XRT75L03D Datasheet, PDF (37/134 Pages) Exar Corporation – THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

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XRT75L03D
THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.0
2.0 TIMING CHARACTERISTICS
FIGURE 3. TYPICAL INTERFACE BETWEEN TERMINAL EQUIPMENT AND THE XRT75L03D (DUAL-RAIL DATA)
TxPOS
TPData
Terminal
Equipment
(E3/DS3 or STS-1
Framer)
TxNEG
TxLineClk
TNData
TxClk
Transmit
Logic
Block
Exar E3/DS3/STS-1 LIU
T xC lk
TPData or
T N D a ta
TTIP or
TRing
FIGURE 4. TRANSMITTER TERMINAL INPUT TIMING
t_RTX
t_FTX
t_TSU
t_THO
t_TDY
SYMBOL
PARAMETER
TxClk
Duty Cycle
E3
DS3
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
t_TDY TTIP/TRing to TxClk rising propagation delay time
MIN
TYP
MAX
UNITS
30
50
70
34.368
44.736
51.84
%
MHz
MHz
MHz
4
ns
4
ns
3
ns
3
ns
8
ns
32