Encyclopedia Entry: 74VHC126BQ-Q100X

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate Buffer/Driver
• Characteristics: High-Speed, Low-Power, Quad Bus Buffer with 3-State Outputs
• Package: BQFN (Quad Flat No-Lead) Package
• Essence: Buffering and driving signals in digital circuits
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay Time: 4.5ns (typical)
• Output Current: ±8mA (maximum)

Detailed Pin Configuration

The 74VHC126BQ-Q100X IC has a total of 14 pins, which are assigned specific functions as follows:

1. Pin 1: Output Enable (OE) - Active LOW enable input for all four buffers
2. Pin 2: Input A1 - Input for buffer 1
3. Pin 3: Output Y1 - Output for buffer 1
4. Pin 4: GND - Ground reference
5. Pin 5: Output Y2 - Output for buffer 2
6. Pin 6: Input A2 - Input for buffer 2
7. Pin 7: VCC - Positive power supply
8. Pin 8: Output Y3 - Output for buffer 3
9. Pin 9: Input A3 - Input for buffer 3
10. Pin 10: Output Y4 - Output for buffer 4
11. Pin 11: Input A4 - Input for buffer 4
12. Pin 12: NC - No connection
13. Pin 13: GND - Ground reference
14. Pin 14: Output Enable (OE) - Active LOW enable input for all four buffers

Functional Features

• High-Speed Operation: The 74VHC126BQ-Q100X offers fast propagation delay times, making it suitable for high-speed digital circuits.
• Low Power Consumption: This IC is designed to operate at low power levels, reducing energy consumption in electronic systems.
• Quad Buffer with 3-State Outputs: It provides four independent buffer channels, each with a 3-state output, allowing multiple signal buffering and driving capabilities.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient signal buffering in fast digital circuits. - Low power consumption contributes to energy-efficient designs. - Quad buffer configuration allows for versatile signal buffering and driving applications.

Disadvantages: - Limited output current capacity may restrict its use in certain high-current applications. - The package size (BQFN) may require specialized equipment for soldering and handling.

Working Principles

The 74VHC126BQ-Q100X operates as a buffer/driver by receiving input signals and amplifying them to drive output loads. When the Output Enable (OE) pin is active LOW, the outputs are enabled and reflect the input signals. Conversely, when OE is inactive HIGH, the outputs enter a high-impedance state, effectively disconnecting them from the circuit.

Detailed Application Field Plans

The 74VHC126BQ-Q100X finds applications in various fields, including: 1. Microcontrollers and Digital Processors: Signal buffering between microcontrollers and peripheral devices. 2. Communication Systems: Buffering and driving signals in data transmission and reception circuits. 3. Industrial Automation: Interface buffering in control systems and PLCs. 4. Automotive Electronics: Signal conditioning and driving in automotive control modules. 5. Consumer Electronics: Buffering and driving signals in audio/video systems, gaming consoles, etc.

Detailed and Complete Alternative Models

1. 74VHC125BQ-Q100X: Similar to 74VHC126BQ-Q100X but with tri-state outputs instead of 3-state outputs.
2. 74AHC126BQ-Q100X: A variant with similar functionality but operates at a wider supply voltage range (2.0V to 6.0V).
3. 74LVCH126BQ-Q100X: Low-voltage version with similar characteristics but designed for operation at 1.65V to 3.6V.

(Note: The above alternative models are just a few examples; there are several other alternatives available in the market.)

In conclusion, the 74VHC126BQ-Q100X is a high-speed, low-power quad bus buffer IC that finds applications in various digital circuits. Its versatile features, compact package, and availability of alternative models make it a popular choice among designers seeking efficient signal buffering and driving solutions.