82551IT – INTEL

The Intel 82551IT is a single-chip Fast Ethernet controller integrated with a physical layer transceiver. Fabricated using CMOS technology, it supports 10BASE-T and 100BASE-TX Ethernet standards, enabling network connectivity at 10 Mbps and 100 Mbps, respectively. The “D/C 1135” marking indicates a date code of week 35 of the year 2011. This controller interfaces with the host system via a PCI bus, adhering to PCI specification revision 2.2, and supports bus mastering for efficient data transfer, minimizing CPU utilization. It incorporates internal FIFOs for transmit and receive data buffering, mitigating potential data overruns. The 82551IT features integrated media access control (MAC) functionality, including collision detection and backoff algorithms, and supports full-duplex operation, allowing simultaneous transmission and reception of data. It is designed for integration into embedded systems, network interface cards (NICs), and motherboard LAN solutions.