KSZ8721BT

Introduction

The KSZ8721BT is a single-chip, low-power, low-cost 10/100M Ethernet Physical Layer Transceiver (PHY). It is based on the IEEE 802.3u standard, providing an Integrated 10/100M Auto-Negotiation Media Access Control (MAC) data link functionality with an advanced auto-negotiation system that is based upon the fast link pulse (FLP) technology.

The KSZ8721BT interfaces to both 10/100M Ethernet devices with MII/RMII interfaces, and easily integrates with several popular CPUs. It can support the energy-efficient Ethernet (EEE), providing both lower-power operation in lower-speed address pairs, as well as faster link-up time.

The KSZ8721BT\'s low-power operation, high-density 7mm x 7mm TQFP48 package, and single-chip functionality make it an ideal solution for driving miniaturized portable, set-top-box, and embedded designs that require Ethernet connectivity.

Application Field

The KSZ8721BT is designed for use in a variety of different applications, including routers, switches, networked storage systems, automotive infotainment systems, and surveillance systems.

The KSZ8721BT is well-suited for networking switches, relays and transceivers. It can provide a high-speed connection between nodes, enabling communication and data transfer through both wired and wireless networks. In addition to its Ethernet connectivity, the KSZ8721BT can be used for bonding multiple devices, creating intelligent or remote-controlled switching networks.

The low-power operation of the KSZ8721BT is ideal for designs that require a low-power solution for transmitting or receiving data. The lower power consumption also means that less heat is generated, which makes the chip ideal for use in automotive infotainment systems, which need to constantly process data without drawing attention to their power consumption. The power-saving nature of the KSZ8721BT can also be used in surveillance systems, allowing them to remain idle while still maintaining an active connection.

Working Principle

The KSZ8721BT\'s operating principle is based on the IEEE 802.3u standard. It features a sophisticated automatic negotiation system that is based on the fast link pulse (FLP) technology. This technology allows the PHY to automatically identify and negotiate the correct data transfer rate for a given connection.

The KSZ8721BT has a comprehensive set of features that enable it to hold a stable connection even under unfavorable conditions. These features include adaptive equalization which enables the chip to detect and compensate for line impairments, such as echo and crosstalk. The chip also features a low-power version of the auto-negotiation system which conserves energy when negotiating low-speed connection environments.

Furthermore, the KSZ8721BT is fully compliant with the most recent revision of the 10/100M Ethernet standard, allowing it to support the energy-efficient Ethernet (EEE). Through the use of EEE, the PHY can achieve data transfer rates of up to 1000 Mbps without sacrificing power efficiency.

Conclusion

The KSZ8721BT is a low-power, low-cost 10/100M Ethernet PHY. It is designed to integrate easily with most popular CPUs and to support the energy-efficient Ethernet (EEE) standard. It features an advanced auto-negotiation system which enables the PHY to automatically identify and negotiate the correct data transfer rate for a given connection. In addition, the chip\'s low-power operation, high-density TQFP48 package, and single-chip functionality make it a great solution for miniaturized, portable, set-top-box, and embedded designs.