參數(shù)資料
型號(hào)： L9312
英文描述： Line Interface and Line Access Circuit Forward Battery SLIC and Ringing Relay for TR-57 Applications
中文描述： 線路接口和線路接入電路轉(zhuǎn)發(fā)電池SLIC和振鈴繼電器的訓(xùn)練班- 57應(yīng)用
文件頁(yè)數(shù)： 14/40頁(yè)
文件大?。?/td> 709K
代理商： L9312
Data Sheet
July 2001
Forward Battery SLIC and Ringing Relay for TR-57 Applications
L9312 Line Interface and Line Access Circuit
14
Agere Systems Inc.
Electrical Characteristics
(continued)
Ring Trip Detector
Table 5. Ring Trip Detector
1. The ringing source may be either of the following:
a.) The ringing source consists of the ac and dc voltages added together (battery-backed ringing); the ringing return is ground.
b.) The ringing source consists of only the ac voltage (earth-backed ringing); the ringing return is the dc voltage.
2. NDET must also indicate ring trip when the ac ringing voltage is absent (<5 Vrms) from the ringing source.
3. Pretrip ringing must not be tripped by a 10 k
resistor in parallel with an 8 μF capacitor applied across tip and ring.
Parameter
Min
±2.5
Typ
±3
Max
±3.5
Unit
V
Voltage at Input that will Cause Ring Trip After Appropriate
Zero Crossings
Voltage at Input that will Cause Immediate Ring Trip
Ringing Source
1
:
Frequency (f)
dc Voltage
ac Voltage
Ring Trip (NDET = 0)
2, 3
:
Loop Resistance
Trip Time
NDET Valid
±12
±15
±18
V
19
–39.5
60
20
—
—
28
–57
105
Hz
V
Vrms
2000
—
—
—
—
—
—
200
80
ms
ms
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