XRT72L50 Datasheet, PDF (34/471 Pages) Exar Corporation – SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L50
SINGLE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. 1.2.1
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AC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = 25°C, VDD = 3.3V + 5% unless otherwise specified
SYMBOL
PARAMETER
MIN. TYP.
MAX.
t₉
TxInClk to TxOHInd output delay
15
t₁₀ TxInClk to TxFrame output delay
13
Transmit Payload Data Input Interface - Looped-Timed/Nibble Mode (See Figure 5)
t₁₁ TxNib set-up time to third rising edge of RxOutClk
30
t₁₂ Payload Nibble hold time, from latching edge of
30
RxOutClk
t₁₃ TxNibClk to TxNibFrame output delay
25
31
t_13A 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 6)
t₁₄ TxNib set-up time to third rising edge of TxInClk
20
27
t₁₅ Payload Nibble hold time, from latching edge of
0
TxInClk
t₁₆ TxFrameRef set-up time, to latching edge of TxInClk
20
27
UNITS
ns
ns
CONDITIONS
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
t₁₇ TxFrameRef hold time, from latching edge of TxNib- 0
Clk
t₁₈ TxNibClk to TxNibFrame output delay time
20
Framer IC is
Frame Slave
ns
Framer IC is
Frame Slave
25
ns DS3 Applications
31
ns E3 Applications
21