ZL38065
32 Channel Voice Echo Canceller with Advanced Noise Matching
Overview
The ZL38065 Voice Echo Canceller implements a cost-effective solution for telephony voice-band echo cancellation conforming to ITU-T G.168 requirements. The ZL38065 architecture contains 16 groups of two echo cancellers (ECA and ECB) which can be configured to provide two channels of 64 milliseconds or one channel of 128 milliseconds echo cancellation. This provides 32 channels of 64 milliseconds to 16 channels of 128 milliseconds echo cancellation or any combination of the two configurations. The ZL38065 supports ITU-T G.165 and G.164 tone disable requirements. |
Simplified Block Diagram
Typical Applications
- Voice-over-IP network gateways
- Voice-over-ATM, Frame Relay
- T1/E1/J1 multichannel echo cancellation
- Wireless base stations
- Echo Canceller pools
Features & Benefits
- From 32 channels of 64 ms to 16 channels of 128 ms with the ability to mix channels at 128 ms or 64 ms in any combination
- 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 systems
- Unparalleled in-system tunability
- Sub 50 ms initial convergence times under typical network conditions
- Fast reconvergence on echo path changes
- Patented advanced non-linear processor with high-quality subjective performance
- Superior noise-matching algorithm
- PCM coding, µ/A-Law ITU-T G.711 or sign magnitude
- Per channel echo canceller parameters control
- Transparent data transfer and mute
- Protection against narrow band signal divergence and instability in high echo environments
- +9 dB to -12 dB level adjusters (3 dB steps) at all signal ports
- Independent Power Down mode for each ECG
- Compatible to ST-BUS and GCI interface at 2 Mbps
- 3.3 V pads and 1.8 V Logic core operation with 5 V tolerant inputs
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Ordering
ECHO Canceller Chip 32-CH G.164/G.165/G.168/G.711 With Tone Detection 100-Pin LQFP Tray
Distributor | SKU | Stock | MOQ | Pkg | |
---|---|---|---|---|---|
Microchip Technology Inc. | .. | .. | .. | .. | Buy Now |
DigiKey | ZL38065QCG1-ND | .. | Tray | No Stock | |
Mouser | 494-ZL38065QCG1 | 1 | Tray | No Stock |