XRT75L00D Datasheet, PDF (21/92 Pages) Exar Corporation – E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

REV. 1.0.2
XRT75L00D
E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
2.0 TIMING CHARACTERISTICS
FIGURE 3. TYPICAL INTERFACE BETWEEN TERMINAL EQUIPMENT AND THE XRT75L00D (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
TxClk
TPData or
TNData
TTIP or
TRing
FIGURE 4. TRANSMITTER TERMINAL INPUT TIMING
t_RTX
t_FTX
t_TSU
t_THO
t_TDY
SYMBOL
TxClk
t_RTX
t_FTX
t_TSU
t_THO
t_TDY
PARAMETER
Duty Cycle
E3
DS3
STS-1
TxClk Rise Time (10% to 90%)
TxClk Fall Time (10% to 90%)
TPData/TNData to TxClk falling set up time
TPData/TNData to TxClk falling hold time
TTIP/TRing to TxClk rising propagation delay time
MIN
TYP
MAX
UNITS
30
50
70
34.368
44.736
51.84
4
%
MHz
MHz
MHz
ns
4
ns
3
ns
3
ns
8
ns
16