XRT79L71_07 Datasheet, PDF (102/109 Pages) Exar Corporation – 1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE

XRT79L71
1-CHANNEL DS3/E3 ATM UNI/PPP/CLEAR-CHANNEL FRAMER IC - HARDWARE
RECEIVE PAYLOAD DATA OUTPUT INTERFACE
RECEIVE PAYLOAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS
REV. 1.0.0
TABLE 18: TIMING INFORMATION FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE BLOCK
Test Conditions: TA = 25°C, VDD = 3.3V + 5% unless otherwise specified
SYMBOL
PARAMETER
MIN. TYP. MAX. UNITS
CONDITIONS
Receive Payload Data Output Interface Timing - Serial Mode Operation (See Figure 23)
t₅₀ Rising edge of RxClk to Payload Data (RxSer) out-
put delay
13
ns DS3 Applications
16
ns 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
Receive Payload Data Output Interface Timing - Nibble Mode Operation (see Figure 24)
t₅₃
Falling edge of RxClk to rising edge of RxFrame out-
put delay
t₅₄
Falling edge of RxClk to rising edge of RxNib[3:0]
output delay
2.1
ns
2
ns
E3 Applications
FIGURE 23. TIMING DIAGRAM FOR THE RECEIVE PAYLOAD DATA OUTPUT INTERFACE (SERIAL MODE)
XRT79L71 Receive Payload Data I/F Signals
t50
RxClk
RxSer
RxFrame
RxOHInd
Payload[4702] Payload[4703]
t51
X-Bit
t52
Payload[0]
99