S4850 - Dual OC-48 SONET/SDH CRU
The function of the S4850 clock and data recovery unit is to derive high speed timing signals for SONET/SDHbased equipment.
The S4850 receives an OC-48 scrambled NRZ signal and recovers the clock from the data.
The chip outputs a differential bit clock and retimed data.
Figure 1 shows a typical netw
S4850 Dual OC-48 SONET/SDH CRU with FEC Rate Support Product Brief PB2006_v1.00_01/26/05 www.DataSheet4U.com Overview S485 0 The dual S4850 supports clock recovery for the OC-48 (+ FEC) data rates.
The differential serial data is input to the chip and clock recovery is performed on the incoming data stream.
An external reference clock is required to minimize the PLL lock time and provide a stable output clock source in the absence of serial input data.
Retimed data and clock are output from th
S4850 Features
* CMOS 0.13 micron technology Complies with Bellcore and ITU-T specifications for jitter tolerance, jitter transfer, and jitter generation On-chip high-frequency PLLs for clock generation and clock recovery Supports clock recovery for 2.488 Gbps (OC-48) with FEC Selectable referenc
