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PDF L3000N Data sheet ( Hoja de datos )
| Número de pieza | L3000N | |
| Descripción | SLIC KIT OPTIMIZED | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L3000S
L3092
SLIC KIT OPTIMIZED FOR APPLICATIONS WITH BOTH
FIRST AND SECOND GENERATION COMBOS
PROGRAMMABLE DC FEED RESISTANCE
AND LIMITING CURRENT (25/40/60mA)
LOW ON-HOOK POWER DISSIPATION
(50mW typ)
SIGNALLING FUNCTION (off-hook/GND-Key)
QUICK OFF-HOOK DETECTION IN CVS FOR
LOW DISTORTION (< 1 %) DIAL PULSE DE-
TECTION
HYBRID FUNCTION
RINGING GENERATION WITH QUASI ZERO
OUTPUT IMPEDANCE, ZERO CROSSING IN-
JECTION (no ext. relay needed) AND RING
TRIP DETECTION
ABSOLUTELY NO NOISE INJECTED ON
ADIACENT LINES DURING RINGING SE-
QUENCE
AUTOMATIC RINGING STOP WHEN OFF-
HOOK IS DETECTED
TEST MODE ALLOWS LINE LENGHT MEAS-
UREMENT
PARALLEL LATCHED DIGITAL INTERFACE
LOW NUMBER OF EXTERNAL COMPO-
NENTS WITH STANDARD TOLERANCE
ONLY : 9 1% RESISTORS AND 5 10-20% CA-
PACITORS (for 600 ohm appl.)
POSSIBILITY TO WORK ALSO WITH HIGH
COMMON MODE CURRENTS
GOOD REJECTION OF THE NOISE ON BAT-
TERY VOLTAGE (20dB at 10Hz ; 35dB at
1KHz)
INTEGRATED THERMAL PROTECTION
SURFACE MOUNT PACKAGE (PLCC28 +
PowerSO-20)
-40°C TO 85°C: L3000S/L3092
DESCRIPTION
The SLIC KIT (L3000S/L3092) is a set of solid
state devices designed to integrate many of the
functions needed to interface a telephone line. It
consists of 2 integrated devices ; the L3000S line
interface circuit and the L3092 control unit.
The kit implements the main features of the
BORSHT functions:
- Battery feed (balance mode)
- Ringing Injection
- Signalling Detection
DIP28
ORDERING NUMBER:
L3092N
FLEXIWATT15
ORDERING NUMBER:
L3000SX-VC
PLCC28
ORDERING
NUMBER:
L3092FN
PowerSO20
(slug-up)
ORDERING
NUMBER:
L3000SX
PowerSO20
(slug-down)
ORDERING
NUMBER:
L3000SX-77
- Hybrid Function
The SLIC KIT injects the ringing signal in bal-
anced mode and requires a positive supply volt-
age of typically + 72V to be available on the sub-
scriber card.
The L3000S/L3092 kit generates the ringing sig-
nal internally, avoiding the requirement for expen-
sive external circuitry. A low level 1.5Vrms input is
required. (This can be provided by the combo).
A special operating mode limits the SLIC KIT
power dissipation to 50mW in on-hook condition
keeping the on/off hook detection circuit active.
Through the Digital Interface it is also possible to
set an operating mode that allows measurements
of loop resistance and therefore of line lenght.
This kit is fabricated using a 140V Bipolar tech-
nology for L3000S and a 12V Bipolar I2L technol-
ogy for L3092.
Both devices are available PTH application
(FLEXIWATT15 and DIP28) or SMD application
(PowerSO-20 and PLCC28).
This kit is specially suitable to Private Automatic
Branch Exchange (PABX) and Low Range C.O.
Applications.
December 1997
1/32
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1 page  
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L3000S BLOCK DIAGRAM
L3000S - L3092
L3000S
L3092 BLOCK DIAGRAM
5/32
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L3000S - L3092
Limiting Current
60mA
40mA
25mA
GDK = 0
(0 – 300) ohm
(0 – 650) ohm
(0 – 1300) ohm
GDK = 1
>300 ohm
>650 ohm
>1300 ohm
If, for example, the loop resistance is 400Ω the
GDK output will be 0 only when the limiting current
value is 40 or 25mA.
The card controller can program consecutive Test
Mode and Conversation Mode with different limiting
current in order to individuate the range of loop re-
sistance as shown in the flow chart of fig. 6.
The information of the Loop Resistance Range
can be very useful to optimize the transmission
characteristics of the Line Card to each line.
For example, if a second generation COMBO like
TS5070 is used the Card Controller can use this
information to change the Tx, RX Gains and echo
cancellation characteristics into the programma-
ble COMBO improving the quality of the system.
Figure 6: Procedure for Loop Resistance Evaluation.
11/32
11 Page | ||
| Páginas | Total 32 Páginas | |
| PDF Descargar | [ Datasheet L3000N.PDF ] | |
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