Le5711
Dual Subscriber Line Interface Circuit
VE580 Series
Data Sheet
Features
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•
•
•
•
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Dual-channel SLIC device with small footprint
On-chip Thermal Management (TMG) feature in
Normal and Reverse Polarity
Control states: Active (Normal and Reverse
Polarity), Standby, and Disconnect
On-hook transmission
Low standby power
–39 to –58 V battery operation
Two-wire impedance set by single external
impedance
Device level thermal shutdown
Set on-chip constant-current feed
Programmable ring-trip detect threshold
Only +5 V and battery supply required
the Zarlink QLSLAC™ device, another member of the
VE580 series, combined with the Le5711 device
provides a programmable line circuit that can be
configured for varying requirements.
2.
1.
Document ID#: 081132
Version 5
June 2011
Ordering Information
Le57D111BTC
44-pin eTQFP (Green)
1
Tray
2
The green package meets RoHS Directive 2002/95/EC of the
European Council to minimize the environmental impact of
electrical equipment.
For delivery using a tape and reel packing system, add a "T"
suffix to the OPN (Ordering Part Number) when placing an
order.
Related Literature
Applications
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Ideal for low cost, high performance linecard
applications (CO, DLC)
Meets requirements for countries such as: China,
Korea, Japan, Taiwan, and Australia
Fulfills the following China specifications: GF002-
9002.1
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•
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080753 Le58QL02/021/031 QLSLAC™ Data
Sheet
080754 Le58QL061/063 QLSLAC™ Data Sheet
080748 Le5711 Evaluation Board User’s Guide
TMG
2
DET
2
IREF
DET
1
CAS
C2
2
C1
2
C2
1
C1
1
TMG
1
Description
The innovative Le5711 dual-channel SLIC device is
designed for high-density POTS applications requiring
a small footprint SLIC device with significant power
savings. By combining the line interface of two
channels into one SLIC device, the Le5711 device
enables the design of a low cost, high performance,
and fully programmable line interface for multiple
country applications worldwide. The on-chip Thermal
Management (TMG) feature allows for significantly
reduced power dissipation on the device. The Le5711
device is offered in a space-saving package type, 44-
pin eTQFP. The small footprint of the SLIC device
allows designers to save board space, increasing the
density of lines on the board. The Le5711 device is
also designed to significantly reduce the number of
external components required for linecard design.
Zarlink offers a range of compatible codec/filters that
perform the codec function in a line card. In particular
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2007-2011, Zarlink Semiconductor Inc. All Rights Reserved.
A
2
(TIP)
CH2
2-W
Interface
CH2
Input
Decoder
and Control
CH1
Input
Decoder
and Control
A
1
(TIP)
CH1
2-W
Interface
HP
2
Common
Bias
HP
1
B
2
(RING)
B
1
(RING
CH2
CH2
CH2
CH2
CH1
Signal
Transmission
RSN
2
BGND
2
Signal
Transmission
Power Feed
Controller
Power Feed
Controller
VTX
2
CH1
CH1
CH1
VTX
1
Off-Hook
Detector
Ring Trip
Detector
Ring Trip
Detector
Off-Hook
Detector
RSN
1
BGND
1
Figure 1 - Block Diagram
AGND/
DGND
DB
1
CDC
2
VBAT
CDC
1
VCC
DAC
DB
2
Le5711
Revision History
Below are the changes from the September 2007 version to the June 2011 version.
Data Sheet
Page
1
Item
Ordering Information
Description
Obsoleted Le57D111DJC package.
2
Zarlink Semiconductor Inc.
