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XRT79L71_07 Datasheet, PDF (95/109 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE
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REV. 1.0.0
XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE
TABLE 15: TIMING INFORMATION FOR THE TRANSMIT UTOPIA INTERFACE BLOCK
SYMBOL
PARAMETER
MIN.
TYP
MAX.
UNITS
t11 TxUClav signal valid (not Hi-Z) from first TxUClk rising edge of
3.6
valid and correct TxUAddr[4:0]
9.7
ns
t12 TxUClav signal Hi-Z from first TxUClk rising edge of different
3.6
TxUAddr[4:0]
9.7
ns
TRANSMIT PAYLOAD DATA INPUT INTERFACE
TRANSMIT PAYLOAD DATA INPUT INTERFACE - TIMING REQUIREMENTS
TABLE 16: TIMING INFORMATION FO RTHE TRNASMIT PAYLOAD DATA INPUT INTERFACE BLOCK
Test Conditions: TA = 25°C, VDD = 3.3V + 5% unless otherwise specified
SYMBOL
PARAMETER
MIN. TYP. MAX. UNITS
CONDITIONS
Transmit Payload Data Input Interface - Loop-Timed/Serial Mode (See Figure 17)
t1
Payload data (TxSer) set-up time to rising edge of
12
ns
RxOutClk
t2
Payload data (TxSer) hold time, from rising edge of
0
ns
RxOutClk
t3
RxOutClk to TxFrame output delay
5
ns
t4
RxOutClk to TxOHInd output delay
6
ns
Transmit Payload Data Input Interface - Local Timed/Serial Mode (See Figure 18)
t5
Payload data (TxSer) set-up time to rising edge of
4
ns
TxInClk
t6
Payload data (TxSer) hold time, from rising edge of
0
ns
TxInClk
t7
TxFrameRef set-up time to rising edge of TxInClk
2
ns
Framer IC is
Frame Slave
t8
TxFrameRef hold-time, from rising edge of TxInClk
0
ns
Frame IC is
Frame Slave
t9
TxInClk to TxOHInd output delay
15
ns
t10 TxInClk to TxFrame output delay
13
ns
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 19)
t11 TxNib set-up time to third rising edge of RxOutClk
30
ns
t12 Payload Nibble hold time, from latching edge of
30
ns
RxOutClk
t13 TxNibClk to TxNibFrame output delay
25
ns DS3 Applications
31
ns E3 Applications
t13A Max Delay of Rising Edge of TxNibClk to Data Valid
20
on TxNib[3:0]
27
Transmit Payload Data Input Interface - Local-Timed/Nibble Mode (See Figure 20
ns DS3 Applications
ns E3 Applications
92
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