SN74AHCT126NSR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Buffer/Driver
• Characteristics: High-speed, CMOS logic level shifting
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Quad bus buffer gate with 3-state outputs
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Voltage: VCC - 0.5V
• Low-Level Output Voltage: 0.1V
• Maximum Operating Frequency: 50MHz

Detailed Pin Configuration

The SN74AHCT126NSR has a total of 14 pins, which are labeled as follows:

1. 1A - Input 1 for Gate A
2. 1Y - Output 1 for Gate A
3. 2A - Input 2 for Gate A
4. 2Y - Output 2 for Gate A
5. GND - Ground
6. 3Y - Output 3 for Gate A
7. 3A - Input 3 for Gate A
8. 4Y - Output 4 for Gate A
9. 4A - Input 4 for Gate A
10. OE - Output Enable
11. VCC - Power Supply
12. NC - No Connection
13. 4B - Input 4 for Gate B
14. 4Y - Output 4 for Gate B

Functional Features

• Quad buffer gate with 3-state outputs
• High-speed operation
• CMOS logic level shifting
• Output enable for easy control of output states
• Wide supply voltage range for compatibility with various systems

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data transfer - CMOS technology provides low power consumption - 3-state outputs allow for flexible bus sharing

Disadvantages: - Limited maximum operating frequency compared to some other ICs - Requires external control for output enable functionality

Working Principles

The SN74AHCT126NSR is a quad buffer gate that operates using CMOS technology. It is designed to provide high-speed logic level shifting and buffering capabilities. The inputs (1A, 2A, 3A, 4A) are compatible with both TTL and CMOS voltage levels. The outputs (1Y, 2Y, 3Y, 4Y) can be put into a high-impedance state using the output enable (OE) pin.

When the OE pin is low, the outputs are enabled and follow the input signals. When the OE pin is high, the outputs are in a high-impedance state, effectively disconnecting them from the rest of the circuit. This feature allows for easy bus sharing and prevents conflicts between multiple devices connected to the same bus.

Detailed Application Field Plans

The SN74AHCT126NSR is commonly used in various applications, including:

1. Data communication systems: It can be used as a buffer to ensure reliable data transmission between different components of a system.
2. Microcontroller interfacing: It helps interface microcontrollers with other devices by providing logic level shifting and buffering capabilities.
3. Memory systems: It can be used to drive address or data lines in memory systems, ensuring proper signal integrity.
4. Industrial automation: It finds applications in industrial control systems, where it helps interface different components and devices.

Detailed and Complete Alternative Models

1. SN74AHCT125NSR: Similar to SN74AHCT126NSR but with 3-state outputs on all four gates.
2. SN74AHCT244NSR: Octal buffer/line driver with 3-state outputs.
3. SN74AHCT541NSR: Octal buffer/line driver with 3-state outputs and non-inverting functionality.

These alternative models offer similar functionality and can be used as substitutes for the SN74AHCT126NSR depending on specific requirements.

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