ML6691 Datasheet | Micro Linear

March 1997 ML6691- 100BASE-T MII-to-PMD Transceiver GENERAL DESCRIPTION The ML6691 implements the upper portion of the physical layer for the Fast Ethernet 100BASE-T standard. Functions contained in the ML6691 include a 4B/5B encoder/ decoder, a Stream Cipher scrambler/descrambler, and collision detect. Additional functions of the ML6691 - accessible through the two-wire MII management interface - include full duplex operation, loopback, power down mode, and MII isolation. The ML6691 is designed to interface to a 100BASE-T Ethernet Media Access Controller (MAC) via the MII (Media Independent Interface) on one side, and a 100BASE-X PMD transceiver on the other side. A plete 100BASE-TX...