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ZL49200 Dual Channel SLIC
Data Sheet
December 2005
Features
* * * * * * * Transformerless 2 W to 4 W conversion Controls battery feed to line Off-hook and dial pulse detection Ring ground over-current protection Programmable constant current feed -30 V to -72 V battery operation Relay and line driver electronics on board
Ordering Information ZL49200MDC 38 Pin SIL -40C to +85C Trays
Description
The Zarlink ZL49200 Dual SLIC hybrid provides an interface between a switching system and a subscriber loop with 600 impedance. The functions provided by each SLIC include battery feed, 2 W to 4 W conversion, off-hook and dial pulse detection. All driver electronics are included on the hybrid in order to minimize the number of external components required by the user. Loop Length determination table provided on page 9.
Applications
* * * * PABX/ONS/OPS Key Telephone Systems Integrated Access Devices SOHO and Home Gateway
VBAT VDD VEE GND
Tip Drive Controller TIP RING Over-Current Protection circuit
Audio Gain & Network Balance circuit
VX
VR Line Sense 2W to 4W Conversion & Line Impedance VLC Loop Supervision Ring Drive Controller RF RV
C1
SHK Relay Driver VRLY RLYC
RLYD 5v External Electromechanical relay, DPDT/2 Form C C7 100nF, 20% C6 1F, 20%, 16V Ringing Signal C7
C6
GND
Figure 1 - Dual Channel SLIC Single Channel Schematic Diagram 1
Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2004-2005, Zarlink Semiconductor Inc. All Rights Reserved.
ZL49200
Pin Diagram
Data Sheet
RLYC VRLY RLYD VDD GND VEE VBAT I/C TIP RING VLC RF RV I/C GND VX VR C1 SHK
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
SLIC #1
RLYC VRLY RLYD VDD GND VEE VBAT I/C TIP RING VLC RF RV I/C GND VX VR C1 SHK
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
SLIC #2
Power Supply Pin Out Pin Out #1, #2 4, 23 5, 24 15, 34 6, 25 7, 26 11, 30 2, 21 Name VDD GND VEE VBAT VLC VRLY Positive supply rail. +5 V Ground. Return path for +5 V and -5 V. This should also be connected back to the return path for the loop battery, Cap and relay drive ground RLYGND. Negative supply rail. -5 V Battery Voltage for powering the line Reference Voltage (Input). This pin is used to set the subscribers loop constant current. Changing the input voltage sets the current to any desired value within the working limits. Relay voltage source. Voltage source for relay driver. Description
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Zarlink Semiconductor Inc.
ZL49200
Analog I/O Pin Out Pin Out #1, #2 1, 20 3, 22 8, 27 9, 28 10, 29 12, 31 13, 32 14, 33 16, 35 17, 36 18, 37 19, 38 Name RLYC RLYD I/C TIP RING RF RV I/C VX VR C1 SHK Description Relay Control (Input). An active high on this pin will switch RLYD low. Relay Voltage Output. Voltage source used to drive relay coil Internal Connection. Tip. Connects to the TIP lead of the telephone line. Ring. Connects to the RING lead of the telephone line. Ring Feed. Connects to the RING lead via the Ring feed resistor.
Data Sheet
Ring Voltage and Audio Feed. Connects directly to Ring Feed via a relay. Internal Connection. Transmit Audio (Output). This is the 4 W analog signal to the SLIC. Receive Audio (Input). This is the 4 W analog signal to the SLIC. Filter capacitor for ring trip, capacitor connected between this pin and GND. Switch Hook (Output). This pin indicates the line state of the subscribers telephone. The output can also be used for dial pulse monitoring. SHK is high in off-hook state.
Functional Description
The ZL49200 is the analog SLIC for use in a 4 Wire switched system. The SLIC performs all of the normal interface functions between the CODEC or switching system and the analog telephone line such as 2 W to 4 W conversion, constant current feed, switch hook indication, ringing and ring trip detection.
