STLC3080 STMicroelectronics, STLC3080 Datasheet - Page 4

• Manufacturer Part Number: STLC3080
• Description: IC INTERFACE LINE SUBSCRB 44TQFP
• Manufacturer: STMicroelectronics

Specifications of STLC3080

• Function: Subscriber Line Interface Concept (SLIC)
• Number Of Circuits: 1
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 5.5mA
• Power (watts): 1.1W
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 44-LQFP
• Includes: Automatic Activation Mode, BORSCHT Functions, Ring Trip Detection, Slave Mode
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

STLC3080
CONTROL INTERFACE
Slave mode (MODE=Low).
A parallel interface allow to control the operation
of STLC3080 through a control bus:
- D0 D1 D2 latched input bits defining the Slic
- R0 R1 latched input bits (active High) drive the
- DET and GDK/AL , tri-state outputs, signal the
-CSIN: chip select for input bits, active Low,
- CSOUT: chip select for output bits ; active Low ,
D0 D1 D2 R0 R1 CSIN and CSOUT inputs are
provided with a 15 A pull-down current to prevent
uncontrolled conditions in case the control bus
goes floating.
According to the above table, 8 operating modes
can be set:
1) Power-Down.
2) Stand-By.
3) Active N.P.
4) Active R.P.
5) Ringing (with SLIC Active N.P.).
6) Ringing (with SLIC Active R.P.).
7) Ground start.
8) High Impedance Feeding.
Power-Down
It’s an idle state characterised by a very low
power consumption; any functionality is disabled;
only
proper setting of bits R0 and R1.
It can be set during out of service periods just to
4/23
operation mode
test relays.
status of the loop: On/Off-Hook and Ground-Key.
Pin GDK/AL goes low also when the device
thermal protection is activated or a line fault (Tip to
Ring, Tip and/or Ring to Ground or VBAT) is
detected (flowing current 7.5mA).
strobes the data present on the control bus into
the internal latch.
when high DET and GDK/AL goes tri-state.
0/1
R0
X
X
X
X
X
X
X
X
X
relays Rel0 and Rel1 can be driven by
0/1
R1
X
X
X
X
X
X
X
X
X
INPUTS
D0
X
X
0
0
0
0
1
1
1
1
D1
X
X
0
0
1
1
0
0
1
1
D2
X
X
0
1
0
1
0
1
0
1
Power down
Stand-by
Active N.P.
Active R.P.
Ringing (with SLIC Active N.P.)
Ringing (with SLIC Active R.P.)
Ground start
High Impedance Feeding
Rel 0 (on = 1, off = 0)
Rel 1 (on = 1, off = 0)
OPERATING MODE
reduce the power consumption.
It is worth noticing that two other conditions can
set the Slic in idle state but with some differences
as reported in the table:
Stand-By.
Mode selected in On-Hook condition when high
immunity to common mode currents is needed for
the DET bit.
To reduce the current consumption, AC feedback
loop is disabled and only DET and GDK/AL de-
tectors are active.
DC current is limited at 16mA (not programma-
ble); feeding characteristic shown in fig. a.
The voltage drop in on-hook condition is 7.8V.
Figure a: STLC3080 DC Characteristic in
Active
Mode selected to allow voice signal transmission.
When in ACTIVE mode the voltage drop in on-
hook condition is 7.8V in order to allow proper on-
hook transmission (Fig. b).
I
Power Down
Idle State
Thermal
Reset
Alarm
16mA
Stand-By Mode.
D98TL307
Rel0/1 Drive
Disable
Enable
Enable
def by D0-D2
def by D0-D2
(Active Low)
ring/trip
ring/trip
disable
off/hk
off/hk
off/hk
off/hk
off/hk
DET
Disable
Disable
OUTPUTS
DET
Low
V
BAT
R
FEED
-7.8V
def by D0-D2
def by D0-D2
(Active Low)
= 2R
GDK/AL
gnd-key
gnd-key
gnd-key
gnd-key
disable
disable
disable
disable
GDK/AL
Disable
Disable
P
Low
V