The IDT77105 is a member of IDT's family of products developed to support Asynchronous Transfer Mode (ATM) data communications and networking. The IDT77105 provides the Transmission Convergence (TC) and (PMD) layers of a 25.6 Mbps ATM PHY suitable for ATM networks using Unshielded Twisted Pair (UTP) Category 3 (or better) wiring. The UTOPIA interface provides standardized control and communications to other components, such as Segmentation and Reassembly (SAR) controllers and ATM switches. The IDT77105 supports a simple interface to magnetics modules. The IDT77105 is fabricated using IDT's state-of-the-art CMOS technology, providing the highest levels of integration, performance and reliability, with the low-power consumption characteristics of CMOS.