參數(shù)資料
型號(hào): IDT82P5088BBG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 17/81頁
文件大小: 0K
描述: IC LIU T1/E1/J1 OCTAL 256PBGA
標(biāo)準(zhǔn)包裝: 90
功能: 線路接口單元(LIU)
接口: E1,J1,T1
電路數(shù): 8
電源電壓: 1.8V, 3.3V
功率(瓦特): 2.57W
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 256-BGA
供應(yīng)商設(shè)備封裝: 256-PBGA(17x17)
包裝: 托盤
包括: 集成式時(shí)鐘適配器
IDT82P5088
UNIVERSAL OCTAL T1/E1/J1 LIU WITH INTEGRATED CLOCK ADAPTER
FUNCTIONAL DESCRIPTION
24
February 5, 2009
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), Jitter Attenuator,
Decoder and LOS/AIS Detector. Refer to Figure-8.
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, the R_TERM[1:0] bits (TERM, 32H...) can be set to choose 75
,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-9 shows the appropriate external components to connect with
the cable for one channel. Table-16 is the list of the recommended imped-
ance matching for receiver.
Figure-8 Receive Path Function Block Diagram
Figure-9 Transmit/Receive Line Circuit
Table-16 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
Adaptive Equalizer/
Monitor Gain
LOS/AIS
Detector
Data Slicer
Decoder
LOS
RCLK
RDP
RDN
RTIP
Clock and
Data
Recovery
Receive
Internal
termination
RRING
Jitter
Attenuator
A
B
RX Line
RR
TX Line
RT
RTIP
RRING
TRING
TTIP
ID
T82
P5088
(o
ne
of
the
ei
gh
ti
dent
ic
al
links)
VDDAX
D4
D3
D2
D1
1:1
2:1
D6
D5
D8
D7
Cp
VDDAR
Note: 1. Common decoupling capacitor
2. Cp 0-560 (pF)
3. D1 - D8, Motorola - MBR0540T1;
International Rectifier - 11DQ04 or 10BQ060
0.1
F
GNDA
VDDAX
68
F1
3.3 V
0.1
F
GNDA
VDDAR
68
F
3.3 V
1
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