XRT72L56 Datasheet, PDF (49/486 Pages) Exar Corporation – SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

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PRELIMINARY
XRT72L56
SIX CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.2
AC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = 25(C, VCC = 3.3V + 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
t₁₀ "TxInClk" to "TxFrame" output delay
6
10
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 5)
t₁₁ + t_13A Payload data set-up time to "latching edge" of
74
RxOutClk
DS3
94
E3
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 5)
t₁₂ Payload data hold time, from "latching edge" of
6
RxOutClk
t₁₃ TxNibClk to TxNibFrame output delay
20
25
25
31
Transmit Payload Data Input Interface - Local-Timed/Nibble Mode (See Figure 6)
t₁₄ Payload Nibble set-up time, to "latching edge" of
72
"TxInClk"
92
t₁₅ Payload Nibble hold time, from "latching edge" of
6
"TxInClk"
t₁₆ TxFrameRef set-up time, to "latching edge" of "TxIn- 72
Clk"
92
t₁₇ TxFrameRef hold time, from "latching edge" of "TxIn- 6
Clk"
t₁₈ "TxNibClk" to "TxNibFrame" output delay time
20
25
33
UNITS
ns
ns
ns
CONDITIONS
Frame IC is
"Frame Slave"
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
30