2 Wire to 4 Wire Conversion
The hybrid performs 2 wire to 4 wire conversion by taking the 4 wire signal from an analog switch or voice CODEC, a.c. coupled to VR and converting it to a 2 wire differential signal at tip and ring. The 2 wire signal applied to tip and ring by the telephone is converted to a 4 wire signal VX which is a.c. coupled to the input of the analog switch or voice CODEC.
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Zarlink Semiconductor Inc.
ZL49200
Loop Supervision & Dial Pulse Detection
Data Sheet
The Loop Supervision circuit monitors the state of the phone line and when the phone goes "Off Hook" the SHK pin goes high to indicate this state. This pin reverts to a low state when the phone goes back `On Hook" or if the loop resistance is too high for the circuit to continue to support a constant current feed. The SHK output can also be monitored for dialing information when used in dial pulse system.
Ringing and Ring Trip Detection
Ringing is applied to the line by applying a logic low to the RLYC relay control pin. When an off hook condition is detected, SHK goes high and could be connected to RLYC input to remove ringing.
Constant Current Control
The ZL49200 could be programmed to provide constant current line feed between 18 mA to 26 mA by applying an appropriate DC voltage to VLC input. VLC can be set between 8.75 VDC and -1.25 VDC. The relationship is defined by the equation: ILoop = (VBAT / 1.89 - VLC / 1.25) +/- 2 mA e.g. for VLC =0 V, VBAT = -48 V ILoop = 25 mA +/- 2 mA
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Zarlink Semiconductor Inc.
ZL49200
Application Information
Most PBX applications will have line lengths less than 2 km Most C.O.... applications will have line lengths up to 5 km A single No 22 (AWG) cable is about 250 Ohms/km A PBX operating loop (RLOOP) or ONS will normally be below 1000 Ohms, (incl.... phone). A C.O. operating loop (RLOOP) or OPS could be up to 3000 Ohms (incl.... phone). ONS therefore are normally short loops whilst OPS are normally long loops. This affects the Battery Feed function of the SLIC. There are various parameters that affect the battery feed requirements. Resistance of the line Resistance of the phone Loop current Feed resistor value Line driver voltage drop Battery voltage RL RP ILOOP RF VLD VBAT Maximum limit that you must be capable handling Normally fixed for a particular country Normally fixed for a particular country Fixed in the SLIC design
Data Sheet
Fixed by the product, usually between 8 V to 10 V depending on VBAT Fixed in the system
If we wish to work out what is the maximum Line resistance we can handle we can use the following formulae: RL = {[-VBAT - VLD] / ILOOP} - [RP + 2RF]} Typical values of VLD = 10V, ILOOP = 15 to 30mA, RF = 50 to 300 Ohms and RP = 300 Ohms If we set VBAT = -72V, ILOOP = 18mA,assume the phone is 300 Ohms and use a hybrid with RF = 220 Ohms and VLD =10V like the ZL49200 we get: RL = {[-VBAT - VLD] / ILOOP} - [RP + 2RF] RL = {[72V - 10V)] / 18mA} - [300R + 2x220R] Therefore RL = 2700 Ohms (or RLOOP = 3000 Ohms incl... phone) Equivalent line length = (RL/2) / (250 ohm/km) = 5.4km If we set VBAT = -48V, ILOOP = 18mA,assume the phone is 300 Ohms and use a hybrid with RF = 220 Ohms and VLD =10V like the ZL49200 we get: RL = {[-VBAT - VLD] / ILOOP} - [RP + 2RF]} RL = { [48V - 10V] / 18mA} - [ 300R + 2x220R] Therefore RL = 1371 Ohms (or RLOOP =1671 Ohms incl... phone) Equivalent line length = (RL/2) / (250 ohm/km) = 2.7km
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Zarlink Semiconductor Inc.
