MAX9257GTL+T

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The MAX9257GTL+T is a serializer-deserializer (SERDES) for high-speed differential signal transmission and signal reference spreading, produced by Maxim Integrated. This device incorporates a 9-bit parallel signal input with a serial output, making it ideal for signal and data transmission applications.

The serializer and deserializer allow differential signal conversion between parallel and serial, with throughput up to 9.1Gbps per lane. A key feature of these devices is the signal reference spreading (SRS) feature, which uses an external crystal reference signal, converts it to an 8.5X spreader signal and recovers the signal to the desirable signal voltage levels at the receiver’s end.

One of the major advantages of using the MAX9257GTL+T is that it can be operated across a wide range of supply voltages: 3.3V and 1.8V. This is useful in applications that require the serializer to be powered from different sources, such as a single chip application or a two-chip application. The devices are also integrated with a temperature readout and power sequencing logic, allowing the designer to effectively manage the device’s power functions, ensuring proper operation across a broad temperature range.

In terms of functionality, the MAX9257GTL+T supports two types of data input: low voltage swing data and high voltage swing data. Low voltage swing data refers to the case where the signal is actively driven to the maximum and minimum voltage levels (e.g., SSTL_18). High voltage swing data refers to the case where the signal is actively driven to more than the maximum and minimum voltage levels (e.g., HSTL_18). The receiver automatically adjusts for the voltage level of its incoming data, ensuring reliable data reception.

In terms of application field, the MAX9257GTL+T is ideally suited for multimedia applications, such as digital video broadcasting and multimedia convergence. It is also suitable for high-speed networking applications, such as Ethernet, storage area networks (SANs), inter-cluster serial links, FibreChannels, InfiniBand and Serial RapidIO. The device is also well-suited for chip-to-chip and board-to-board communication, as well as backplane bridging applications.

As far as the working principle is concerned, the MAX9257GTL+T works by serializing the parallel data it receives and then transmitting this data in the form of a serial signal. The data is transmitted over a differential link, meaning that the signal is actually composed of two different signals, one with a positive polarity and one with a negative polarity. The receiver will then deserialize the signal back into its original parallel form. As stated previously, the signal reference spreading (SRS) feature converts the incoming crystal reference signal into an 8.5X spreader signal, ensuring a desirable signal voltage level at the receiver’s end.

In conclusion, the MAX9257GTL+T is an ideal serializer-deserializer for high-speed differential signal transmission and signal reference spreading, particularly for multimedia, high-speed networking and chip-to-chip/board-to-board communications. This device is capable of serializing, transmitting and deserializing parallel data up to 9.1Gbps, allowing it to be used in a wide range of applications.

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