(China (Mainland))
Product Summary
The LE88221DLL is a dual-channel Automatic Battery Switching (ABS) VoicePort device implements a dualchannel 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. The applications of the LE88221DLL include 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.
Features
LE88221DLL features: (1)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; (2)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; (3)Ringing, 5 REN with pin for pin compatible 100-V (Le88221) and; (4)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); (5)Pin selectable PCM/MPI or GCI interface; (6)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.
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