參數(shù)資料
型號: L7554
英文描述: L7554 Low-Power SLIC
中文描述: L7554低功耗用戶接口
文件頁數(shù): 16/28頁
文件大小: 486K
代理商: L7554
16
Lucent Technologies Inc.
Data Sheet
March 1997
L7554 Low-Power SLIC
Applications
(continued)
Design Considerations
Table 11 shows the design parameters of the application circuit shown in Figure 11. Components that are adjusted
to program these values are also shown.
Table 11. 600
Design Parameters
Design Parameter
Parameter Value
Components Adjusted
Loop Closure Threshold
10 mA
R
LCTH
dc Loop Current Limit
40 mA
R
PROG
dc Feed Resistance
183
R
PT
, R
PR
2-wire Signal Overload Level
3.14 dBm
ac Termination Impedance
600
600
R
T1
, R
GP
, R
RCV
Hybrid Balance Line Impedance
R
HB1
Transmit Gain
0 dB
R
T2
, R
X
Receive Gain
0 dB
R
RCV
, R
GP
, R
T1
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