CD74HC238E

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CD74HC238E

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IC DECODER/DEMUX 1X3:8 16DIP

  • メーカーSTマイクロエレクトロニクス

  • メーカー品番 #CD74HC238E

  • パッケージ 16-DIP (0.300, 7.62mm)

  • 在庫状況3940

365 日間品質保証

7*24 日間の品質保証

90-時間単位のサービス保証

1日間のアフターサービス保証

仕様

属性
Package Tube
Series 74HC
ProductStatus Active
Type Decoder/Demultiplexer
Circuit 1 x 3:8
IndependentCircuits 1
Current-OutputHighLow 5.2mA, 5.2mA
VoltageSupplySource Single Supply
Voltage-Supply 2V ~ 6V
OperatingTemperature -55°C ~ 125°C
MountingType Through Hole
Package/Case 16-DIP (0.300, 7.62mm)

概要

Description

The CD74HC238E is a high-speed CMOS 3-to-8 line decoder/demultiplexer. It is designed for use in high-speed memory address decoding or data routing applications. The device features three binary select inputs (A, B, C), enabling users to select one of eight outputs (Y0 to Y7) to be active at any given time. When enabled, the output corresponding to the binary input address is driven to a low logic level, while all other outputs remain at a high logic level.
Key features include low power consumption due to CMOS technology, high noise immunity, and compatibility with TTL logic levels. The CD74HC238E operates over a wide voltage range, typically from 2V to 6V, making it suitable for various applications. It also includes three enable inputs (G1, G2A, G2B) to control the device operation, offering additional flexibility in system designs. Common applications for the CD74HC238E include data multiplexers, memory address decoding, and other logic-level operations requiring selective routing.

Equivalent

The CD74HC238E is a high-speed CMOS 3-to-8 line decoder/demultiplexer. Equivalent products include:
1. SN74HC238N from Texas Instruments
2. MC74HC238 from ON Semiconductor
3. 74HC238 from NXP Semiconductors
4. MM74HC238 from Fairchild Semiconductor (now part of ON Semiconductor)
These alternatives offer similar functionality and performance, making them suitable substitutes in most applications. Always verify pin compatibility and electrical specifications in the datasheets before use.

Features

The CD74HC238E is a high-speed CMOS 3-to-8 line decoder/demultiplexer. Key features include:
1. High-Speed Operation: Operates with a typical propagation delay of 15 ns at 5V.
2. Low Power Consumption: Consumes minimal power due to CMOS technology.
3. Wide Voltage Range: Operates within a voltage range of 2V to 6V.
4. Output Capability: Provides high current drive output capability.
5. Multiple Outputs: Features 8 active-high outputs.
6. Enable Inputs: Includes three enable inputs for expansion and cascading.
7. Noise Immunity: Offers high noise immunity with TTL compatibility.
8. Pin Compatibility: Compatible with LS-TTL devices.
9. Temperature Range: Functions effectively in a wide temperature range.
These features make the CD74HC238E suitable for use in digital circuits where decoding multiple lines or demultiplexing is necessary.

Pinout

The CD74HC238E is a 3-to-8 line decoder/demultiplexer integrated circuit. It has a total of 16 pins. The primary function of this IC is to decode a 3-bit binary input into one of eight outputs. The pin configuration is as follows:
- Pins 1-3: A0, A1, A2 - These are the address input pins. These pins receive the 3-bit binary code.
- Pin 4: G2A - Active-Low Enable Input.
- Pin 5: Y3 - Output.
- Pin 6: Y2 - Output.
- Pin 7: Y1 - Output.
- Pin 8: GND - Ground Pin.
- Pin 9: Y0 - Output.
- Pin 10: Y7 - Output.
- Pin 11: Y6 - Output.
- Pin 12: Y5 - Output.
- Pin 13: Y4 - Output.
- Pin 14: G2B - Active-Low Enable Input.
- Pin 15: G1 - Active-High Enable Input.
- Pin 16: VCC - Supply Voltage Pin.
The IC requires the enable pins to be set correctly to function; either G2A or G2B should be low, and G1 should be high for the decoder to be enabled.

Manufacturer

The CD74HC238E is manufactured by Texas Instruments. Texas Instruments (TI) is an American technology company that designs and manufactures semiconductors and various integrated circuits. It is one of the largest semiconductor companies in the world and is known for its development of analog chips and embedded processors, which are widely used in electronic devices and systems. TI serves a broad range of industries, including automotive, industrial, personal electronics, communications equipment, and enterprise systems. The company is headquartered in Dallas, Texas, and has a global presence with operations and facilities around the world.

Application

The CD74HC238E is a high-speed CMOS 3-to-8 line decoder/demultiplexer. Its application areas include memory address decoding in microprocessor systems, data routing in communication systems, and control signal demultiplexing in electronic circuits. It is also used in digital signal processing for expanding I/O lines, enabling the selection of multiple peripheral devices, and implementing logic functions. The device is suitable for applications requiring low power consumption and high noise immunity, commonly found in consumer electronics, automotive systems, and industrial automation.

Package

The CD74HC238E is a 3-to-8 line decoder/demultiplexer IC available in a 16-pin dual in-line package (DIP).

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