FIGURE 17. " />
參數(shù)資料
型號: XRT83SH314IB
廠商: Exar Corporation
文件頁數(shù): 26/101頁
文件大?。?/td> 0K
描述: IC LIU T1/E1/J1 14CH 304TBGA
標準包裝: 27
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 14/14
規(guī)程: T1,E1,J1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 304-BBGA
供應(yīng)商設(shè)備封裝: 304-PBGA(31x31)
包裝: 托盤
XRT83SH314
26
14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.4
FIGURE 17. TRANSMIT DATA SAMPLED ON RISING EDGE OF TCLK
NOTE: VDD=3.3V ±5%, TA=25°C, Unless Otherwise Specified
3.2
HDB3/B8ZS Encoder
In single rail mode, the LIU can encode the TPOS input signal to AMI or HDB3/B8ZS data. In E1 mode and
HDB3 encoding selected, any sequence with four or more consecutive zeros in the input will be replaced with
000V or B00V, where "B" indicates a pulse conforming to the bipolar rule and "V" representing a pulse violating
the rule. An example of HDB3 encoding is shown in Table 7. In T1 mode and B8ZS encoding selected, an
input data sequence with eight or more consecutive zeros will be replaced using the B8ZS encoding rule. An
example with Bipolar with 8 Zero Substitution is shown in Table 8.
TABLE 6: TIMING SPECIFICATIONS FOR TCLK/TPOS/TNEG
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
TCLK Duty Cycle
TCDU
30
50
70
%
Transmit Data Setup Time
TSU
50
-
ns
Transmit Data Hold Time
THO
30
-
ns
TCLK Rise Time (10% to 90%)
TCLKR
--
40
ns
TCLK Fall Time (90% to 10%)
TCLKF
--
40
ns
TABLE 7: EXAMPLES OF HDB3 ENCODING
NUMBER OF PULSES BEFORE
NEXT 4 ZEROS
Input
0000
HDB3 (Case 1)
Odd
000V
HDB3 (Case 2)
Even
B00V
TCLK
TPOS
or
TNEG
TCLK
F
TCLK
R
T
HO
T
SU
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