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L3000N 데이터시트 PDF




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부품번호 L3000N 기능
기능 SLIC KIT OPTIMIZED
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L3000N 데이터시트, 핀배열, 회로
www.DataSheet4U.com
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.




L3000N pdf, 반도체, 판매, 대치품
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L3000S - L3092
PIN DESCRIPTION (L3092)
N° Name
Description
1 VOUT Two wire unbalanced output carryng out the following signals reduced by 40:
1) DC voltage to perform the proper DC characteristic.
2) Ringing Signal
3) Voice Signal
2 RPC AC line Impedance Adjustment Protection Resistances Compensation
3 TX Transmit Amplifier Output
4 COMP Comparator Input. This is the input comparator that senses the line voltage in power down and in
automatic stand-by, allowing off hook detection in this mode.
5
AUT
Aut. Input. It is a part of the digital interface. Loaded when CS is low.
6 MR Master Reset Input. When it is connected to ground the SLIC is forced in power down. It has an
internal pull-up. (typ. 200K) (*)
7 PWON Power on/power off input. This input is part of digital interface. Loaded when CS is low.
8 RING Ring Enable Input. This input is part of the digital interface. Loaded when CS is low.
9 CS Chip Select Input.
10 GDK Ground Key Output Enabled by CS Low.
11 ONHK On Hook/off Hook Output Enabled by CS Low.
12 C2 State control Signal 2.
13 C1 State Control Signal 1. Combination of C1 and C2 define operating mode of the high voltage part.
14 RGIN Low Level Ringing Signal Input.
15 CRT Ring Trip Detection
16 IL Longitudinal Line Current Input
IL = Ib Ia
100
17 RDC DC Feeding System
18 IT Transversal Line Current Input
IT =
Ia + Ib
100
19 ACDC AC - DC Feedback Input.
20 VDD Positive Supply Voltage, +5V.
21 REF Bias Setting Pin.
22 VSS Negative Supply Voltage, -5V.
23 GND Analog and Digital Ground.
24 LIM Limiting Current Selection Input. Loaded when CS is low.
25 PDO Power Down Output. Driving the high voltage part L3000S through the bias resistor RH.
26 ZB TX Amplifier Negative Input performig the two to four wire conversion. In case of application with
2nd Generation COMBO performing also the echo cancellation (ex TS5070/5071), this pin must
be connected to GND.
27 CAC AC Feedback Input.
28 ZAC AC Line Impedance Synthesis.
(*) Must be connected to a proper capacitor for power on reset or to VDD if not used. Should not be left open.
4/32

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L3000N 전자부품, 판매, 대치품
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L3000S - L3092
Table 1.
Pin 12 of L3092 Pin 12 of L3000S (C2)
+3 0 –3
Pin 13 of L3092
+3 Stand-by
Conversation
Not Used
(C1)
0 Not Used B.B Not Used
Pin 11 of L3000S –3 Not Used
Ringing
Not Used
c) Ringing (RING)
d) Boost Battery (BB),(see Appendix B).
The fifth status, Power down (PD), is set by the
output pin PDO of the L3092 that disconnect the
Bias Resistor, RH, of L3000S from ground.
The main difference between Stand-by and
Power down is that in SBY the power consump-
tion on the voltage battery VB– (– 48V) is reduced
but the L3000S DC Feeding and monitoring cir-
cuits are still active, in PD the power consumption
on VB- is reduced to zero, and the L3000S is
completely switched off.
SLIC OPERATING MODES
Through the L3092 Digital Interface it is possible to
select six different SLIC OPERATING MODES :
1) Conversation or Active Mode (CVS)
2) Stand - By Mode (SBY)
3) Power - Down Mode (PD)
4) Automatic Stand - By Mode (ASBY)
5) Test Mode (TS)
6) Ringing Mode (RNG)
1) CONVERSATION (CVS) OR ACTIVE MODE
This operating mode is set by the control proces-
sor when the Off hook condition has been recog-
nized,
As far as the DC Characteristic is concerned two
different feeding conditions are present :
a) Current limiting region : the DC impedance of
the SLIC is very high (> 20K) and therefore the
system works like a current generator. By the
L3092 Digital Interface it is possible to selects the
value of the limiting current.:
60mA, 40mA or 25mA.
b) A standard resistive feeding mode : the charac-
teristic is equal to a battery voltage (VB-) minus
5V, in series with a resistor, whose value is set by
external components (see external component list
of L3092).
Switching between the two regions is automatic
without discontinuity, and depends on the loop re-
sistance. The SLIC AC characteristics are guar-
anteed in both regions.
Fig. 1 shows the DC characteristic in conversa-
tion mode.
Fig. 2 shows the line current versus loop resis-
tance for two different battery values and RFS =
200.
The allowed maximum loop resistance depends
on the values of the battery voltage (VB), on the
RFS and on the value of the longitudinal current
(IGDK). With a battery voltage of 48V, RFS = 200
and IGDK = 0mA, the maximum loop resistance is
over 3000and with IGDK = 20mA is about
2000(see Application Note on maximum loop
resistance for L3000S/L3092 SLIC KIT).
In conversation mode the AC impedance at the
line terminals is synthetized by the external com-
ponents ZAC and RP, according to the following
formula :
ZML
=
ZAC
25
+
2
RP
Depending the characteristic of the ZAC network,
ZML can be either a pure resistance or a complex
impedance. This allows for ST SLIC to meet dif-
ferent standards as far as the return loss is con-
cerned. The capacitor CCOMP guarantees stabil-
ity to the system.
The two to four wire conversion is achieved by
means of a circuit that can be represented as a
Wheatstone bridge, the branches of which being:
1) The line impedance (Zline).
2) The SLIC impedance at line terminals (ZML).
3) The balancing network ZA connected between
RX input and ZB pin of L3092.
4) The network ZB between ZB pin and ground
that shall copy the line impedance.
It is important to underline that ZA and ZB are not
equal to ZML and to Zline. They both must be
multiplied by a factor in the range of 10 to 25, al-
lowing use of smaller capacitors.
In case the L3000S/L3092 kit is used with a second
generation programmable COMBO (EG
TS5070FN) which is able to perform the two to four
wire conversion, the two impedances ZA and ZB
can be removed and the ZB pin connectedto GND.
The -6dB Tx gain of the L3000S/L3092SLIC kit in
fact allows to keep the echo signal always within
the COMBO Hybrid Balance Filter dynamic range.
In conversation mode, the L3000S dissipates
about 250mW for its own operation. The dissipa-
tion related to the current supplied to the line shall
be added, in order to get the total dissipation.
7/32

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