參數資料
| 型號： | XRT5894IVTR-F |
| 廠商： | Exar Corporation |
| 文件頁數： | 8/19頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC LIU E1 QUAD 64TQFP |
| 標準包裝： | 1,000 |
| 類型： | 線路接口裝置（LIU） |
| 驅動器/接收器數： | 4/4 |
| 規(guī)程： | E1 |
| 電源電壓： | 3.14 V ~ 3.47 V，4.75 V ~ 5.25 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 64-LQFP |
| 供應商設備封裝： | 64-TQFP（10x10） |
| 包裝： | 帶卷 (TR) |
XRT5894
16
Rev. 1.10
Output Transformer Selection
A 1:2 ratio transformer is recommended for both 75W and 120W operation because the transmitter, when equipped with
this device, meets both the ITU G.703 output pulse amplitude requirement and, the ETSI return loss specification.
Although a center--tapped output transformer is not required, choosing a part with a center-tapped secondary allows the
use of the same type of unit at the receiver input.
A theoretical justification for the 1:2 ratio transformer follows:
Figure 8. Transmitter Line Driver Model
VSpos
VSneg
RSneg
TRING
R4
RL
R3
RSpos
VO
TTIP
1:n
Where:
Vspos = Vsneg = 1.25V typical (Differential line driver peak output voltage swing)
Rspos = Rsneg = 0.8W typical (Differential line driver internal source resistance)
R3 = R4 = 9.1W (Differential line driver external source resistance from Figure 1)
RL = 75W or 120W (Transmitter load resistance)
n = 2 (Transformer turns ratio)
Vo = Transmitter peak output voltage (Measured across RL = 75W or RL = 120W )
Figure 9
may be converted to a single--ended model:
Figure 9. Single-ended Line Driver Model
RL
RSext
RSint
1:n
VO
VS
Where:
VS = ÷Vspos÷ + ÷Vsneg÷
RSint = RSpos + Rsneg
RSext = R3 + R4
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| XRT5897 | 制造商:EXAR 制造商全稱:EXAR 功能描述:Seven-Channel E1 Line Interface |
| XRT5897ES | 功能描述:外圍驅動器與原件 - PCI 7 CH E1 AFE RoHS:否 制造商:PLX Technology 工作電源電壓: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:FCBGA-1156 封裝:Tray |
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