MC74HC126ADG

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate Buffer/Driver
• Characteristics: High-Speed CMOS, Quad Bus Buffer with 3-State Outputs
• Package: SOIC-14
• Essence: The MC74HC126ADG is a quad bus buffer with 3-state outputs, designed for high-speed CMOS applications.
• Packaging/Quantity: The MC74HC126ADG is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2V to 6V
• Logic Family: HC
• Number of Channels: 4
• Output Type: 3-State
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC74HC126ADG has a total of 14 pins, arranged as follows:

__ __ 1 |1 \__/ 14| VCC 2 |2 13| A 3 |3 12| B 4 |4 11| C 5 |5 MC 10| D 6 |6 74 9| OE 7 |7 HC 8| GND |________|

Functional Features

• Quad 3-State Non-Inverting Buffer
• High-Speed Operation
• Buffered Inputs
• 3-State Outputs for Bus-Oriented Applications
• Output Enable Control

Advantages and Disadvantages

Advantages

• High-speed operation suitable for CMOS applications
• Buffered inputs improve signal integrity
• 3-state outputs allow for bus-oriented applications
• Output enable control provides flexibility in controlling the outputs

Disadvantages

• Limited supply voltage range (2V to 6V)
• Propagation delay of 9 ns may not be suitable for ultra-high-speed applications

Working Principles

The MC74HC126ADG is a quad bus buffer with 3-state outputs. It operates on a supply voltage ranging from 2V to 6V and belongs to the HC logic family. The inputs are buffered, ensuring signal integrity, and the outputs can be put into a high-impedance state using the output enable (OE) pin.

When the OE pin is low, the outputs are active and reflect the input signals. When the OE pin is high, the outputs are in a high-impedance state, allowing other devices to drive the bus lines without interference.

Detailed Application Field Plans

The MC74HC126ADG is commonly used in various applications that require buffering and driving of digital signals. Some potential application fields include:

1. Microcontroller interfacing: The IC can be used to interface microcontrollers with external devices, providing signal buffering and driving capabilities.
2. Data communication systems: The MC74HC126ADG can be employed in data communication systems to buffer and drive signals between different components.
3. Memory systems: It can be utilized in memory systems to ensure proper signal transmission between memory modules and other components.
4. Industrial automation: The IC can find applications in industrial automation systems where it is necessary to buffer and drive signals for control and monitoring purposes.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the MC74HC126ADG include:

1. SN74HC126N by Texas Instruments
2. CD74HC126E by Texas Instruments
3. 74HC126D by NXP Semiconductors
4. TC74HC126AF by Toshiba

These alternative models provide comparable features and can be used as substitutes for the MC74HC126ADG in various applications.

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