MM74HC126N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate Buffer/Driver
• Characteristics: High-Speed, Quad 3-State Non-Inverting Buffer/Driver
• Package: DIP (Dual In-Line Package)
• Essence: The MM74HC126N is a logic gate buffer/driver that provides high-speed signal amplification and buffering capabilities. It is designed to interface between different logic families or to drive high-capacitance loads.
• Packaging/Quantity: The MM74HC126N is typically packaged in tubes or trays and is available in various quantities.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to Vcc
• Output Voltage: 0V to Vcc
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9 ns (typical)
• Output Current: ±25 mA

Pin Configuration

The MM74HC126N has a 14-pin DIP package with the following pin configuration:

__ __ OE1 |1 `--' 14| Vcc A1 |2 13| B1 Y1 |3 12| A2 Y2 |4 11| B2 B3 |5 10| Y3 A3 |6 9| Y4 B4 |7 8| OE2 ````````

Functional Features

• Quad 3-state non-inverting buffer/driver
• High-speed operation
• Wide operating voltage range
• 3-state outputs for bus-oriented applications
• Output current limiting protection
• Schmitt-trigger input for noise immunity

Advantages and Disadvantages

Advantages

• High-speed operation allows for efficient signal amplification and buffering.
• Wide operating voltage range makes it compatible with various logic families.
• 3-state outputs enable bus-oriented applications, providing flexibility in system design.
• Output current limiting protection prevents damage to the IC and connected devices.
• Schmitt-trigger input ensures reliable operation in noisy environments.

Disadvantages

• Limited output current may not be suitable for driving high-capacitance loads.
• DIP package may not be ideal for space-constrained applications.
• Requires external pull-up resistors for proper operation in some cases.

Working Principles

The MM74HC126N operates based on CMOS (Complementary Metal-Oxide-Semiconductor) technology. It consists of four independent non-inverting buffer/driver circuits. The inputs are equipped with Schmitt-trigger circuitry, which provides hysteresis and improves noise immunity. The 3-state outputs allow multiple devices to share a common bus without interfering with each other.

Detailed Application Field Plans

The MM74HC126N is commonly used in various digital systems and electronic devices. Some typical application fields include:

1. Microcontroller interfacing: The MM74HC126N can be used to interface microcontrollers with different logic families or drive external devices.
2. Bus drivers: It is suitable for driving buses in computer systems, allowing multiple devices to communicate efficiently.
3. Level shifting: The MM74HC126N can be used to shift logic levels between different voltage domains, enabling compatibility between incompatible systems.
4. Signal amplification: It can amplify weak signals from sensors or other low-power sources, ensuring reliable signal transmission.

Detailed and Complete Alternative Models

• SN74HC126N
• CD74HC126E
• MC74HC126AN
• 74HC126D

These alternative models offer similar functionality and can be used as replacements for the MM74HC126N in various applications.

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