XRT75L04D Datasheet, PDF (22/98 Pages) Exar Corporation – FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L04D
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FOUR CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.1
2.0 TIMING CHARACTERISTICS
FIGURE 3. TYPICAL INTERFACE BETWEEN TERMINAL EQUIPMENT AND THE XRT75L04D (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
TPOS or
TNEG
TTIP or
T R IN G
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%)
TxCLKFall Time (10% to 90%)
TPOS/TNEG to TxCLK falling set up time
TPOS/TNEG to TxCLK falling hold time
TTIP/TRINGto 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
18