Lucent Technologies Inc.
7
Data Sheet
October 1998
Relay, and Protector (SRP) for Long Loop and TR-57 Applications
L8574D Resistive Subscriber Line Interface Circuit (SLIC), Ring
Electrical Characteristics
In general, minimum and maximum values are testing requirements. However, some parameters may not be
tested in production because they are guaranteed by design and device characterization. Typical values reflect
the design center or nominal value of the parameter; they are for information only and are not a requirement. Mini-
mum and maximum values apply across the entire temperature range (–40
°
C to +85
°
C) and entire battery range
(–35 V to –60 V). Unless otherwise specified, typical is defined as 25
°
C, V
CCA
and V
DD
= +5.0 V, V
BAT1
and V
BAT2
=
–48 V. Positive currents flow into the device.
Table 2. Operating Conditions and Powering
1. Not to exceed 26 grams of water per kilogram of dry air.
2. Includes current in all external resistors per Figure 15.
3. This parameter is not tested in production. It is guaranteed by design and device characterization.
4. V
BAT1
and V
BAT2
power supply rejection depends on the battery noise cancellation circuit. The performance stated here applies to V
BAT2
only
during the talk state and V
BAT1
only during the on-hook transmission state and assumes proper battery noise cancellation (see Figure 5).
Parameter
Min
–40
5
Typ
—
—
Max
85
95
1
Unit
°
C
%RH
Temperature Range
Humidity Range
Supply Voltages:
V
CCA
V
DD
V
BAT1
V
BAT2
V
CCA
– V
DD
Supply Currents (scan state; no loop current)
2
:
I
VCCA
+ I
VDD
(+5 V)
I
VBAT1
(–48 V) + I
VBAT2
(–48 V)
Supply Currents (talk or on-hook transmission state; no loop current)
2
:
I
VCCA
+ I
VDD
(+5 V)
I
VBAT1
(–48 V) + I
VBAT2
(–48 V)
Total Power Dissipation (no loop current)
2
(V
CCA
and V
DD
= +5 V; V
BAT1
and V
BAT2
= –48 V):
Talk or On-hook Transmission State
Scan State
Power Supply Rejection (Tip/Ring)
3
:
V
CCA
(500 Hz—3 kHz; 50 mVrms ripple)
V
DD
(500 Hz—3 kHz; 50 mVrms ripple)
V
BAT2
and V
BAT1
(500 Hz—2 kHz; 50 mVrms ripple)
4
V
BAT2
and V
BAT1
(2 kHz—3 kHz; 50 mVrms ripple)
4
Thermal
3
:
Thermal Resistance (still air)
Operating T
jc
Thermal Shutdown Temperature
4.6
4.6
–42.5
–20
—
5.0
5.0
–48
–48
—
5.5
5.5
–60
V
BAT1
±
0.5
V
V
V
V
V
—
—
—
—
3.0
–825
mA
μ
A
—
—
—
—
6.0
–4.5
mA
mA
—
—
—
—
240
55
mW
mW
40
50
40
35
50
—
—
40
—
—
—
—
dB
dB
dB
dB
—
—
—
—
—
145
60
135
—
°
C/W
°
C
°
C