L8560 Datasheet, PDF (16/46 Pages) Agere Systems – Low-Power SLIC with Ringing

L8560 Low-Power SLIC with Ringing
Data Sheet
April 2000
Electrical Characteristics (continued)
Table 10. Logic Inputs and Outputs
Parameter
Symbol Min Typ Max Unit
Input Voltages:
Low Level (permissible range)
High Level (permissible range)
VIL
–0.5 0.4
0.7
V
VIH
2.0
2.4
VCC
V
Input Currents:
Low Level (VCC = 5.25 V, VI = 0.4 V)
High Level (VCC = 5.25 V, VI = 2.4 V)
IIL
–75 –115 –300
µA
IIH
–40 –60 –100
µA
Output Voltages (open collector with internal pull-up resistor):
Low Level (VCC = 4.75 V, IOL = 360 µA)
VOL
0
0.2
0.4
V
High Level (VCC = 4.75 V, IOH = –20 µA)
VOH
2.4
—
VCC
V
Ring Trip Requirements
s Ringing signal:
— Voltage, minimum 35 Vrms, maximum 100 Vrms.
— Frequency, 17 Hz to 23 Hz.
— Crest factor, 1.4 to 2.
s Ringing trip:
— ≤100 ms (typical), ≤250 ms (VBAT = –33 V, loop
length = 530 Ω).
s Pretrip:
— The circuits in Figure 4 will not cause ringing trip.
200 Ω
TIP
SWITCH CLOSES < 12 ms
6 µF PER TA 909
8 µF PER TR 57
TIP
10 kΩ
RING
RING
2 µF
100 Ω
TIP
RING
12-2572.e (F)
Figure 4. Ring Trip Circuits
16
Lucent Technologies Inc.