L7554 AGERE [Agere Systems], L7554 Datasheet - Page 11

• Manufacturer Part Number: L7554
• Description: L7554 Low-Power SLIC
• Manufacturer: AGERE [Agere Systems]

Data Sheet
March 1997
Electrical Characteristics
Table 9. Logic Inputs and Outputs
All outputs except RGDET are open-collector with internal pull-up resistor. RGDET is open-collector without inter-
nal pull-up.
Ring Trip Requirements
Lucent Technologies Inc.
Input Voltages
Input Currents
Output Voltages (open-collector with internal pull-up
Low Level (permissible range)
High Level (permissible range)
Low Level (V
High Level (V
Low Level (V
High Level (V
Ringing signal:
Ringing trip:
Pretrip:
resistor)
— Voltage, minimum 35 Vrms, maximum 100 Vrms.
— Frequency, 17 Hz to 23 Hz.
— Crest factor, 1.4 to 2.
— 100 ms (typical), 250 ms (V
— The circuits in Figure 3 will not cause ringing trip.
length = 530 ).
CC
CC
CC
CC
= 5.25 V, V
= 4.75 V, I
= 5.25 V, V
= 4.75 V, I
Parameter
OL
OH
I
I
= 0.4 V)
= 2.4 V)
= 360 A)
= –20 A)
BAT
(continued)
= –33 V, loop
Symbol
TIP
TIP
TIP
V
V
V
V
I
I
IH
IL
OH
OL
SWITCH CLOSES < 12 ms
IL
IH
Figure 3. Ring Trip Circuits
–0.5
Min
2.0
2.4
—
—
0
2 µF
10 k
L7554 Low-Power SLIC
6 µF
–115
Typ
–60
0.4
2.4
0.2
—
100
200
–200
–100
Max
V
V
0.7
0.4
CC
CC
Unit
RING
RING
RING
12-2572 (C)
V
V
V
V
A
A
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