L9313 Datasheet, PDF (15/40 Pages) Agere Systems – Line Interface and Line Access Circuit Full-Feature SLIC and Ringing for TR-57 Applications

Data Sheet
September 2001
L9313 Line Interface and Line Access Circuit
Full-Feature SLIC and Ringing Relay for TR-57 Applications
Electrical Characteristics (continued)
Ring Trip Detector
Table 5. Ring Trip Detector
Parameter
Min
Typ
Voltage at Input that will Cause Ring Trip After Appropriate
±2.5
±3
Zero Crossings
Voltage at Input that will Cause Immediate Ring Trip
±12
±15
Ringing Source¹:
Frequency (f)
dc Voltage
ac Voltage
19
20
–39.5
—
60
—
Ring Trip (NDET = 0)^{2, 3}:
Loop Resistance
Trip Time
NDET Valid
2000
—
—
—
—
—
Max
±3.5
±18
28
–57
105
—
200
80
Unit
V
V
Hz
V
Vrms
Ω
ms
ms
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. In this case,
bit B3 will always be a 1 when ringing is applied.
b.) The ringing source consists of only the ac voltage (earth-backed ringing); the ringing return is the dc voltage. In this case, bit B3 will
always be a 0 when ringing is applied.
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 kΩ resistor in parallel with an 8 µF capacitor applied across tip and ring.
Agere Systems Inc.
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