KSZ8841-32MQL

The KSZ8841-32MQL, manufactured by Micrel, is an advanced, high performance, quad port physical layer device supporting both 10 Mbps and 100 Mbps networks for Ethernet applications. The device integrates several features that simplify system design including rate auto-sensing, auto-negotiation, auto-discovery, remote wake up, extended link detection, and Ethernet turboMII. These features make the device well-suited to embedded applications while requiring a minimal number of components.

The physical layer (PHY) is the electrical circuit used to transmit data over a physical medium, such as copper wire or fiber optic cable. A PHY converts the signals generated by the MAC (media access control) layer of the network protocol stack into a form suitable for transmission over the physical medium. It also detects the signals sent by a remote PHY and converts them into a compatible form for the MAC layer. The KSZ8841-32MQL includes four independent PHYs, each with a separate physical address, enabling the device to connect to multiple networks simultaneously.

The KSZ8841-32MQL features a power-efficient tri-speed transceiver that can switch automatically between 10 Mbps, 100 Mbps, and 1000 Mbps. Each transceiver has its own adjustable transmitter equalizer and receiver equalizer, enabling the device to transmit and receive data on both normal and extended cable lengths. The device also includes programmable auto-negotiation and auto-discovery features that make it possible to identify and connect to Ethernet networks automatically and without user intervention.

In addition to its PHYs, the KSZ8841-32MQL also includes several features to simplify system design and minimize power consumption. For example, the device features a low power sleep mode which can be used to conserve power when the device is not in use. The device also includes an automatic configuration ability that enables it to detect the presence of a remote PHY and configure itself accordingly. Additionally, the device supports a variety of options for extended link detection and Ethernet turboMII, two features that allow the device to detect and negotiate link settings with remote PHYs quickly and accurately.

The KSZ8841-32MQL is an ideal choice for embedded applications such as home gateways and digital home equipment that require Ethernet connectivity. Its combination of features enables it to identify and connect to Ethernet networks quickly, accurately, and reliably, while minimizing power consumption. Its advanced transceiver and equalizer technology enables it to transmit and receive data over both normal and extended cable lengths, simplifying system design and development. Finally, its programmable auto-negotiation and auto-discovery features make it easy to connect to an Ethernet network without requiring user intervention.