78P2352
Dual Channel
OC-3/ STM1-E/ E4 LIU
ELECTRICAL SPECIFICATIONS (continued)
REFERENCE CLOCK CHARACTERISTICS:
PARAMETER
SYMBOL CONDITIONS
MIN NOM MAX UNIT
CKREF Duty Cycle
--
40
60
%
Synchronous mode; E4
-15
+15
CKREF Frequency Stability
--
Synchronous mode; STM1
-20
Plesiochronous or Loop-timing
mode. (see Note 1)
-75
+20
ppm
+75
Note 1: In Plesiochronous mode, the transmit clock/data source (i.e. framer/system reference clock) must still
be of +/-20ppm quality (+/-15ppm for E4) in order to meet the ITU-T (or Telcordia) bit rate requirements.
RECEIVER TIMING CHARACTERISTICS:
PARAMETER
SYMBOL CONDITIONS
RCLK Duty Cycle
TRCF/TRC
Clock to Q
RSCQ
RPCQ
Serial mode
Parallel mode
MIN NOM MAX UNIT
40
60
%
0
1
ns
-1
2
TIMING DIAGRAM: Receive Waveforms
TRC = 6.43ns
TRCF = 3.215ns
SOxCKN
SOxCKP
SOxDP
SOxDN
RSCQ
TRCT
POxCK
POxD<0:3>
TRC = 25.72ns
TRCF = 12.86ns
RPCQ
TRCT
Page: 27 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4