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參數(shù)資料
| 型號(hào)： | XRT83SH38IB-F |
| 廠商： | Exar Corporation |
| 文件頁(yè)數(shù)： | 18/78頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU SH T1/E1/J1 8CH 225BGA |
| 標(biāo)準(zhǔn)包裝： | 84 |
| 類(lèi)型： | 線路接口裝置（LIU） |
| 驅(qū)動(dòng)器/接收器數(shù)： | 8/8 |
| 規(guī)程： | T1，E1，J1 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 安裝類(lèi)型： | 表面貼裝 |
| 封裝/外殼： | 225-BGA |
| 供應(yīng)商設(shè)備封裝： | 225-BGA（19x19） |
| 包裝： | 托盤(pán) |
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XRT83SH38
22
REV. 1.0.7
8-CHANNEL T1/E1/J1 SHORT-HAUL LINE INTERFACE UNIT
The XRT83SH38 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 6 for a typical connection diagram using the internal termination.
FIGURE 6. TYPICAL CONNECTION DIAGRAM USING INTERNAL TERMINATION
3.1.2
CASE 2: Internal Termination With One External Fixed Resistor for All Modes
Along with the internal termination, a high precision external fixed resistor can be used to optimize the return
loss. This external resistor can be used for all modes of operation ensuring one bill of materials. There are
three resistor values that can be used by setting the RxRES[1:0] bits in the appropriate channel register.
Selecting the value for the external fixed resistor is shown in Table 4.
By default, RxRES[1:0] is set to "None" for no external fixed resistor. If an external fixed resistor is used, the
XRT83SH38 uses the parallel combination of the external fixed resistor and the internal termination as the
input impedance. See Figure 7 for a typical connection diagram using the external fixed resistor.
NOTE: Without the external resistor, the XRT83SH38 meets all return loss specifications. This mode was created to add
flexibility for optimizing return loss by using a high precision external resistor.
FIGURE 7. TYPICAL CONNECTION DIAGRAM USING ONE EXTERNAL FIXED RESISTOR
3.2
Clock and Data Recovery
The receive clock (RCLK) is recovered by the clock and data recovery circuitry. An internal PLL locks on the
incoming data stream and outputs a clock that’s in phase with the incoming signal. This allows for multi-
channel T1/E1/J1 signals to arrive from different timing sources and remain independent. In the absence of an
incoming signal, RCLK maintains its timing by using the internal master clock as its reference. The recovered
TABLE 4: SELECTING THE VALUE OF THE EXTERNAL FIXED RESISTOR
RXRES[1:0]
EXTERNAL FIXED RESISTOR
0h (00)
None
1h (01)
240
2h (10)
210
3h (11)
150
R
TIP
R
RING
XRT83SH38 LIU
1:1
Internal Impedance
Line Interface T1/E1/J1
One Bill of Materials
Receiver
Input
R
TIP
R
RING
XRT83SH38 LIU
1:1
Internal Impedance
Line Interface T1/E1/J1
R
R=240
, 210, or 150
Receiver
Input
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相關(guān)代理商/技術(shù)參數(shù) |
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| XRT83SL216 | 制造商:EXAR 制造商全稱(chēng):EXAR 功能描述:16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT |
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| XRT83SL216ES | 功能描述:外圍驅(qū)動(dòng)器與原件 - PCI 16 CH E1 LIU SH 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 |
| XRT83SL216IB | 功能描述:接口 - 專(zhuān)用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)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 |
| XRT83SL216IB-F | 功能描述:接口 - 專(zhuān)用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類(lèi)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 |
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