NLV74VHC50DTR2G

Logic - Buffers, Drivers, Receivers, Transceivers

The NLV74VHC50DTR2G is a quadruple, actively balanced, high-speed differential line driver with a wide common-mode voltage range and an adjustable output current. It is designed for driving high-speed digital signals or low-impedance loads over long lines. It features an input threshold voltage of 1.4V and a propagation delay time of 1.3ns (TYP), accommodating a wide range of input frequencies. Additionally, it has a minimum voltage gain of 0.80V/V and a peak output current of ±100mA, providing high performance and fast signal transmission. Furthermore, the NLV74VHC50DTR2G has an adjustable output current, allowing users to tailor the differential output swing to the cable capacitance. Overall, it is the ideal driver for high-speed differential communication over long lines.

Application Field

The NLV74VHC50DTR2G is versatile differential driver commonly used in a range of applications. It is typically employed in/for high-speed serial link applications such as Thunderbolt, PCIe, Fibre Channel, USB, and HDMI; long-distance single-ended communication applications such as truck and trailer power-over-ether (PoE); low-impedance load/line drives such as digital-to-analog converters (DACs), pulse-width modulators (PWM), and power amplifiers, and; applications requiring RF frequency rejection such as communications and industrial automation.

Working Principle

The NLV74VHC50DTR2G is an actively-balanced differential line driver whose working principle can be divided into the following main elements: the input buffer, the active balancer, the current modulator, the output buffer and the current limiters.

The input buffer amplifies the input signal and sends it to the active balancer, which is an amplifier stage with very high input impedance. The active balancer inverts the signal and sends it to the current modulator, which controls the current flowing through the driver’s transistors based on the signal received from the balancer. The output buffer amplifies the signal again and sends it to the current limiters, which prevent the output current from exceeding a predefined limit, regardless of temperature or process variations.

The NLV74VHC50DTR2G also features an adjustable output current, allowing users to tailor the differential output swing based on the cable capacitance. This enables the driver to power VDDQ2 lines and provide improved signal transmission over longer cables.