Interface de Rede

DP83848KSQ/NOPB

DP83848KSQ/NOPB - 10/100 Ethernet PHY, WQFN-40 | Texas Instruments

The Texas Instruments DP83848KSQ/NOPB is a single-port 10/100 Mbps Ethernet physical layer transceiver (PHY) in a 40-pin WQFN (6x6 mm) package. It implements the IEEE 802.3u standard for 100BASE-TX and 10BASE-T, providing a complete physical layer solution with MII (Media Independent Interface) and RMII connectivity to a MAC controller. Operating from a 3.3V supply, the device is targeted at industrial and embedded networking applications. An Ethernet PHY is the physical layer transceiver that interfaces between a digital MAC (Media Access Controller) and the physical twisted-pair cable. It handles encoding, serialization, line driving, and reception of Ethernet frames. The DP83848x family belongs to the PHYTER series, within the broader hierarchy of Ethernet interface ICs -> network interface ICs -> communication interface ICs -> integrated circuits. Key features include Auto-MDIX for automatic crossover detection, eliminating the need for crossover cables. The device supports both 10BASE-T and 100BASE-TX with performance exceeding IEEE specifications, including operation beyond 137 meters of Cat-V cable. It offers low power consumption and a small footprint suitable for space-constrained designs, with industrial temperature support from -40C to +85C. The DP83848K integrates a digital adaptive equalizer, echo canceller, and baseline wander correction to ensure reliable data transmission. The device includes an MDIO serial management interface for configuration and status monitoring, with support for dynamic control of Auto-MDIX and LED indicators. The architecture is built on a low-power 3.3V CMOS process, achieving IEEE 802.3u compliance. Typical applications include industrial control systems, embedded networking, IP cameras, IoT gateways, factory automation controllers, and building automation. The industrial temperature range makes it suitable for harsh environments such as outdoor enclosures, machine-to-machine communication, and test equipment with extended thermal requirements. When designing with this PHY, ensure proper isolation transformer selection and 50 ohm termination resistors for the magnetics interface. Careful PCB layout is required to minimize EMI and maintain signal integrity on the differential pairs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.