參數(shù)資料
型號: XRT83VSH28IB-F
廠商: Exar Corporation
文件頁數(shù): 17/75頁
文件大?。?/td> 0K
描述: IC LIU SH E1 OCTAL 225BGA
標(biāo)準(zhǔn)包裝: 84
類型: 線路接口裝置(LIU)
驅(qū)動器/接收器數(shù): 8/8
規(guī)程: T1,E1,J1
電源電壓: 3.14 V ~ 3.47 V
安裝類型: 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
其它名稱: 1016-1482
XRT83VSH28IB-F-ND
XRT83VSH28
21
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
REV. 2.0.0
2.1.2
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 3.
By default, RxRES[1:0] is set to "None" for no external fixed resistor. If an external fixed resistor is used, the
XRT83VSH28 uses the parallel combination of the external fixed resistor and the internal termination as the
input impedance. See Figure 5 for a typical connection diagram using the external fixed resistor.
NOTE: Without the external resistor, the XRT83VSH28 meets all return loss specifications. This mode was created to add
flexibility for optimizing return loss by using a high precision external resistor.
FIGURE 5. TYPICAL CONNECTION DIAGRAM USING ONE EXTERNAL FIXED RESISTOR
TABLE 3: SELECTING THE VALUE OF THE EXTERNAL FIXED RESISTOR
RXRES[1:0]
EXTERNAL FIXED RESISTOR
0h (00)
None
1h (01)
320
2h (10)
280
3h (11)
190
RTIP
RRING
XRT83VSH28 LIU
1:1
Internal Impedance
Line Interface E1
R
R=320
, 280, or 190
Receiver
Input
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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