參數(shù)資料
型號: XRT83VSH316IB
廠商: Exar Corporation
文件頁數(shù): 18/98頁
文件大?。?/td> 0K
描述: IC LIU SH T1/E1/J1 16CH 316STBGA
標準包裝: 60
類型: 線路接口裝置(LIU)
驅動器/接收器數(shù): 16/16
規(guī)程: T1,E1,J1
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 表面貼裝
封裝/外殼: 316-LBGA
供應商設備封裝: 316-STBGA(21x21)
包裝: 托盤
XRT83VSH316
22
REV. 1.0.1
16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
3.2
Clock and Data Recovery
The receive clock (RCLK) is recovered by the clock and data recovery circuitry. An internal PLL locks on the
incoming data stream and outputs a clock that’s in phase with the incoming signal. This allows for multi-
channel T1/E1/J1 signals to arrive from different timing sources and remain independent. In the absence of an
incoming signal, RCLK maintains its timing by using the internal master clock as its reference. The recovered
data can be updated on either edge of RCLK. By default, data is updated on the rising edge of RCLK. To
update data on the falling edge of RCLK, set RCLKE to "1" in the appropriate global register. Figure 6 is a
timing diagram of the receive data updated on the rising edge of RCLK. Figure 7 is a timing diagram of the
receive data updated on the falling edge of RCLK. The timing specifications are shown in Table 4.
FIGURE 6. RECEIVE DATA UPDATED ON THE RISING EDGE OF RCLK
FIGURE 7. RECEIVE DATA UPDATED ON THE FALLING EDGE OF RCLK
NOTE: VDD=3.3V ±5%, VDDc=1.8V ±5%, TA=25°C, Unless Otherwise Specified
TABLE 4: TIMING SPECIFICATIONS FOR RCLK/RPOS/RNEG
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
RCLK Duty Cycle
RCDU
45
50
55
%
RCLK to Data Delay
RDY
--
40
ns
RCLK Rise Time (10% to 90%) with 25pF Loading
RCLKR
--
40
ns
RCLK Fall Time (90% to 10%) with 25pF Loading
RCLKF
--
40
ns
RCLK
RPOS
or
RNEG
R
DY
RCLK
R
RCLK
F
RCLK
RPOS
or
RNEG
R
DY
RCLK
F
RCLK
R
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