参数资料
型号: IDT82V2084PF
厂商: IDT, Integrated Device Technology Inc
文件页数: 13/75页
文件大小: 0K
描述: IC LIU T1/J1/E1 4CH 128-TQFP
标准包装: 15
类型: 线路接口装置(LIU)
规程: E1
电源电压: 3.13 V ~ 3.47 V
安装类型: 表面贴装
封装/外壳: 128-LQFP
供应商设备封装: 128-TQFP(14x20)
包装: 托盘
其它名称: 82V2084PF
20
INDUSTRIAL
TEMPERATURE RANGES
QUAD CHANNEL T1/E1/J1 LONG HAUL/SHORT HAUL LINE INTERFACE UNIT
3.3
RECEIVE PATH
The receive path consists of Receive Internal Termination, Monitor
Gain,Amplitude/WaveShapeDetector,DigitalTuningController,Adaptive
Equalizer, Data Slicer, CDR (Clock and Data Recovery), Optional Jitter
Attenuator, Decoder and LOS/AIS Detector. Refer to Figure-7.
3.3.1
RECEIVE INTERNAL TERMINATION
The impedance matching can be realized by the internal impedance
matching circuit or the external impedance matching circuit. If R_TERM[2]
is set to ‘0’, the internal impedance matching circuit will be selected. In this
case, theR_TERM[1:0]bits(TERM, 1AH...)canbesettochoose75
,100
, 110 or 120 internal impedance of RTIPn/RRINGn. If R_TERM[2]
is set to ‘1’, the internal impedance matching circuit will be disabled. In this
case, the external impedance matching circuit will be used to realize the
impedance matching.
Figure-8 shows the appropriate external components to connect with
the cable for one channel. Table-15 is the list of the recommended imped-
ance matching for receiver.
Figure-7 Receive Path Function Block Diagram
Figure-8 Transmit/Receive Line Circuit
Table-15 Impedance Matching for Receiver
Cable Configuration
Internal Termination
External Termination
R_TERM[2:0]
RR
R_TERM[2:0]
RR
E1/75
000
120
1XX
75
E1/120
001
120
T1
010
100
J1
011
110
Monitor Gain
Adaptive
Equalizer
LOS/AIS
Detector
Data Slicer
Decoder
LOS
RCLK
RDP
RDN
RTIP
Clock
and Data
Recovery
Receive
Internal
termination
RRING
Jitter
Attenuator
RX Line
RR
TX Line
RT
RTIPn
RRINGn
TRINGn
TTIPn
ID
T8
2V
20
84
One of the Four Identical Channels
VDDTn
D4
D3
D2
D1
1:1
2:1
A
B
D6
D5
D8
D7
Cp
VDDRn
2
3
0.1 F
GNDTn
VDDTn
68 F1
3.3 V
0.1 F
GNDRn
VDDRn
68 F
3.3 V
1
Note: 1. Common decoupling capacitor
2. Cp 0-560 (pF)
3. D1 - D8, Motorola - MBR0540T1;
International Rectifier - 11DQ04 or 10BQ060
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