Encyclopedia Entry: 74VHCT125BQ,115

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Level Shifter
• Characteristics: High-Speed, Low-Power, Quad Buffer/Line Driver
• Package: SOIC-14
• Essence: The 74VHCT125BQ,115 is a logic level shifter IC that provides four buffer/line driver channels. It is designed to shift logic levels between different voltage domains, enabling seamless communication between devices operating at different voltage levels.
• Packaging/Quantity: The 74VHCT125BQ,115 is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Logic Family: VHCT
• Number of Channels: 4
• Input Voltage Levels: Compatible with both TTL and CMOS logic levels
• Output Drive Capability: 8mA at 5V
• Propagation Delay: 6ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The 74VHCT125BQ,115 IC has a total of 14 pins, which are assigned as follows:

| Pin No. | Pin Name | Description | |---------|----------|-------------| | 1 | OE | Output Enable | | 2 | Y1 | Output 1 | | 3 | A1 | Input 1 | | 4 | GND | Ground | | 5 | A2 | Input 2 | | 6 | Y2 | Output 2 | | 7 | VCC | Power Supply | | 8 | Y3 | Output 3 | | 9 | A3 | Input 3 | | 10 | GND | Ground | | 11 | A4 | Input 4 | | 12 | Y4 | Output 4 | | 13 | NC | Not Connected| | 14 | VCC | Power Supply |

Functional Features

• Provides bidirectional voltage level shifting between TTL and CMOS logic levels.
• Enables communication between devices operating at different voltage domains.
• High-speed operation with low propagation delay.
• Low-power consumption, making it suitable for battery-powered applications.
• Four independent buffer/line driver channels for versatile use.

Advantages

• Wide supply voltage range allows compatibility with various systems.
• Supports both TTL and CMOS logic levels, enhancing versatility.
• Compact SOIC-14 package offers space-saving integration.
• High-speed operation ensures efficient data transfer.
• Low-power consumption prolongs battery life in portable devices.

Disadvantages

• Limited number of channels may not be sufficient for complex systems requiring multiple level shifting functions.
• Propagation delay may introduce timing issues in certain high-frequency applications.

Working Principles

The 74VHCT125BQ,115 operates by receiving input signals from one voltage domain and translating them to the corresponding logic levels of another voltage domain. It utilizes a combination of transistors and resistors to achieve bidirectional level shifting while maintaining signal integrity and minimizing power consumption.

Detailed Application Field Plans

The 74VHCT125BQ,115 is commonly used in various applications where logic level translation is required. Some typical application fields include: - Interfacing between microcontrollers operating at different voltage levels. - Communication between sensors and microprocessors with varying logic levels. - Level shifting in data communication interfaces such as UART, SPI, and I2C. - Signal conditioning in mixed-voltage systems.

Detailed Alternative Models

• 74HCT125: Similar to the 74VHCT125BQ,115 but operates at a higher supply voltage range (4.5V to 5.5V).
• 74LV125: Low-voltage version of the 74VHCT125BQ,115, designed for operation at lower supply voltages (1.65V to 3.6V).
• SN74LVC125A: Another logic level shifter IC with similar functionality, offered by Texas Instruments.

Note: The alternative models mentioned above are just a few examples, and there are several other options available in the market.

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