51940-589LF

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The 51940-589LF is a high-performance, low-cost transceiver for full-duplex data communication over unshielded twisted-pair (UTP) cable. It is especially suitable for use in Ethernet Local Area Networks (LANs) and related data transmission applications. This article provides an overview of the 51940-589LF’s application fields and working principle.

Application Fields

The 51940-589LF is ideal for use in an Ethernet network, where it supports 10Base-T and 100Base-Tx data rates. It is also suitable for other applications such as token ring networks, 100Base-Fx applications, point-to-point twisted pair configurations, and industrial automation and control networks. It is a full-featured, 22-pin package that incorporates all of the features necessary to make Ethernet connections, such as a medium-independent interface (MII) for IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX and 100BASE-FX, and a physical layer interface (PHY) for Ethernet and Fast Ethernet.

The 51940-589LF offers excellent immunity to electro-magnetic interference (EMI), which is important for industrial applications. It meets the IEEE 802.3 10Base-T and 100Base-TX standard requirements for EMI and immunity to electro-static discharge (ESD). It also features loopback test mode, which is used for testing and verifying network connectivity. In addition, it has an integrated network processor, which provides five independent protocol processors that can be configured for use with several protocols.

Working Principle

The 51940-589LF uses a single-chip implementation to transmit and receive Ethernet data over twisted pair cables. This design is based on the medium independent interface (MII) and the physical layer interface (PHY) standards for Ethernet. The MII and PHY provide the link between the data terminal equipment (DTE) and the media access control (MAC) layer of the Ethernet infrastructure.

The MII is implemented as a logic interface between the MAC layer and the PHY. It manages the data flow between the two layers, allowing data to be transferred from the MAC layer to the PHY, and from the PHY to the MAC layer. The PHY implements two physical interfaces: 10BASE-T and 100BASE-TX. It converts the data received from the MAC layer into electrical signals that are transmitted over the twisted pair cable and vice versa. Additionally, the PHY also performs a number of operations such as framing, error detection, and collision detection.

The 51940-589LF transceiver also includes several features that enable it to operate with minimal power consumption. These include low-power sleep and wake modes, standby mode, as well as a low-power device-level addressing scheme. In addition, the device supports multiple speeds, allowing it to adjust to changing network conditions automatically.

The 51940-589LF is a highly reliable and cost-effective transceiver for use in Ethernet networks. It is designed to operate efficiently with minimal power consumption, providing excellent EMI and ESD immunity. It supports 10BASE-T and 100BASE-TX protocols, as well as loopback test mode and integrated network processor. Additionally, it provides easy configuration and setup, making it a great choice for Industrial automation and control systems.

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