XRT75R12D_06 Datasheet, PDF (54/134 Pages) Exar Corporation – TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET

XRT75R12D
TWELVE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER REV. 1.0.1
TABLE 16: SYNCHRONOUS TIMING SPECIFICATIONS
SYMBOL
PARAMETER
MIN
t₀
Valid Address to CS Falling Edge
0
t₁
CS Falling Edge to RD Assert
0
t₂
RD Assert to RDY Assert
-
NA
RD Pulse Width (t₂)
40
t₃
CS Falling Edge to WR Assert
0
t₄
WR Assert to RDY Assert
-
NA
WR Pulse Width (t₄)
40
PCLK Period
15
PCLK Duty Cycle
PCLK "High/Low" time
MAX
-
-
35
-
-
35
-
UNITS
ns
ns
ns, see note 1
ns
ns
ns, see note 1
ns
ns
NOTE: 1. This timing parameter is based on the frequency of the synchronous clock (PCLK). To determine the access
time, use the following formula: (PCLK_period * 2) + 5ns
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