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PDF ZL49200 Data sheet ( Hoja de datos )
| Número de pieza | ZL49200 | |
| Descripción | Dual Channel SLIC | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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ZL49200
Dual Channel SLIC
Data Sheet
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
Applications
• PABX/ONS/OPS
• Key Telephone Systems
• Integrated Access Devices
• SOHO and Home Gateway
December 2005
Ordering Information
ZL49200MDC 38 Pin SIL Trays
-40°C to +85°C
Description
The Zarlink ZL49200 Dual SLIC hybrid provides an
interface between a switching system and a subscriber
loop with 600 Ω 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.
VBAT
VDD VEE GND
TIP
RING
Tip Drive
Controller
Audio Gain & Network
Balance circuit
VX
VR
Line Sense
2W to 4W
Conversion & Line
Impedance
Over-Current
Protection circuit
Ring Drive
Controller
Loop Supervision
RF RV
C1
5v External Electro-
mechanical relay,
DPDT/2 Form C
C7 100nF, 20%
C6 1µF, 20%, 16V Ringing Signal
C7
Relay
Driver
RLYD
C6 GND
VLC
SHK
VRLY
RLYC
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.
1 page  
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
Data Sheet
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
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
5
Zarlink Semiconductor Inc.
5 Page 
For more information about all Zarlink products
visit our Web Site at
www.zarlink.com
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.
TECHNICAL DOCUMENTATION - NOT FOR RESALE
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