VE790 VE790 Series Dual Intelligent Subscriber Line Interface Circuit Le79232

VE790 Series Dual Intelligent Subscriber Line Interface Circuit Le79232 APPLICATIONS DESCRIPTION Enables a cost effective voice

Product VE790 VE790 Series Dual Intelligent Subscriber Line Interface Circuit Le79232 APPLICATIONS DESCRIPTION Enables a cost effective voice solution for long or short loop applications providing POTS and integrated test capabilities - - - - - - CO DLC IVD Voice-enabled DSLAM PBX/KTS Pair gain FEATURES Monitor of two-wire interface voltages and currents supports - Voice transmission - Programmable DC feed characteristics Independent of battery Current limited - Selectable off-hook and ground-key thresholds - Subscriber line diagnostics Leakage resistance Loop resistance Line capacitance Bell capacitance Foreign voltage sensing - Power cross and fault detection Supports external ringing The Le79232 device, in combination with an Le79Q228x SLACTM device, implements the telephone line interface function. This enables the design of a low cost, high performance, fully software programmable line interface for multiple country applications worldwide. All AC, DC, and signaling parameters are fully programmable via microprocessor or GCI interfaces on the Le79Q228x SLAC devices. Additionally, the Le79232 device has integrated selftest and line-test capabilities to resolve faults to the line or line circuit. The integrated test capability is crucial for remote applications where dedicated test hardware is not cost effective. RELATED LITERATURE 081065 Le79228 Quad SLACTM Device Data Sheet 081130 Le79232 Dual ISLICTM Device Data Sheet 081185 Le79252 Dual ISLICTM Device Data Sheet 081123 Le75282 Dual LCAS Device Data Sheet BLOCK DIAGRAM Signal Transmission AD1 3.3 V and battery supplies Dual battery operation for system power saving - Automatic battery switching - Intelligent thermal management Compatible with inexpensive protection networks - Accommodates low tolerance fuse resistors or PTC thermistors Metering capable - 12 kHz and 16 kHz - Smooth polarity reversal Tip-open state supports ground start signaling Integrated test load switch/relay drivers VTX1 SA1 PMG1 VBF1 Two-Wire Interface Longitudinal Control Gain/Level Shift BD1 Attenuator Device Le79232BTC VSAB1 VBL1 IMT1 VBH Signal Conditioning Fault Meas VCC BGND ILG1 VREF AGND RSN2 Signal Transmission AD2 PMG2 An Le79Q228x SLACTM device must be used with this part. VLB1 SB1 VTX2 SA2 ORDERING INFORMATION RSN1 VBF2 Two-Wire Interface Longitudinal Control Gain/Level Shift VLB2 SB2 BD2 Attenuator VSAB2 Package 44-Pin eTQFP VBL2 IMT2 Fault Meas Signal Conditioning ILG2 Document ID# 081242 Date: Sep 27, 2007 Rev: A Version: 2 Distribution: Public Document 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. 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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 license under the Philips I2C Patent rights to use these components in an I2C System, provided that the system conforms to the I2C 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