XRT72L53 Datasheet, PDF (37/467 Pages) Exar Corporation – THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER

XRT72L53
THREE CHANNEL DS3/E3 FRAMER IC WITH HDLC CONTROLLER
REV. P1.1.8
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PRELIMINARY
AC ELECTRICAL CHARACTERISTICS (CONT.)
Test Conditions: TA = 25°C, VDD = 3.3V + 5% unless otherwise specified
SYMBOL
PARAMETER
MIN. TYP.
MAX. UNITS
CONDITIONS
t₄₀ RxPOS or RxNEG set-up time to falling edge of
0
ns
RxLineClk.
(Framer is configured to sample data on RxPOS and
RxNEG input pins, on the falling edge of RxLineClk)
t₄₁ RxPOS or RxNEG hold time, from falling edge of
3
ns
RxLineClk
(Framer is configured to sample data on RxPOS and
RxNEG input pins, on the falling edge of RxLineClk)
Receive Payload Data Output Inteface Timing - Serial Mode Operation (See Figure 13)
t₅₀ Rising edge of RxClk to Payload Data (RxSer) out-
put delay
13
ns
16
ns
DS3 Applications
E3 Applications
t₅₁ Rising edge of RxClk to RxFrame output delay
13
ns DS3 Applications
16
ns E3 Applications
t₅₂ Rising edge of RxClk to RxOHInd output delay.
13
ns DS3 Applications
16
ns E3 Applications
Receive Payload Data Output Interface Timing - Nibble Mode Operation (see Figure 14)
t₅₃
Falling edge of RxClk to rising edge of RxFrame out-
put delay
2.1
ns
t₅₄
Falling edge of RxClk to rising edge of RxNib[3:0]
output delay
2
ns
Receive Overhead Data Output Interface Timing - Method 1 - Using RxOHEnable (see Figure 15)
t_59A ^{Falling edge of RxOHClk to RxFrame output}
20
23
ns DS3 Applications
25
t_59B ^{Falling edge of RxClk to RxOH output delay}
20
0
ns E3 Applications
23
ns DS3 Applications
25
0
ns E3 Applications
Receive Overheadf Data Output Interface Timing - Method 2 - Using RxOHEnable (see Figure 16)
t₆₀ Rising edge of RxOutClk to rising edge of
2
9.4
ns
RxOHEnable delay.
t_60A Rising edge of RxOHFrame to rising edge of
RxOHEnable delay
88
ns ^{DS3 Applications}
224
ns ^{E3, ITU-T G.832}
Applications
t_60B RxOH Data Valid to rising edge of
RxOHEnable delay
28
ns ^{E3, ITU-T G.751}
Applications
88
ns ^{DS3 Applications}
85
ns ^{E3, ITU-T G.832}
Applications
28
ns ^{E3, ITU-T G.751}
Applications
37