KSZ8721BI

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KSZ8721BI is part of a family of physical layer integrated circuit devices developed by Micrel,Inc specifically for Ethernet applications. The device is a single chip, full-featured, non-blocking and non-queue-generating 10Base-T/100Base-TX physical layer transceiver. It is ideal for connecting computers or other devices to an Ethernet network and supports both 10 megabits and 100 megabits Ethernet applications.

KSZ8721BI provides a full set of features for both 10Base-T and 100Base-TX, as well as support for MII and RMII operations. It is designed to be used in conjunction with standard Ethernet physical layer components and consumes less than 1.1W of power. The device fits in a 64-pin TQFP package, and is available in both commercial and industrial temperature ranges.

KSZ8721BI utilizes an embedded 10Base-T/100Base-TX physical-layer transceiver targeted towards cost-sensitive applications. It provides the capability of directly connecting both 10Base-T networks using a 4-wire UTP cable and 100Base-TX networks using a 2-pair UTP cable. The device runs at either 10 Mbps or 100 Mbps depending on the network in operation. It also features an energy-detect link mode, which can detect the presence of a link and puts the transceiver into the idle state to reduce power consumption and electromagnetic interference.

In addition to its physical layer transceiver functions, the KSZ8721BI also provides a range of management and operational features. It has an integrated MDI (Media-Dependent Interface) for interfacing to an external MII (Media Independent Interface), allowing for direct connection to a MAC (Media Access Controller), making it an ideal solution for many networking applications. The device also has a variety of auto-negotiation protocols, including NWay and 802.3ux, embedded for automatic network connection and configuration.

The KSZ8721BI also supports on-chip frame buffering, allowing the device to assemble both incoming and outgoing frames up to 10kbytes long. It also features advanced receive testing capabilities, programming of the link speed, and features loopback and power saving modes. The device also includes a variety of Anti-Alignment Protocols (AAP) to ensure accurate data reception across media of different speeds and types.

The KSZ8721BI is a powerful and highly integrated physical layer transceiver, which includes features to simplify design and board layout. It is an ideal solution for variety of applications including network adapters, network interface cards, and low-cost switching equipment. The device is designed for both short- and long-range applications, and utilizes advanced receiver technology to ensure accurate data reception in environments with high electromagnetic interference.

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