SN75LVDS31D

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The SN75LVDS31D is a 3.3-V single channel non-inverting differential line driver. This driver has been developed to satisfy the needs of many serial data communications systems that use LVDS technology such as Fibre Channel, FPD-Link, Gigabit Ethernet and other low-voltage, high-speed communications systems. It is an ideal solution for applications that require high-speed communications, low power consumption and low EMI.

The SN75LVDS31D is a differential line driver that consists of a pair of low-voltage differential signal (LVDS) line drivers operating from a single 3.3-V supply or dual supplies. This device converts single-ended logic into a differential output that is immune to noise. It supports data rates up to 800 Mbps. The enable/disable and voltage control features enable the user to regulate the output voltage, making this device well-suited for low-voltage power-saving applications.

The SN75LVDS31D is the perfect choice for applications that require long cable applications, since its small package size allows for easier routing in tight spaces. This makes it an ideal solution for space-constrained applications such as automotive and commercial communication systems. It features selectable termination resistors to reduce system reflections and cable related electromagnetic noise.

The SN75LVDS31D is available in a tiny 9 pin SOTAsmall-outline package (SOIC-9) and is optimized for signal channels of high data rate up to 800 Mbps. The SN75LVDS31D device is RoHS-compliant package, and is guaranteed to meet all applicable safety requirements including UL, CSA, and TUV.

Working Principle

The SN75LVDS31D\'s differential line drivers consist of an input voltage differential stage, an output FET driver, an open-drain enable input circuit, and an output voltage differential stage. When an input signal is applied to the driver, the output voltage is created by the differential output FET driver. The output FET driver\'s output voltage is controlled by the output stage of the device, which is regulated by a voltage reference circuit. The voltage reference circuit is also used to control the output voltage of the driver. The output voltage of the driver is determined by the open-drain enable circuit, which is responsible for switching between high and low voltage levels. In addition, the output voltage can be regulated by the output stage, which can be programmed to regulate the output voltage from 0.7V to 3.3V.

The SN75LVDS31D supports data rates up to 800 Mbps. The maximum clock frequency is determined by the rise/fall times, the load capacitance and the driver’s output swing. The maximum clock frequency is also limited by the switching time of the drivers, which is typically 200ns. The drivers also offer built-in EMI reduction features, such as differential termination, slew-rate control, and adjustable driver output impedance, that reduce EMI noise generated by the driver.

In addition, the SN75LVDS31D features an on-chip thermal shutdown circuit that prevents the device from overheating. It also includes a power-on reset circuitry to ensure reliable power-on operations. The SN75LVDS31D is available in an SO-9 package, which makes it ideal for space-constrained applications.

Application Field

The SN75LVDS31D is well-suited for applications in the communications and computer industries such as audio and video data streaming, Fibre Channel, FPD-Link, Gigabit Ethernet, and other low-voltage, high-speed communications systems. It is ideal for applications that require long cables and small package size for easier routing in tight spaces. In addition, this driver is useful for applications with large load capacitances, such as LCD display and imaging, that require wide output voltage swing range to drive small signals.

The SN75LVDS31D is also suitable for automotive applications, providing an ideal solution for integrated diagnostic systems, infotainment networks and intelligent power management systems, where system cost and reliability are paramount. With its integrated thermal shutdown circuit, the SN75LVDS31D is also suitable for demanding power-constrained applications, such as telecommunications and automotive equipment.

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