Protocol Controller Handles 256 Channels

The MCHDLC is a full-duplex, 256-channel high-level data link control (HDLC) device that provides interfaces for as many as eight independent serial data streams. Each serial interface can support a variety of line rates, configurable in one of four formats: T1 channelized (framed) or unchannelized, and E1 channelized (framed) or unchannelized. Optionally, the device can support up to two serial interfaces with line rates up to 8 Mbits/s in an unchannelized format. The VLSI device performs Layer 2 HDLC formatting/de-formatting at data rates from 8 kbps up to 2.048 Mbps. The 304-pin BGA requires a single 3.3V supply and supports 5V-tolerant signal I/Os.