参数资料
型号: IDT82P2828BHG
厂商: IDT, Integrated Device Technology Inc
文件页数: 80/154页
文件大小: 0K
描述: IC LIU T1/J1/E1 28+1CH 640-PBGA
标准包装: 5
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: 640-BGA 裸露焊盘
供应商设备封装: 640-PBGA-EP(31x31)
包装: 托盘
其它名称: 82P2828BHG
IDT82P2828
28(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
31
February 6, 2009
Figure-10 Receive Differential Line Interface with
Twisted Pair Cable (transformer-less, non standard
compliant)
3.2.1.2 Receive Single Ended Mode
Receive Single Ended mode can only be used in 75
coaxial cable
applications.
In Receive Single Ended mode, only External Impedance Matching is
supported. External Impedance Matching circuit uses an external
resistor (Rr) only. The value of the resistor is 18.75
(see Figure-11 for
details) when the single end is connected with a 2:1 transformer or is 75
(see Figure-12 for details) when the single end is connected without a
transformer.
In Receive Single Ended mode, the RIM pin should be left open and
the configuration of the R_TERM[2:0] bits (b2~0, RCF0,...) is ignored.
Figure-11 Receive Single Ended Line Interface with Co-
axial Cable (with transformer)
Figure-12 Receive Single Ended Line Interface with Co-
axial Cable (transformer-less, non standard compliant)
IM
6.0Vpp
RTIPn
RRINGn
Rr/2
VCOM1
10 F
1. Two Rr/2 resistors should be connected to VCOM[1:0] that are
coupled to ground via a 10
F capacitor, which provide 60
common mode input resistance.
2. In this mode, lightning protection should be enhanced.
3. The maximum input dynamic range of RTIP/TRING pin is
-0.3 V ~3.6 V (in line monitor mode it is -0.3 V ~ 2 V)
Note:
VCOM0
2:1
Rr
RTIPn
RRINGn
4.74 Vpp
470 nF
IM
Rr2
RTIPn
RRINGn
4.74 Vpp
470 nF
Rr1
Rr = Rr1 + Rr2 = 75
In this mode, port protection should be enhanced.
Note:
IM
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