SN74AVCA406DGGRG4

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The SN74AVCA406DGGRG4 is a logic device that falls under two key categories: translators and level shifters. It is manufactured by Texas Instruments and can be used in a variety of applications. The SN74AVCA406DGGRG4 is an active differential signal re-driver with integrated termination that is designed to support high-speed data transfer with Signal Integrity (SI) and edge rate control. It can support data rates up to 16 Gbps and is suitable for both hot plugging and loopback operations. The device also supports 8.5V CMOS and LVPECL/LVDS interfaces.

Application Fields

The SN74AVCA406DGGRG4 can be used in a variety of application fields including automotive, automation, communications, Industrial, Medical and Mobile. As a differential signal re-driver, it can be used in applications that require high speed data signal integrity, such as Gigabit Ethernet or Fibre Channel. As a translator, it can be used to bridge between two interface protocols, such as LVPECL/LVDPs and LVTTL/LVCMOS. It can also be used in power supply monitoring/switching applications.

Working Principle

The SN74AVCA406DGGRG4 is an active differential signal re-driver with integrated termination. It receives differential signals at the input pins and assigns it to the output pins by redirecting a reconfigured differential signal. The device has PECL/LVDS interface at the input and output pins, supporting data transfer rate of up to 16Gb/s. The device also supports 8.5V CMOS/LVPECL/LVDS interface for receiver and transmitter circuits. The SN74AVCA406DGGRG4 employes on-chip 50 Ohm resistors to match the impedance of the transmission line. In addition, the differential termination helps to optimize the signal\'s return loss and equalize the reflections caused by discontinuities in the transmission line.

The SN74AVCA406DGGRG4 operates in a two-stage topology with a front-end driver at the receiver side and a back-end driver at the transmitter side. The front-end driver contains a VCO, input buffers and a pair of transistors working in push-pull configuration. The back-end driver contains a VCO, output buffers and another pair of transistors. The output of the back-end driver is connected to the input of the front-end driver, which ensures excellent signal integrity and edge control. The front-end driver and back-end driver work together to allow a differential signal incoming at the input pins to be redirected at the output pins, redriving and effectively boosting the signal.

In addition to active re-driving and integated termination, the SN74AVCA406DGGRG4 also offers protection against hot plugging and loopbacks. The device has an enable pin that allows the user to enable or disable the integrated termination. The enable pin also serves to protect the device from any damage during hot plugging or loopback operations. Whenever the enable pin is deasserted, the device will automatically switch to the output power supply.

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