BCM8108

Description

The BCM8108 is a fully integrated MSA-compliant multirate SONET/SDH/10GE/FC/FEC transmitter operating at OC-192 (9.953 Gbps), 10GE (10.3125 Gbps), 10GFC (10.513 Gbps), and Forward Error Correction (FEC) data rates (10.664/10.709, 11.096, or 11.31 Gbps). The BCM8108 provides selectable NRZ, RZ, or duobinary encoders, a serializer, and a Clock Multiplication Unit (CMU). The low-jitter LVDS interface and onboard low-jitter PLL exceed Optical Internetworking Forum (OIF), IEEE 802.3ae, Telcordia, ANSI, and ITU-T jitter standards.

The BCM8108 reference clock input frequency is user-selectable to the line rate divided by either 16 or 64. The two reference clock outputs can be squelched under user control. The BCM8108 provides skew control between the LVDS transmit parallel input clock and data to accommodate difficult timing variances. A 10-word FIFO decouples the parallel input timing domain from the serial output timing domain.