參數(shù)資料
型號(hào): DS21Q48N
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 44/73頁(yè)
文件大?。?/td> 0K
描述: IC LIU E1/T1/J1 4X 5V LONG144BGA
標(biāo)準(zhǔn)包裝: 90
類型: 線路接口裝置(LIU)
規(guī)程: E1
電源電壓: 4.75 V ~ 5.25 V
安裝類型: 表面貼裝
封裝/外殼: 144-BBGA
供應(yīng)商設(shè)備封裝: 144-PBGA(17x17)
包裝: 管件
DS2148/DS21Q48
49 of 73
Figure 7-1. Basic Interface
NOTES:
1) All resistor values are ±1%.
2) In E1 applications, the Rt resistors are used to increase the transmitter return loss (Table 7-1). No return loss is required for T1
applications.
3) The Rr resistors should be set to 60
each if the internal receive-side termination feature is enabled. When this feature is disabled, Rr
= 37.5
for 75, 60 for 120 E1 systems, or 50 for 100 T1 lines.
4) See Table 7-1 and Table 7-2 for the appropriate transmit transformer turns ratio (N).
RTIP
RRING
TTIP
TRING
Receive
Line
N:1
(larger winding
toward the network)
DS2148
0.47F
(non
polarized)
VDD (21)
VSS (22)
0.1F
VDD (36)
VSS (35)
0.1F
+VDD
0.01F
2.048MHz
(this clock can also
be 1.544MHz for T1
only applications)
MCLK
1:1
0.1F
Rr
Rt
Transmit
Line
10F
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