Le5711
Table of Contents
Data Sheet
1.0 Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.0 Block Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Two-Wire Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Signal Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Power Feed Controller and Common Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Input Decoder and Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Off-Hook Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Ring-Trip Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.0 Connection Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.0 Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.0 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 Operating Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.0 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.1 Transmission Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Crosstalk Between Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.3 Longitudinal Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.4 Insertion Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.5 Line Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.6 Power Supply Rejection Ratio at the Two-Wire Interface, Active Normal State . . . . . . . . . . . . . . . . . . . . 13
6.7 Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.8 Supply Currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.9 RFI Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.10 Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.11 Logic Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.12 Ring-Trip Detector Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.13 Loop Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.14 SLIC Device Decoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.15 User-Programmable Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.16 DC Feed Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.17 Test Circuits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.0 Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.0 Line card Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.0 Physical Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.1 44-Pin eTQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3
Zarlink Semiconductor Inc.
Le5711
List of Figures
Data Sheet
Figure 1 - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Figure 2 - Feed Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 3 - Two-to-Four Wire Insertion Loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 4 - Four-to-Two Wire Insertion Loss and Balance Return Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 5 - Longitudinal Balance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 6 - Two-Wire Return Loss Test Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 7 - RFI Test Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 8 - Le5711 Test Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4
Zarlink Semiconductor Inc.
Le5711
1.0
Product Description
Data Sheet
The Le5711 device is designed for long loop high-density POTS applications requiring a low power, small footprint
SLIC. The Le5711 device increases linecard density by integrating two SLIC devices into a single 32 pin package.
This reduction in board space allows for higher density linecard, which allows for amortizing common hardware
across more channels. The Le5711 device gives linecard designers a simple control interface that supports four
states: Active, Reverse Polarity, Standby, and Disconnect (Ringing). The Le5711 device is low cost and high
performance, providing key features required for POTS markets requiring only loop start. The device includes a
thermal management resistor for reducing power dissipation.
2.0
2.1
Block Descriptions
Two-Wire Interface
The two-wire interfaces provide DC current and send voice signals to a telephone apparatus connected to the
linecard with a two-wire line. The two-wire interface also receives the returning voice signals from the telephone
transmitter.
2.2
Signal Transmission
The RSN input current controls the receive current sent to the two-wire interface. The AC line voltage is sensed by
a differential amplifier between the A
i
(TIP) and HP
i
leads.* The output of this amplifier is equal to the AC metallic
components of the line voltages and is output at VTX
i
. The transmission circuit also contains a longitudinal
feedback circuit to shunt longitudinal signals to a DC bias voltage. The longitudinal feedback does not affect
metallic signals.
*Note:
"i" denotes channel number
2.3
Power Feed Controller and Common Bias
The power feed controllers have three sections: (1) the battery feed circuit, (2) the reverse polarity circuit, and (3)
the common bias circuit. The battery feed circuit regulates the amount of DC current and voltage supplied to the
telephone over a wide range of loop resistance. The reverse polarity circuit provides the capability to reverse the
loop current for pay telephone key pad disable and other applications. The bias circuit provides a filtered reference
voltage, which is offset from the subscriber line voltage, and a signal which sets the current limit.
2.4
Input Decoder and Control
The input decoder and control block provides a means for a microprocessor or SLAC IC to control such system
states as Active, Standby, Disconnect (Ringing), and Reverse Polarity. The input decoder and control block has
TTL-compatible inputs, which set the operating states of the SLIC device. It also provides the supervision signal
sent back to the controller.
2.5
Off-Hook Detector
The most important loop monitoring function is off-hook detection. Loop current is programmed for both channels
by a single resistor. Loop detect threshold is typically 1/3 of the programmed Loop current in the Active and
Reverse Polarity states.
2.6
Ring-Trip Detector
In the Disconnect state, the ring-trip detector is active. While the DB
i
pin is more negative than the DAC pin, the
DET pin will be high to indicate on hook. When an off hook condition occurs, the DB
i
pin becomes more positive
than the DAC pin, and the DET pin will go low to indicate off hook during ringing (ring-trip) has been detected. The
system implements the Ringing state using external control of a ring relay in combination with the Disconnect SLIC
state, which enables the ring-trip detector.
5
Zarlink Semiconductor Inc.
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