XRT7250 Datasheet, PDF (38/463 Pages) Exar Corporation – DS3/E3 FRAMER IC

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DS3/E3 FRAMER IC
XRT7250
AC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = 25(C, VCC = 5.0V + 5% unless otherwise specified
SYMBOL
PARAMETER
MIN. TYP. MAX.
t₈
"TxFrameRef" hold-time, from rising edge of "TxIn-
6
Clk"
t₉
"TxInClk" to "TxOHInd" output delay
7
11
t_{10 "TxInClk" to "TxFrame" output delay}
6
10
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 3)
t_13A Max Delay of Rising Edge of TxNibClk to Data Valid
on TxNib[3:0]
DS3
E3
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 3)
t_{13 TxNibClk to TxNibFrame output delay}
20
25
25
31
Transmit Payload Data Input Interface - Local-Timed/Nibble Mode (See Figure 4)
t_{14 Payload Nibble set-up time, to "latching edge" of}
72
"TxInClk"
92
t_{15 Payload Nibble hold time, from "latching edge" of}
6
"TxInClk"
t_{16 TxFrameRef set-up time, to "latching edge" of "TxIn-} 72
Clk"
92
t_{17 TxFrameRef hold time, from "latching edge" of "TxIn-} 6
Clk"
t_{18 "TxNibClk" to "TxNibFrame" output delay time}
20
25
33
REV. 1.1.1
UNITS
CONDITIONS
ns Frame IC is "Frame
Slave"
ns
ns
ns DS3 Applications
ns E3 Applications
ns DS3 Applications
ns E3 Applications
ns DS3 Applications
ns E3 Applications
ns
ns DS3 Applications
ns E3 Applications
Framer IC is
"Frame Slave"
ns Frame IC is "Frame
Slave"
ns DS3 Applications
ns E3 Applications
19