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PRODUCT
PREVIEW
TM
VE880 Series
Dual Channel Automatic Battery Switching (ABS) VoicePortTM Device
LE88221/241
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 LE88221DLC Le88241DLC 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
Legerity's dual-channel LE88221/241 Automatic Battery Switching (ABS) VoicePortTM device implements a dualchannel telephone line interface by providing all the necessary voice interface functions from the high voltage subscriber line to the P/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 costeffective, full-featured Voice over Broadband solutions.
FEATURES
Complete BORSCHT function in a single VoicePortTM 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 (LE88221) and 120-V (Le88241) devices -- Up to 110-Vpk internal balanced sinusoidal or trapezoidal ringing with programmable DC offset -- Unbalanced ringing for PBX trunk compatibility (Le88241 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 -law, A-law, or 16 bit linear coding 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 - Loop supervision, AC/DC faults -- Test load switch (Le88241) Integrated 150 mW 3-V or 5-V Relay Driver Pin-compatible wide band version available (16-kHz sampling mode)
VOICEPORTTM DEVICE BLOCK DIAGRAM
VBL VBM VBH TIPD1 TIPT 1 RINGT1 RINGD1 TAC1 RAC1 RTV1 LFC1 RSN1 IHL1 TDC1 RDC1 PCLK/DCL FS/FSC GCI Interface (GCI) PCM Interface and Time Slot Assigner (PCM) Input / Output
4
High Voltage Line Driver Voice Signal Processing Signaling Control Supervision Processing Signal Generation Signal Generation
PLL
DXA/DU DRA/DD
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TSCA I/O2i - I/O1i DCLK/S0 DIN/S1 DOUT CS/PG INT/S2 RST SWCMPY SWVSY SWISY SWOUTY SWCMPZ SWVSZ SWISZ SWOUTZ XB
RDC2 TDC2 IHL2 RSN2 LFC2 RTV2 RAC2 TAC2 RINGD2 RINGT2 TIPT 2 TIPD2
Supervision Processing Signaling Control Voice Signal Processing High Voltage Line Driver
Microprocessor Interface (MPI)
Switching regulator controllers
Analog Reference VREF IREF
VBL VBM VBH
The information in this document is Preliminary and may be changed in whole or in part without notice. Legerity makes no guarantee that the device(s) described herein will ever be considered for commercialization or mass production. If you are considering using the proposed device(s) or doing any related design work, please call a Legerity sales representative for current information. Legerity, the Legerity logo, and combinations thereof, and VoicePort are trademarks of Legerity, Inc. All other brand and product names are used for identification only and may be trademarks of their respective companies.
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Document ID# 081199 Date: Rev: A Version: Distribution: Public Document
Mar 7, 2005 1
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PRODUCT
PREVIEW
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 powersensitive 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 www..com
* 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 VoicePortTM Device Data Sheet* 081206 - Le88116/136 Single-Channel Tracking Battery Wide Band VoicePortTM 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 Legerity Sales Representative to obtain the data sheet.
Packaging and Availability
See Ordering Information on first page.
For More Information:
To find the Legerity Sales Office nearest you, visit our website at: www.legerity.com/contact/ To download or order data sheets, application notes, or evaluation tools, go to: www.legerity.com/literature/ For all other technical inquiries, please contact Legerity Tech Support at: techsupport@Legerity.com or call +1 512.228.5400
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Legerity provides system solutions that accelerate the deployment of integrated voice and data networks. By combining semiconductor design expertise and advanced process technology with global applications support, Legerity develops voice and data IC solutions that enhance the performance, increase the density, reduce the power and lower the system cost of communication equipment products. In addition to providing chip sets for voice applications, Legerity offers IC solutions for Voice Over Broadband (VoB) and Integrated Voice + Data, as well as line drivers and transceivers for broadband equipment. Legerity is headquartered in Austin, Texas with offices throughout North America, Europe and Asia.
Legerity Inc. * 4509 Freidrich Lane * Austin, TX * 78744-1812
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512.228.5400 www.legerity.com
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