參數(shù)資料
型號(hào)： XRT83VSH28
廠商： Exar Corporation
英文描述： 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
中文描述： 8路E1短途線路接口單元
文件頁(yè)數(shù)： 23/74頁(yè)
文件大小： 574K
代理商： XRT83VSH28
PRELIMINARY
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH28
20
REV. P1.0.0
2.0
RECEIVE PATH LINE INTERFACE
The receive path of the XRT83VSH28 LIU consists of 8 independent E1 receivers. The following section
describes the complete receive path from RTIP/RRING inputs to RCLK/RPOS/RNEG outputs. A simplified
block diagram of the receive path is shown in
Figure 3
.
F
IGURE
3. S
IMPLIFIED
B
LOCK
D
IAGRAM
OF
THE
R
ECEIVE
P
ATH
2.1
Line Termination (RTIP/RRING)
2.1.1
CASE 1: Internal Termination
The input stage of the receive path accepts standard E1 twisted pair or E1 coaxial cable inputs through RTIP
and RRING. The physical interface is optimized by placing the terminating impedance inside the LIU. This
allows one bill of materials for all modes of operation reducing the number of external components necessary
in system design. The receive termination impedance is selected by programming TERSEL[1:0] to match the
line impedance. Selecting the internal impedance is shown in
Table 2
.
The XRT83VSH28 has the ability to switch the internal termination to "High" impedance by programming
RxTSEL in the appropriate channel register. For internal termination, set RxTSEL to "1". By default, RxTSEL
is set to "0" ("High" impedance). For redundancy applications, a dedicated hardware pin (RxTSEL) is also
available to control the receive termination for all channels simultaneously. This hardware pin takes priority
over the register setting if RxTCNTL is set to "1" in the appropriate global register. If RxTCNTL is set to "0", the
state of this pin is ignored. See
Figure 4
for a typical connection diagram using the internal termination.
F
IGURE
4. T
YPICAL
C
ONNECTION
D
IAGRAM
U
SING
I
NTERNAL
T
ERMINATION
T
ABLE
2: S
ELECTING
THE
I
NTERNAL
I
MPEDANCE
TERSEL[1:0]
R
ECEIVE
T
ERMINATION
0h (00)
Reserved
1h (01)
Reserved
2h (10)
75
3h (11)
120
HDB3 Decoder
Rx Jitter
Attenuator
Clock & Data
Recovery
Peak Detector
& Slicer
RTIP
RRING
RCLK
R
TIP
R
RING
XRT83VSH28 LIU
1:1
Internal Impedance
Line Interface E1
One Bill of Materials
Receiver
Input
相關(guān)PDF資料
PDF描述
XRT83VSH28IB 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH314 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH314IB 14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
XRT83VSH316IB 16-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XRT83VSH28ES 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 8 CH E1 LIU SH (low cost version) RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT83VSH28IB 功能描述:接口 - 專用 8 Ch T1/E1 Framer RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59
XRT83VSH28IB-F 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 8 Channel 1.8V-3.3V temp -45 to 85C RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray
XRT83VSH28IB-F 制造商:Exar Corporation 功能描述:T1/E1 LIU IC
XRT83VSH314 制造商:EXAR 制造商全稱:EXAR 功能描述:14-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
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