ZL50233
4 Channel Voice Echo Canceller
Overview
| The ZL50233 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation conforming to ITU-T G.168 requirements. The ZL50233 architecture contains 2 groups of two echo cancellers (ECA and ECB). This provides 4 channels of 64 milliseconds or 2 channels of 128 milliseconds echo cancellation or any combination of the two configurations. The ZL50233 supports ITU-T G.165 and G.164 tone disable requirements |
Simplified Block Diagram
Typical Applications
- Wireless Local Loop base stations and controllers
- Voice telephony gateways
- Digital, IP based and wireless PBX systems
- Echo Canceller pools
- Customer Premise equipment
- Integrated access devices and SOHO gateways
Features & Benefits
- Independent multiple channels of echo cancellation; from 4 channels of 64 ms to 2 channels of 128 ms with the ability to mix channels at 128 ms or 64 ms in any combination
- Independent Power Down mode for each group of 2 channels for power management
- Fully compliant to ITU-T G.165, G.168 (2000) and (2002) specifications
- Passed all AT&T voice quality tests for carrier grade echo canceller.
- Compatible to ST-BUS and GCI interface at 2 Mbps serial PCM
- PCM coding, µ/A-Law ITU-T G.711 or sign magnitude
- Per channel Fax/Modem G.164 2100 Hz or G.165 2100 Hz phase reversal Tone Disable
- Per channel echo canceller parameters control
- Transparent data transfer and mute
- Fast reconvergence on echo path changes
- Fully programmable convergence speeds
- Patented Advanced Non-Linear Processor with high quality subjective performance
- Protection against narrow band signal divergence and instability in high echo environments
- Pin for Pin compatible with the 8, 16 and 32 channel devices
Resources
Documentation
Application Notes
- ZLAN-56 - Voice Echo Canceller (Frequently Asked Questions)
- ZLAN-54 - VEC Register Tuning Information (ZL502xx & MT93Lxx)
Product Previews
Downloads, Firmware and Drivers
- BSDL Files:
- ZL50233GD BSDL
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Ordering
ECHO Canceller Chip 4-CH G.165/G.168/G.711 With Tone Detection 100-Pin LQFP Tray - Trays
| Distributor | SKU | Stock | MOQ | Pkg | |
|---|---|---|---|---|---|
| Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
| Digi-Key | ZL50233QCG1-ND | 90 | Tray | No Stock | |
| Mouser | 494-ZL50233QCG1 | 80 | 1 | Tray | Buy Now |
