LE88111
Single Channel FXS 100V VoicePort™
Product is discontinued and not allowed for new designs.
Use miSLIC Series or ZL880 - Enhanced Dual Channel Wideband FXS Line Interfaces instead.
Overview
| The Le88111 VoicePort device implements a single-channel telephone line interface by providing all the necessary voice interface functions from the high voltage subscriber line to the µP/DSP digital interface. 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) applications. Features include: integrated switching regulator, integrated ringing (up to 92-Vpk), worldwide software programmability, flexible signal generator with tone cadencing, caller ID generation and all BORSCHT functions. The VoicePort device features are crucial for designing cost-effective, full-featured Voice over Broadband solutions. |
Detailed Block Diagram
Features & Benefits
- Complete BORSCHT function in a single VoicePort device
- Battery Feed, Over-voltage support, integrated Ringing, line Supervision, Codec, Hybrid (2W/4W), Test
- Small footprint package - Exposed pad 44-pin LQFP
- Minimal external discrete components required
- Integrated Power Management
- Integrated high voltage switching regulator controller
- Wide input voltage range (VSW =+3.3V to +35 V)
- Switching power supply tracks line voltage minimizing active & ringing state power dissipation
- Low power Idle and On-hook transmission states
- Integrated high voltage switching regulator controller
- Ringing
- 5 REN with pin for pin compatible 100-V (Le88111) and 150-V (Le88131) devices
- Up to 140-Vpk internal balanced sinusoidal or trapezoidal ringing with programmable DC offset
- Unbalanced ringing for PBX trunk compatibility (Le88131 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
- 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 (Le88131)
- Integrated 150 mW 3-V or 5-V Relay Driver
Applications
Typical 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
