STC4130 Datasheet, PDF (16/44 Pages) List of Unclassifed Manufacturers – Synchronous Clock for SETS

Master T4
Clock
T1/E1
Generator
STC4130
Slave T4
Clock
T1/E1
Generator
STC4130
Programmable skew 0 to 409.5 nS
Figure 8: T4 CLK7 Master/Slave Skew Control
Once a pair of clock generators has been operating
in aligned master/slave mode, and a master/slave
switch occurs, the clock generator that becomes
master will maintain its output clock phase and fre-
quency while a phase rebuild (to the current output
clock phase) is performed on its selected reference
input. Therefore, as master mode operation com-
mences, there will be no phase or frequency hits on
the clock output. Assuming the phase offset is pro-
grammed for the actual propagation delay of this
cross-couple path, there will again be no phase hits
on the output clock of the clock generator that has
transitioned from master to slave. The data link will
also provide state information that will allow the new
master to lock on the same reference as the old mas-
ter.
STC4130
Synchronous Clock for SETS
Data Sheet
Data Sheet #: TM084 Page 16 of 44 Rev: P02 Date: 12/5/06
© Copyright 2006 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice