Figure-15 Transmit Differential Line Inter" />
參數(shù)資料
型號(hào): IDT82P2916BFG
廠(chǎng)商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 66/138頁(yè)
文件大小: 0K
描述: IC LIU T1/E1/J1 16CH SH 484BGA
標(biāo)準(zhǔn)包裝: 84
功能: 線(xiàn)路接口單元(LIU)
接口: E1,J1,T1
電路數(shù): 16
電源電壓: 1.8V, 3.3V
功率(瓦特): 3.10W
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 484-LFBGA
供應(yīng)商設(shè)備封裝: 484-CABGA(19x19)
包裝: 托盤(pán)
包括: AIS 警報(bào)檢測(cè)器和發(fā)生器,回送功能,PRBS 發(fā)生器 / 檢測(cè)器,遠(yuǎn)程檢測(cè)器和發(fā)生器
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IDT82P2916
16-CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
33
April 24, 2010
Figure-15 Transmit Differential Line Interface with
Twisted Pair Cable (with Transformer)
Figure-16 Transmit Differential Line Interface with Co-
axial Cable (with transformer)
Figure-17 Transmit Differential Line Interface with
Twisted Pair Cable (transformer-less, non standard
compliant)
3.3.6.2 Transmit Single Ended Mode
Transmit Single Ended mode can only be used in 75
coaxial cable
applications.
In Transmit Single Ended mode, only Internal Impedance Matching is
supported. Internal Impedance Matching circuit uses an internal
programmable resistor (IM) only. The T_TERM[2:0] bits (b2~0, TCF0,...)
should be set to ‘011’. The output amplitude is 4.74 Vpp when PULS[3:0]
is ‘0001’ and the SCAL[5:0] bits (b5~0, SCAL,...) is ‘100001’.1
In Single Ended mode, special care has to be taken for termination
and overall setup. Refer to separate application note for details.
A 1:2 (step up) transformer should be used in application.
Figure-18 shows the connection for one channel.
Figure-18 Transmit Single Ended Line Interface with
Coaxial Cable (with transformer)
1:2
Rt
TTIPn
TRINGn
IM
6.0 Vpp
Rt
1:2
Rt
TTIPn
TRINGn
IM
4.74 Vpp
Rt
TTIPn
TRINGn
IM
3.0Vpp
In this mode, port protection
should be enhanced.
Note:
1. The waveform in this mode is not standard. However, if the arbitrary wave-
form generator is used, the waveform could pass the template marginally.
1:2
TTIPn
TRINGn
IM
4.74 Vpp
4.7 F
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