XRT79L71IB datasheet(71/441 Pages) EXAR

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PRELIMINARY

XRT79L71

1 - CHANNEL DS3/E3 ATM UNI/PPP COMBO IC

REV. P1.0.3

RECEIVE OVERHEAD DATA OUTPUT INTERFACE

RECEIVE OVERHEAD DATA OUTPUT INTERFACE - TIMING REQUIREMENTS

Table 13, Timing Information for the Receive Overhead Data Output Interface Block

AC ELECTRICAL CHARACTERISTICS (CONT.)

Test Conditions: TA = 25°C, VDD = 3.3V + 5% unless otherwise specified

SYMBOL

PARAMETER

MIN.TYP.MAX.UNITS

CONDITIONS

Receive Overhead Data Output Interface Timing - Method 1 - Using RxOHClk (see Figure 17)

t59A

Falling edge of RxOHClk to RxOHFrame output

DS3 Applications

E3 Applications

t59B

Falling edge of RxOHClk to RxOH output delay

DS3 Applications

E3 Applications

Receive Overhead Data Output Interface Timing - Method 2 - Using RxOHEnable (see Figure 18)

t60

Rising edge of RxOutClk to rising edge of

RxOHEnable delay.

29.4

t60A

Rising edge of RxOHFrame to rising edge of

RxOHEnable delay

224

DS3 Applications

E3, ITU-T G.832

Applications

E3, ITU-T G.751

Applications

t60B

RxOH Data Valid to rising edge of

RxOHEnable delay

DS3 Applications

E3, ITU-T G.832

Applications

E3, ITU-T G.751

Applications

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