CD74AC138M

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CD74AC138M

IC DECODER/DEMUX 1 X 3:8 16-SOIC

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Spezifikationen

Series 74AC
Part Status Obsolete
Base Product Number 74AC138
Type Decoder/Demultiplexer
Circuit 1 x 3:8
Independent Circuits 1
Current - Output High, Low 24mA, 24mA
Voltage Supply Source Single Supply
Voltage - Supply 1.5V ~ 5.5V
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount
Package / Case 16-SOIC (0.154", 3.90mm Width)
Supplier Device Package 16-SOIC

Übersicht

Description

The CD74AC138M is a high-speed, low-power 3-to-8 line decoder/demultiplexer. It is part of the CD74AC family of devices, designed for use in digital circuits where binary inputs are converted into a single active output. This IC features three binary inputs and eight outputs, with only one output activated (low) at any time based on the binary input combination.
Key features include:
- Wide operating voltage range (2V to 6V)
- Fast switching speeds (up to 5ns at 5V)
- Low power consumption
- Active low outputs
The CD74AC138M also includes enable pins, allowing for greater control over the outputs and added functionality in larger systems. It is commonly used in applications such as memory address decoding, data routing, and signal demultiplexing. The device comes in various package types, including the surface-mount SOIC and DIP formats, making it suitable for various electronic designs. Overall, it is a versatile and efficient component in digital logic applications.

Features

The CD74AC138M is a high-speed, low-power 3-to-8 line decoder/demultiplexer. Key features include:
1. Functionality: It decodes 3 binary inputs into one of eight active low outputs.
2. High Speed: Operates with a maximum propagation delay of around 5 ns at Vcc = 5V.
3. Low Power: Consumes less power compared to standard CMOS devices.
4. Wide Supply Voltage Range: Operates with a supply voltage of 2V to 6V.
5. TTL Compatibility: Compatible with standard TTL logic levels.
6. Enable Inputs: Features enable inputs to control the decoder's activity.
7. Temperature Range: Designed to operate over a temperature range of -40°C to +85°C.
8. Package: Available in a 16-pin SOIC package, suitable for surface mounting.
These attributes make the CD74AC138M suitable for various digital applications, including data routing and signal demultiplexing.

Package

The CD74AC138M is typically packaged in a 16-pin plastic dual in-line package (DIP) configuration.

Pinout

The CD74AC138M is a 3-to-8 line decoder/demultiplexer with a total of 16 pins. Its primary function is to decode a 3-bit binary input into one of the eight active low outputs. The pin configuration is as follows:
1. A0 (Input): Least significant input bit.
2. A1 (Input): Middle input bit.
3. A2 (Input): Most significant input bit.
4. G1 (Input): Active high enable input.
5. G2A (Input): Active low enable input.
6. G2B (Input): Active low enable input.
7. Y0 to Y7 (Outputs): Eight active low outputs corresponding to the binary value of A0, A1, and A2.
8. Vcc: Power supply pin.
9. GND: Ground pin.
The device is commonly used in digital circuits for address decoding, data routing, and other logic applications, providing a simple method to select one of multiple outputs based on the binary input.

Manufacturer

The CD74AC138M is manufactured by Texas Instruments, a leading global semiconductor company. Texas Instruments (TI) specializes in designing and producing a wide range of electronic components, including analog and digital semiconductors, microcontrollers, and embedded processors. The company is known for its innovative technology solutions used in various applications such as automotive, industrial, consumer electronics, and communication systems. Founded in 1930, TI has established itself as a prominent player in the electronics industry, focusing on research and development to drive advancements in semiconductor technology.

Application

The CD74AC138M is a 3-to-8 line decoder/demultiplexer used in various applications including memory address decoding, data routing in digital circuits, and multiplexing. It is commonly employed in microprocessor interfacing, signal decoding in communication systems, and as a control element in digital logic circuits. Its high-speed performance and low power consumption make it suitable for embedded systems and various consumer electronics.

Equivalent

The CD74AC138M is a 3-to-8 line decoder/demultiplexer. Equivalent products include:
1. 74HC138
2. 74HCT138
3. 74LS138
These chips serve similar functions but may vary in terms of supply voltage and speed. Always check datasheets for specific electrical characteristics and pin configurations before substitution.

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