ A0 --|1 +--+ 16|-- VCC A1 --|2 15|-- Y A2 --|3 14|-- G2 /G1 --|4 13|-- G1 /G2 --|5 12|-- A2 E1 --|6 11|-- A1 E2 --|7 10|-- A0 /Y0 --|8 9|-- /Y7 +----------+

Functional Features

• CD74ACT238E is designed to be used as a digital multiplexer or demultiplexer.
• It has three select inputs (A0, A1, and A2) that allow the user to choose one of the eight data inputs to be routed to the output line (Y).
• The enable inputs (/G1 and /G2) control the operation of the device.
• The CD74ACT238E operates at high speed and low power consumption, making it suitable for various applications.

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient data routing.
• Low-power consumption helps in reducing overall system energy requirements.
• Wide operating voltage range (2V - 6V) provides flexibility in different applications.
• Output drive capability of ±24 mA enables direct connection to other devices without additional buffering.

Disadvantages

• Limited number of inputs and outputs may restrict its use in complex systems requiring more connections.
• Propagation delay of 5.5 ns (typical) may introduce slight delays in time-critical applications.

Working Principles

The CD74ACT238E operates based on the principles of digital multiplexing and demultiplexing. When the enable inputs (/G1 and /G2) are active, the select inputs (A0, A1, and A2) determine which of the eight data inputs is connected to the output line (Y). The selected input is then transmitted to the output with minimal delay.

Detailed Application Field Plans

CD74ACT238E finds applications in various fields where digital multiplexing or demultiplexing is required. Some common application areas include:

1. Data communication systems
2. Telecommunication equipment
3. Industrial automation
4. Instrumentation and measurement devices
5. Consumer electronics

Detailed and Complete Alternative Models

There are several alternative models available in the market that offer similar functionality to CD74ACT238E. Some popular alternatives include:

1. 74HC238: High-Speed CMOS Logic
2. CD4051B: Analog Multiplexer/Demultiplexer
3. SN74LS151: TTL Logic Multiplexer

These alternative models can be considered based on specific requirements and compatibility with the existing system.

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