參數(shù)資料
型號: HC55171CB
廠商: INTERSIL CORP
元件分類: 模擬傳輸電路
英文描述: 5 REN Ringing SLIC for ISDN Modem/TA and WLL
中文描述: TELECOM-SLIC, PDSO28
封裝: SOIC-28
文件頁數(shù): 13/18頁
文件大?。?/td> 153K
代理商: HC55171CB
74
Low Level Ringing Interface
The trapezoidal application circuit only requires a cadenced
logic signal applied to the wave shaping RC network to
achieve ringing. When not ringing, the logic signal should be
held low. When the logic signal is low, Tip will be near
ground and Ring will be near battery. When the logic signal
is high, Tip will be near battery and Ring will be near ground.
FIGURE 11. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 1
FIGURE 12. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 2
FIGURE 13. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 3
R
60
59
58
57
56
0
100
200
300
400
500
LOOP IMPEDANCE
R
58
56
54
52
50
0
100
200
300
400
500
LOOP IMPEDANCE
R
58
55
52
49
46
0
100
200
300
400
500
LOOP IMPEDANCE
FIGURE 14. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 4
FIGURE 15. RMS RINGING VOLTAGE vs LOOP LENGTH REN = 5
R
55
52
49
46
43
0
100
200
300
400
500
LOOP IMPEDANCE
R
56
52
48
44
40
0
100
200
300
400
500
LOOP IMPEDANCE
HC55171
相關(guān)PDF資料
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