參數(shù)資料
型號(hào): XRT83L314
廠商: Exar Corporation
英文描述: 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
中文描述: 14-CHANNEL的T1/E1/J1 LONG-HAUL/SHORT-HAUL線路接口單元
文件頁(yè)數(shù): 31/84頁(yè)
文件大小: 631K
代理商: XRT83L314
XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
REV. 1.0.0
27
N
OTE
:
VDD=3.3V ±5%, T
A
=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 8. 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 9.
T
ABLE
7: T
IMING
S
PECIFICATIONS
FOR
TCLK/TPOS/TNEG
P
ARAMETER
S
YMBOL
M
IN
T
YP
M
AX
U
NITS
TCLK Duty Cycle
T
CDU
30
50
70
%
Transmit Data Setup Time
T
SU
50
-
-
ns
Transmit Data Hold Time
T
HO
30
-
-
ns
TCLK Rise Time (10% to 90%)
TCLK
R
-
-
40
ns
TCLK Fall Time (90% to 10%)
TCLK
F
-
-
40
ns
T
ABLE
8: E
XAMPLES
OF
HDB3 E
NCODING
N
UMBER
OF
P
ULSES
B
EFORE
N
EXT
4 Z
EROS
Input
0000
HDB3 (Case 1)
Odd
000V
HDB3 (Case 2)
Even
B00V
T
ABLE
9: E
XAMPLES
OF
B8ZS E
NCODING
C
ASE
1
P
RECEDING
P
ULSE
N
EXT
8 B
ITS
Input
+
00000000
B8ZS
000VB0VB
AMI Output
+
000+-0-+
Case 2
Input
-
00000000
B8ZS
000VB0VB
AMI Output
-
000-+0+-
相關(guān)PDF資料
PDF描述
XRT83L314IB 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
XRT83L34 QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
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