L3030 STMicroelectronics, L3030 Datasheet - Page 6

• Manufacturer Part Number: L3030
• Description: SUBSCRIBER LINE INTERFACE KIT
• Manufacturer: STMicroelectronics

ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
L3000S HIGH VOLTAGE
L3030 LOW VOLTAGE
OPERATING RANGE
L3000S - L3030
FUNCTIONAL DESCRIPTION
L3000S - High Voltage Circuit
The L3000Slineinterfaceprovidesa batteryfeeding
for telephonelines and ringing injection.The IC con-
tains a state decoderthat underexternal controlcan
force the following operational modes : stand-by,
conversation and ringing.
In addition Power down mode can be forced con-
necting the bias current resistor to V
open.
Two pins, I
ning line statuswhich is detectedby sensing the line
current into the output stage.
The L3000S amplifies both the AC and DC signals
entering at pin 6 (VIN) by a factor equal to 40.
Separate grounds are provided :
- Analog ground as a reference for analog signals
- Battery ground as a reference for the output sta-
6/29
V
|V
ges
V
agnd
b
Symbol
Symbol
Symbol
R
R
R
b
–| + |V
– + V
th j-case
T
th j-amb
th j-amb
V
V
V
I
V
V
T
V
V
V
max
oper
T
– V
b
b
stg
b
b
dd
dd
ss
ss
–
+
j
–
+
bgnd
b
b
+
L
+|
andI
Negative Battery Voltage
Positive Battery Voltage
Total Battery Voltage
Positive Supply Voltage
Negative Supply Voltage
Max. Voltage between Analog Ground and Battery Ground
Max. Junction Temperature
Storage Temperature
Thermal Resistance Junction to Case
Thermal Resistance Junction to Ambient
Max. Resistance Junction to Ambient
Operating Temperature Range
Negative Battery Voltage
Positive Battery Voltage
Total Battery Voltage
Positive Supply Voltage
Negative Supply Voltage
Total Line Current (IL + IT)
T
, carryout the information concer-
DD
Parameter
Parameter
Parameter
or leaving it
The two groundshould be shortedtogetherat a low
impedance point.
L3030 - Control Unit
The L3030 low voltage control unit controls L3000S
line interface module, giving the proper information
to set line feed characteristic, to inject ringing and
TTX signal and synthetizes the line and balance im-
pedances. An on chip digital interface allows a mi-
croprocessor to control all the operations. L3030
defines working states of line interface and also in-
forms the card controller about line status.
L3000S - Working States
In order to carry out the different possible opera-
tions, the L3000S has several different working sta-
tes.Each stateis definedby the voltagerespectively
applied by pins 27 and 28 of L3030 to the pins 11
and 12 of L3000S.
Three different voltage levels (– 3, 0, + 3) are avai-
lable at each connection, so defining nine possible
Flexiwatt
+ 4.5
– 5.5
Min.
– 70
Max. 50
Max. 4
0
0
– 55 to + 150
Value
Value
+ 150
– 80
Typ.
– 48
+ 72
140
120
+ 6
– 6
80
80
5
PWSO20
Max. 60
Typ. 2
Max.
+ 5.5
– 4.5
+ 75
– 24
130
70
85
Unit
Unit
Unit
C/W
C/W
C/W
mA
V
V
V
V
V
V
V
V
V
V
V
C
C
C