XRT73R12_07 Datasheet, PDF (31/89 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

REV. 1.0.2
TxClk
TPData or
TNData
TTIP or
TRing
XRT73R12
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
FIGURE 15. TRANSMITTER TERMINAL INPUT TIMING
t_RTX
t_FTX
t_TSU
t_THO
SYMBOL
PARAMETER
TxClk Duty Cycle
TxClk Frequency
E3
DS-3
STS-1
t_RTX TxClk Rise Time (10% to 90%)
t_FTX TxClk Fall Time (10% to 90%)
t_TSU TPData/TNData to TxClk falling set up time
t_THO TPData/TNData to TxClk falling hold time
MIN
TYP
MAX
30
50
70
34.368
44.736
51.84
4
4
3
3
FIGURE 16. SINGLE-RAIL OR NRZ DATA FORMAT (ENCODER AND DECODER ARE ENABLED)
UNITS
%
MHz
MHz
MHz
ns
ns
ns
ns
Data
0
TPData
TxClk
1
1
0
28