SN74AUC126RGYR

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Logic devices, such as buffers, drivers, receivers, and transceivers, are essential components in various modern electronic systems. The SN74AUC126RGYR is a unique example of such a device, and it offers a significant set of features and capabilities. This article will examine its application field and working principle.

The SN74AUC126RGYR is a dual-channel, low-voltage differential signal (LVDS) transceiver. It is designed to operate in both the 1.8V logic and 3.3V logic voltage levels, as well as in the LVDS logic level range of 0.5 to 1.5V. This makes it suitable for a variety of applications, such as backplane communications, high-speed data transmission, and video data transmission.

The SN74AUC126RGYR has an on-chip input termination resistor for each of its two LVDS channels, allowing for direct connection to LVDS signals without the need for external resistors. It also has options for external termination if required, for added flexibility. The input termination resistors can be adjusted to match the characteristics of the LVDS interface and optimize signal integrity. The transceiver also has a separate, dedicated channel for I²C and SMBus communications, making it a perfect choice for systems that require both LVDS and I²C communications concurrently.

The SN74AUC126RGYR is a full-duplex transceiver, meaning it can both transmit and receive data simultaneously. The TX and RX channels are isolated from each other, and the LVDS channels are actively driven for maximum noise and jitter performance. The on-chip termination resistors, adjustable via an external control pin, are designed to optimize noise and jitter performance. The wide voltage range also makes it suitable for both low- and high-voltage operations.

The SN74AUC126RGYR\'s working principle is simple yet effective. The transceiver converts differential input signals into a single-ended signal and transmits it over a single LVDS channel. The signal is then converted back into a differential signal at the receiving end, and is then sent back to the transmitting end. This process is referred to as "data retiming," and it is used to ensure that the data is properly transmitted and received, regardless of the distance between the transmitting and receiving devices.

The SN74AUC126RGYR is an ideal choice for applications that require reliable, high-speed data transfer. Its low-voltage operation and wide voltage range make it suitable for a variety of communications applications. Its on-chip termination resistors and adjustable termination resistance value provide maximum noise and jitter performance. And its full-duplex capabilities, combined with its ability to convert differential signals into single-ended signals, make it an invaluable component in a wide range of systems.

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