DS90UB901QSQX/NOPB

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The DS90UB901QSQX/NOPB is a high-speed serializer/deserializer (SerDes) device from Texas Instruments that can help designers easily develop high-speed data communications. The device has an integrated low power, high speed serializer/deserializer that translates between LVDS signal levels and CML signal levels. In this article, we will discuss the application field and working principle of the DS90UB901QSQX/NOPB.

The DS90UB901QSQX/NOPB is designed for applications such as critical networking, telecom/data switches, radar systems, 10/40 Gigabit Ethernet, and HDTV displays. It is also used in applications that use point-to-point connections between computers, fiber optics, digital signal processors, optical storage devices, and other digital systems. The SerDes can accommodate a wide variety of bi-directional data rates from 150 Mbps to 3.072 Gbps.

The DS90UB901QSQX/NOPB has two-channel, full-duplex, serializer/deserializer that supports LVDS and CML signal levels. It supports data rates from 150 Mb/s to 3.072 Gb/s or higher and is compatible with most LVDS/CML signal standards. Its integrated buffered signals can supply +2.5 V LVDS and +2.5 V CML outputs. The SerDes has built-in voltage detection circuits that can detect VDD under-voltages and it provides reset signal output to reset the I/O logic during VDD under-voltages.

The DS90UB901QSQX/NOPB implements a 3-Tap Delay Interpolator (DI). The DI has an input delay line where the data is received and stored. When data is received at the input, it is stored in the Input Delay Line (IDL). When the data transfer is complete, the data is then read from the IDL and sent through the bidirectional output ports of the device. During this process, the delay values are adjusted to optimize the signal quality and timing over the intended data rate. This process is known as Delay Interpolation or DI.

The DS90UB901QSQX/NOPB includes a phase locked loop (PLL) that can be used to lock on to the incoming data rate and provide accurate transfer of data at the desired speed. The PLL can also be used to provide a phase offset between the two serial channels for synchronization purposes. Additionally, the PLL can be used to recover the clock information from the received data stream.

The SerDes supports redundant 8b/10b encoding/decoding to ensure reliable data transmission over an LVDS link. 8b/10b is a type of line coding used to balance the number of 1s and 0s in the data stream. This increases the signal to noise ratio and reduces jitter, improving the overall performance. The DS90UB901QSQX/NOPB also supports 4:1 Transmitter Channel SerDes and Receiver Channel SerDes for increased data transmission speed. Additionally, it supports differential detected receive operations, which can detect more than three transition levels.

The DS90UB901QSQX/NOPB has an advanced link-side error detection and correction (EDCC) capability, which can detect and correct errors in the received data stream. It has built-in brown-in and synchronization detection, which are usually used in applications that require fault-resistant data communication. The device also has an asynchronous serial interface (ASI) which can be used to connect microcontrollers to the device.

In conclusion, the DS90UB901QSQX/NOPB is a high-performance serializer/deserializer device from Texas Instruments. It is designed for applications such as critical networking, telecom/data switches, radar systems, 10/40 Gigabit Ethernet, and HDTV displays. Its integrated low power, high speed serializer/deserializer facilitates data rate translation between LVDS and CML signal levels. The SerDes supports various bi-directional data rates from 150 Mbps to 3.072 Gbps. It includes a 3-Tap Delay Interpolator (DI) and PLL to lock on to the incoming data rate. Additionally, it supports redundant 8b/10b encoding/decoding, 4:1 Transmitter Channel SerDes and Receiver Channel SerDes and differential detect receive operations. Finally, it has link-side error detection and correction (EDCC) capability and supports an asynchronous serial interface (ASI).

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