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L3092N Datasheet

  • L3092N

  • SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...

  • 32頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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L3000N - L3092
6) RINGING MODE
When the ringing function is selected by the con-
trol processor a low level signal (1.5Vrms) with a
frequency in the range from 16 to 70Hz, perma-
nently applied to the L3092 (pin RGIN), is ampli-
fied and injected in balanced mode into the line
through the L3000N with a super imposed DC
voltage of 24V typ.
This low level sinewave can be obtained also
from COMBO connecting RGIN pin to RX
COMBO output with a decoupling capacitor.
The first and the last ringing cycles are synchro-
nized by the L3092 so that the ringing signal al-
ways starts and stops when the line voltage
crosses zero.
When this mode is activated, the L3000N oper-
ates between the negative and the positive bat-
tery voltages typically - 48V and + 72V. The im-
pedance to the line is just equal to the two
external resistors (typ. 100鈩?.
Ring trip detection is performed autonomously by
the SLIC, without waiting for a command from the
control processor, using a patented system which
allows detection during a ringing burst ; when the
off-hook condition is detected, the SLIC stops the
ringing signal and forces the Conversation Mode.
In this condition, if CS = 0V, the output pin ONHK
goes to 0V.
After the detection of the ONHK = 0, the Card
Controller must set the SLIC in Conversation
Mode to remove the internal latching of the
Operating Mode
RNG
Conversation 25mA
Conversation 40mA
Conversation 60mA
Stand-by
Automatic Stand-by
Power-down
Test Mode
Ringing (CVS 25mA)
Ringing (CVS 40mA)
Ringing (CVS 60mA)
0
0
0
0
1
1
0
1
1
1
Input Pin
PWON
1
1
1
0
0
0
0
1
1
1
AUT
1
0
0
0
1
0
1
1
0
0
LIM
X
1
0
X
X
X
X
X
1
0
C1 Comparator Output
1 on-hook
0 off-hook
Disable
0 Limiting Region
1 Resistive Region
Disable
ONHK
1 on-hook
0 off-hook
On/Off hook information.
CONTROL INTERFACE BETWEEN THE SLIC
AND THE CARD CONTROLLER
The SLIC states and functions are controlled by
microprocessor or interface latches of a second
generation combo through seven wires that de-
fine a parallel digital interface.
The seven pins of the digital interface have the
following functions :
- Chip select input (CS)
- Power on/off input (PWON)
- Ring enable input (RNG)
- Automatic SBY input (AUT)
- Limiting current input (LIM)
- On hook/Off hook detection output (ONHK)
- Ground Key detection output (GDK)
The four input pins PWON, RNG, AUT and LIM,
set the status of the SLIC as shown in the follow-
ing table.
The output pin ONHK is equals to 0V when the
line is in OFF hook condition (l
line
> 7,5mA) and is
equal to + 5V when the line is in On hook condi-
tion (I
line
< 5,5mA).
The output pin GDK monitors the ground key
function when the SLIC is in Conversation (CVS)
Mode and the DC operating region (limiting or re-
sistive) in Test (TS) Mode. When the SLIC is in
Conversation (CVS) Mode and I
GDK
(longitudinal
current) > 12mA, pin GDK is set to 0V ;
Output Pin
GDK
1 Ground key not detected.
0 Ground key detected.
Disable
N.B. :
When Ringing Mode is selected, you must choose also which of the three possible Conversation Modes. The SLIC will automatically
select if Off-Hook condition will be detected during ringing.
When I
GDK
< 8mA, pin GDK set to + 5V
The longitudinal current (I
GDK
) is defined as fol-
lows :
I
b
鈭?/div>
I
a
I
GDK
=
2
Where I
a
is the current sourced from pin TIP and
I
b
is the current sunk into pin RING.
The CS input pin allows to connect the I/O pins of
the digital interfaces of many SLIC together.
12/32

L3092N相關型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Subscriber Line Controller
    ETC
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRONICS
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRON...
  • 英文版
    Subscriber Line Controller
    ETC
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRONICS
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRON...
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRONICS
  • 英文版
    SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH FIRST AND SECO...
    STMICROELECTRON...
  • 英文版
    Telecommunication IC
    ETC
  • 英文版
    Telecomm Interface， Other/Special/Misc
    ETC
  • 英文版
    Telecommunication IC
    ETC
  • 英文版
    Telecomm Interface， Other/Special/Misc
    ETC

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