ZL49200
Data Sheet
If we set VBAT=-30V, ILOOP = 18mA,assume the phone is 300 Ohms and use a hybrid with RF = 220 Ohms and VLD =9V like the ZL49200 we get: RL = {[-VBAT - VLD] / ILOOP} - [RP + 2RF]} RL = {[30V - 9V] / 18mA} - [300R + 2x220R] Therefore RL = 420 Ohms (or RLOOP =720 Ohms incl... phone) Equivalent line length = (RL/2) / (250 ohm/km) = 0.84km. It can be seen that the battery feed limits the line length that be supported. Low battery voltages are therefore used in PBXs with short loops High battery voltages are used where longer loops are encountered.
Operating loop (RLOOP) Data (including phone) As measured in lab. Loop current (mA) 18 mA 20 mA 22 mA 24 mA 26 mA VBAT = -30 V 750 Ohms 610 Ohms 490 Ohms 390 Ohms 310 Ohms VBAT= -48 V 1600 Ohms 1500 Ohms 1300 Ohms 1100 Ohms 1000 Ohms VBAT = -72 V 3100 Ohms 2700 Ohms 2400 Ohms 2100 Ohms 1900 Ohms
The maximum subscriber loop is a function of loop current, VBAT, wire gauge and the DC resistance of the phone connected at the end of the subscriber loop. The following table will help to determine the optimum combination to achieve maximum subscriber loop in Kilo-feet and Kilo-meter. Note: No 22 (AWG) copper wire is selected for the `local loop' and is about 250 Ohms/Km.
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Zarlink Semiconductor Inc.
ZL49200
RLOOP (Ohms) 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 3100 RL (300 Ohms Phone) Local loop (kft) 1.32 1.98 2.64 3.30 3.96 4.62 5.28 5.94 6.60 7.26 7.92 8.58 9.24 9.90 10.56 11.22 11.88 12.54 13.20 13.86 14.52 15.18 15.84 16.50 17.16 17.82 18.48 Local loop (km) 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0 5.2 5.4 5.6 0.66 1.32 1.98 2.64 3.30 3.96 4.62 5.28 5.94 6.60 7.26 7.92 8.58 9.24 9.90 10.56 11.22 11.88 12.54 13.2 13.86 14.52 15.18 15.84 16.5
Data Sheet
RL (600 Ohms Phone) Local loop (kft) Local loop (km)
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4 4.6 4.8 5.0
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Zarlink Semiconductor Inc.
ZL49200
Recommended Operating Conditions Parameter 1 Operating Supply Voltages * Ringing Voltage Voltage setting for Loop Current Operating Temperature Sym. V DD V EE V BAT Vring VLC To -40 Min. 4.75 -5.25 -72 0 Typ. 5.00 -5.00 -48 50 0V +25 +85 Max. 5.25 -4.75 -30 100 Units V V V V RMS V C
Data Sheet
Test Conditions Note 1
2 3 4
Note 1: Note 2:
Note 2 I LOOP = 25 mA, V BAT = -48 V
Typical figures are at 25C with nominal supply voltages and are for design aid only Power up sequence must be in the following order - Vdd, Vee, Vbat. 16 to 68 Hz superimposed on a V
BAT.
DC Electrical Characteristics Characteristics 1 Supply Current per SLIC * Sym. I DD I EE I BAT ILOOP ILOOP RLOOP SHK Min. -8.5 23 18 1600 750 20 Typ. 5 -3 2 25 Max. 11 Units mA mA mA mA mA mA Test Conditions
On Hook V LC = 0 V V BAT = -48 V With VLC, +/- 2 mA accuracy I LOOP = 18 mA V BAT = -48 V I LOOP = 18 mA V BAT = -30 V V LC = 0 V V BAT = -48 V See Note 3. I LOOP = 25 mA lil = 50 A lih = +50 A Lol = 8 mA Loh = -0.4 mA
2 3 4 5
Constant Current Line Feed Programmable Loop Current Range Operating Loop (Including telephone) Off Hook Detection Threshold RLYC Input Low Voltage Input High Voltage SHK Output Low Voltage Output High Voltage Dial Pulse Distortion ON OFF
27 26
6
Vil Vih Vol Voh
0.4 2.0
0.7
V V V V ms ms
7
0.4 2.7 +4 +4
8
Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. Typical figures are at 25C with nominal +5 V and are for design aid only. Note 3: Off hook detection is related to loop current.
