Product
VE880 Series
Dual Channel Wide band Automatic Battery Switching (ABS) VoicePort™ Device
Le88226/246
APPLICATIONS
Voice enabled Cable and DSL Modems
Voice over IP/ATM - Integrated Access Devices (IAD)
Smart Residential Gateways (SRG) and Routers
Media Terminal Adapters (MTA)
Standalone & Embedded
Fiber to the User/Premise/Home (FTTH/P/H), Fiber in
the Loop (FITL) Optical Network Terminals (ONT)
Wireless Local Loop (WLL), PBX, ISDN NT1/TA
Set-Top Box, Home Side Box
ORDERING INFORMATION
Device
Le88226DLC
Le88246DLC
Package
80-pin eLQFP (Green package*)
*Green package meets RoHS Directive 2002/95/EC of the European
Council to minimize the environmental impact of electrical equipment.
DESCRIPTION
The
dual-channel wide band Le88226/246 Automatic
Battery Switching (ABS) VoicePort™ device implements a
dual-channel telephone line interface by providing all the
necessary voice interface functions from the high voltage
subscriber line to the µP/DSP digital interface. The ABS device
can operate from external battery supplies, or from supplies
generated by the on chip switching regulator controllers. This
device reduces system level cost, space, and power by
achieving the highest level of voice integration possible.
Designers benefit by having a simple, cost effective, low power
and dense, interface design without sacrificing features or
functionality. The programmable, feature rich VoicePort devices
provide a highly functional line interface which meets the
requirements of short and medium loop (up to 1500 Ohms total
at 1 REN) applications. Features include: high voltage
switching regulator, self-test, line test capabilities, integrated
ringing (up to 110-Vpk), worldwide software programmability,
flexible signal generator with tone cadencing, caller ID
generation and all BORSCHT functions. These VoicePort
device features are crucial for designing cost-effective, full-
featured Voice over Broadband solutions.
FEATURES
Complete BORSCHT function in a single VoicePort
TM
device for two channels
—
Battery
Feed,
Over-voltage
support, integrated
Ringing,
line
Supervision, Codec, Hybrid
(2W/4W),
Test
— Small footprint package - Exposed pad 80-pin LQFP
— Minimal external discrete components required
Integrated Power Management
— Integrated high voltage switching regulator controllers
– Wide input voltage range (VSW =+3.3V to +35 V)
– Generates supplies for VBH, VBM & VBL
— Low power Idle and On-hook transmission states
Ringing
— 5 REN with pin for pin compatible 100-V (Le88226) and
120-V (Le88246) devices
— Up to 110-Vpk internal balanced sinusoidal or
trapezoidal ringing with programmable DC offset
— Unbalanced ringing for PBX trunk compatibility
(Le88246 device)
Pin selectable PCM/MPI or GCI interface
Worldwide Programmability
— Two-wire AC impedance, Balance Impedance, Gain
— DC feed voltage and current limit
— Ringing frequency, voltage and current limit
— 12 kHz and 16 kHz Metering
— Programmable loop closure and ring trip thresholds
G.711 µ-law, A-law, or 16 bit linear coding
Wide band 16 kHz sampling mode
Powerful signal generator
— Universal Caller ID generation
— Up to 4 simultaneous tones
— Automatic cadencing feature
Subscriber Loop Test/Self Test support
— Comprehensive line sensing
— Integrated self test capabilities
— Line fault detection and reporting
— Test load switch (Le88246)
Integrated 150 mW 3-V or 5-V Relay Driver
VOICEPORT™ DEVICE BLOCK DIAGRAM
VBL VBM VBH
TIPD
1
TIPT
1
RINGT
1
RINGD
1
TAC
1
RAC
1
RTV
1
LFC
1
RSN
1
IHL
1
TDC
1
RDC
1
PCLK/DCL
FS/FSC
GCI Interface
(GCI)
DXA/DU
DRA/DD
High Voltage
Line Driver
PLL
Voice Signal
Processing
Signaling
Control
Supervision
Processing
Signal
Generation
Signal
Generation
PCM Interface
and Time Slot
Assigner
(PCM)
Input / Output
4
TSCA
I/O2
i
- I/O1
i
DCLK/S0
DIN/S1
DOUT
CS/PG
INT/S2
RST
SWCMPY
SWVSY
SWISY
SWOUTY
SWCMPZ
SWVSZ
SWISZ
SWOUTZ
XB
RDC
2
TDC
2
IHL
2
RSN
2
LFC
2
RTV
2
RAC
2
TAC
2
RINGD
2
RINGT
2
TIPT
2
TIPD
2
Supervision
Processing
Signaling
Control
Voice Signal
Processing
Microprocessor
Interface
(MPI)
Switching
regulator
controllers
High Voltage
Line Driver
Analog
Reference
VBL VBM VBH
VREF
IREF
.
Document ID#
081347
Date:
Rev:
A
Version:
Distribution:
Public Document
Sep 28, 2007
2
Le88226/246
Product
FEATURES
• Highest level of integration
• Smallest footprint
• Saves board space
BENEFITS
• Reduces system BOM and discrete component count
• Pin-compatible options
• Provides design flexibility to develop one design and
populate the voice socket with the right features for a given
market—100 V or 120 V, narrow band or wide band,
internal balanced (sinusoidal or trapezoidal) or
unbalanced ringing
• Provides best solution for battery-backed and power-
sensitive applications
• Offers design flexibility to develop one application for
worldwide markets
• Reduces real-time software overhead
• Enables high performance 909 diagnostics and subscriber
loop test and self test support
• Enables lowest component count and highest efficiency in
all states of operation
• Lowest power solution across all operating modes
• Highly programmable
• Integrated ring cadencing and system state control
• Comprehensive line sensing
• Integrated switching regulator
Related Literature
081265 - Le88221/241 Dual-Channel ABS Narrow band VoicePort Device Data Sheet*
081307- Le88226/246 Dual-Channel ABS Wide band VoicePort™ Device Data Sheet*
081206 - Le88116/136 Single-Channel Tracking Battery Wide Band VoicePort™ Device Data Sheet*
081315 - Le88216/236 Dual-Channel Tracking Battery Wide Band VoicePort™ Device Data Sheet*
Le71HR0824 - VE880 Series Line Module (Supports 2FXS ABS up to 120-V ringing with a 12-V Flyback Automatic
Battery Switching Power Supply
*Contact your
Sales Representative to obtain the data sheet.
Packaging and Availability
See
Ordering Information
on first page.
For More Information:
To find the
Sales Office nearest you, visit our website at:
2
Zarlink Semiconductor Inc.
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 I
2
C components conveys a license under the Philips I
2
C Patent rights to use these components in an I
2
C System, provided that the system
conforms to the I
2
C Standard Specification as defined by Philips.
Zarlink, ZL, the Zarlink Semiconductor logo and the Legerity logo and combinations thereof, VoiceEdge, VoicePort, SLAC, ISLIC, ISLAC and VoicePath are
trademarks of Zarlink Semiconductor Inc.
TECHNICAL DOCUMENTATION - NOT FOR RESALE
TI Technology Forum
京公网安备 11010802033920号
EEWORLD
