DS1481S

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The DS1481S is a specialized interface IC that is primarily used in dual processor systems for single node backplane architectures. It enables high-speed communication between two processors. The device consists of a pair of LVDS (Low Voltage Differential Signaling) output ports, a pair of differential reference measurement inputs, and a charge pump voltage reference output. The device is designed to provide a full-duplex high-speed, low-power communication interface between two system processors.

It uses a strategy known as “stereo vision” to achieve this. With “stereo vision”, each processor on the backplane communicates with the other through two separate channels of data. This technique allows for greater data throughput, as each processor can utilize the data received through each of the channels in turn.

The DS1481S works by converting the differential reference signal from the other processor into a single-ended digital signal. This signal is then passed through a Demux block. This block separates the two differential signals from the reference signal and routes them to different digital output ports. The output signals are then routed to the processor via LVDS transmitters. The LVDS transmitters use differential signaling, which allows for the efficient transmission of digital data over a short distance.

The processor can then confirm the receipt of the data by using the charge pump voltage reference output. This reference is used to ensure that the processor is interpreting the data correctly. The data received is then processed by the other processor, and the process is repeated in reverse. This process is repeated continuously, allowing for near real-time communication between the two processors.

The DS1481S is used mainly in server and high-end workstation applications where a high-speed communication interface is required. Its low-power consumption makes it especially suited for use in systems which require frequent communication between processors. Its small form factor allows it to be used in tight spaces, such as backplanes in servers.

In addition to its use as an interface IC, the device also provides several other features. These include two reference measurement inputs, which can be used to measure the distance between two processors. It also has digital filtering blocks, which are used for signal conditioning. This can help reduce digital noise and improve system performance.

Overall, the DS1481S is a highly specialized interface IC that provides high-speed, low-power communications between two processors. Its specialized features make it ideal for use in server and high-end workstation applications where a high-speed communications interface is required. Its small form factor and low power consumption also make it suitable for applications where frequent communication between processors is necessary.

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