The Le88266 Automatic Battery Switching (ABS) VoicePort device 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. 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. Designers benefit by having a simple, cost effective, low-power and dense, interface design without sacrificing features or functionality.The programmable, feature rich VoicePort device provides a highly functional line interface which meets the requirements of short and medium loop (up to 1500 Ohms total at 1 REN) applications.
Feature
- Complete BORSCHT function for 2 channels in a single VoicePort device
- Battery Feed, Over-voltage support, integrated Ringing, line Supervision, Codec, Hybrid (2W/4W), Test
- Integrated Power Management
- Integrated high voltage switching regulator controller
- Wide input voltage range (VSW = +4.75V to +35 V)
- Generates supplies for VBH, VBM & VBL
- Low power Idle and On-hook transmission states
- Worldwide Programmability
- Two-wire AC impedance, Balance Impedance, Gain
- DC feed voltage and current limitRinging frequency, voltage and current limit
- 12 kHz and 16 kHz Metering
- Programmable loop closure and ring trip thresholds
- Ringing
- 5 REN with pin for pin compatible 100-V (Le88266) and 120-V (Le88286) devices
- Up to 110-Vpk internal balanced sinusoidal or trapezoidal ringing with programmable DC offset
- 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 device 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
- External catch diode required
- Small footprint package - Exposed pad 80-pin LQFP
- Minimal external discrete components required
