VE8820
Dual Channel Tracking Battery VoicePort™ Chip Set
Not recommended for new FXS designs.
Use miSLIC Series or ZL880 - Enhanced Dual Channel Wideband FXS Line Interfaces instead.
Overview
| The VE8820 Tracking Battery VoicePort chip Set 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. This chip set reduces system level cost, space, and power. Designers benefit by having a simple, cost effective, low-power and dense, interface design without sacrificing features or functionality. The programmable, feature rich VoicePort chipset provides a highly functional line interface which meets the requirements of short and medium loop (up to 1500 Ohms total) applications. Features include: high voltage switching regulator, self-test, line test capabilities, integrated ringing (up to 140-Vpk), worldwide software programmability with wideband capability, flexible signal generator with tone cadencing, caller ID generation and all BORSCHT functions. These VoicePort chipset features are crucial for designing cost-effective, full-featured Voice over Broadband solutions. |
Detailed Block Diagram
Features & Benefits
- Complete BORSCHT function for 2 channels in a single VoicePort chipset
- Battery Feed, Over-voltage support, integrated Ringing, line Supervision, Codec, Hybrid (2W/4W), Test
- Integrated Power Management
- Integrated high voltage switching regulator controllers
- 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 controllers
- 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
- Ringing
- 5 REN
- Up to 140-Vpk internal balanced sinusoidal or trapezoidal ringing with programmable DC offset
- Unbalanced ringing for PBX trunk compatibility
- Powerful signal generator
- Universal Caller ID generation
- Up to 4 simultaneous tones
- Automatic cadencing feature
- VoicePath API-II Software available to implement FXS functions
- Supports chipset calibration
- Line configuration via VoicePath Profile Wizard
- VeriVoice Test Suite Subscriber Loop Test
- Seamless integration with API-II software
- Utilizes integrated self test capabilities
- Line fault detection and reporting
- Pin selectable PCM/MPI or GCI interface
- G.711 µ-law, A-law, or 16 bit linear coding
- Wideband 16 kHz sampling mode
- Integrated 150 mW 3-V Relay Driver
- Small footprint chipset
- 64-pin TQFP and exposed pad 24-pin QFN