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Zarlink Semiconductor Inc.
ZL49200
AC Electrical Characteristics Characteristics 1 2 3 4 5 6 7 8 9 Ring Trip Detect Time Output Impedance at VX Gain 4-2 @ 1 kHz Gain Relative to 1 kHz Transhybrid Loss Gain 2-4 @ 1 kHz Gain Relative to 1 kHz Return Loss at 2-Wire Total Harmonic Distortion @2W @VX Common Mode Rejection 2 wire to Vx Longitudinal to Metallic Balance Idle Channel Noise @2W @ VX Power Supply Rejection (2 W) Vdd Vee Vbat Power Supply Rejection (Vx) Vdd Vee Vbat RL THD 0.3 0.3 CMR LCL Nc 10 12 PSRR 20 20 20 PSRR 20 20 20 23 23 23 dB dB dB 23 23 23 dB dB dB 15 15 dBrnC dBrnC 35 46 42 55 1.0 1.0 % % dB dB THL -1.3 -0.5 20 18 -1.3 -0.5 20 30 25 20 -1 -0.8 0.5 Sym. Tt Min. Typ. 90 10 -1 -0.8 0.5 Max. 300 Units ms dB dB dB dB dB dB
Data Sheet
Test Conditions
300 Hz - 3400 Hz 300 Hz - 1000 Hz 1000 Hz - 3400 Hz
300 Hz to 3400 Hz 300 Hz - 3400 Hz 3 dBm, 1 kHz @ 2 W 1 Vrms, 1 KHz @ 4 W Input 0.5 Vrms, 1 KHz 200 Hz to 3400 Hz
10 11 13
Cmessage Filter Cmessage Filter 0.1 Vp-p @ 1 kHz
14
15
0.1 Vp-p @ 1 kHz
Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated. Typical figures are at 25C with nominal +5 V and are for design aid only.
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Zarlink Semiconductor Inc.
D
E
A
L f a
SYMBOL A D MILLIMETER MIN ----49.27 ----0.33 4.06 1.22 ----NOM ----49.53 4.58 0.25 0.355 4.45 1.27 1.27 3.81 38 MAX 15.24 53.85 49.79 ----0.38 4.83 1.32 ----MIN ----1.940 ----0.013 0.160 0.048 ----INCH NOM ----1.950 0.180 0.010 0.014 0.175 0.05 0.050 0.150 38 MAX 0.600 2.120 1.960 ----0.015 0.190 0.052 -----
e
b
S D1
Note:
1. Drawing not to scale. 2. Region containing SMT components.
D1 E a b L e f S n
Drawing not to JEDEC Standard defined outline.
c Zarlink Semiconductor 2003 All rights reserved.
Package Code Previous package codes
MD
ISSUE ACN DATE APPRD.
1
N/A
17-Dec-2004
Package Outline for ZL49200 38 Lead SIL Hybrid (53.85x15.24)mm 1.27mm Pitch
108998
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Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries (collectively "Zarlink") is believed to be reliable. However, Zarlink assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Zarlink or licensed from third parties by Zarlink, whatsoever. Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Zarlink, or non-Zarlink furnished goods or services may infringe patents or other intellectual property rights owned by Zarlink. This publication is issued to provide information only and (unless agreed by Zarlink in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user's responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Zarlink's conditions of sale which are available on request.
Purchase of Zarlink's I2C components conveys a licence under the Philips I2C Patent rights to use these components in and I2C System, provided that the system conforms to the I2C Standard Specification as defined by Philips. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright Zarlink Semiconductor Inc. All Rights Reserved.
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