Details, datasheet, quote on part number: ZL50232QCC
PartZL50232QCC
CategoryCommunication => Telephony => Echo Cancellation
DescriptionDescription = 32 Channel Voice Echo CANceller ;; Package Type = Pbga ;; No. Of Pins = 208
CompanyZarlink Semiconductor
DatasheetDownload ZL50232QCC datasheet
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Features, Applications

Independent multiple channels of echo cancellation; from 32 channels to 16 channels of 128ms with the ability to mix channels 64ms in any combination Independent Power Down mode for each group of 2 channels for power management Fully compliant to ITU-T 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 2Mb/s serial PCM coding, /A-Law ITU-T G.711 or sign magnitude Per channel Fax/Modem G.165 2100Hz 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 Ordering Information ZL50232QC 100-Pin LQFP ZL50232GD 208-Ball LBGA to +85C

-12 dB level adjusters (3 dB steps) at all signal ports Offset nulling of all PCM channels 10 MHz or 20 MHz master clock operation 3.3 V pads and 1.8V Logic core operation with 5-Volt tolerant inputs IEEE-1149.1 (JTAG) Test Access Port

Applications

Voice over IP network gateways Voice over ATM, Frame Relay T1/E1/J1 multichannel echo cancellation Wireless base stations Echo Canceller pools DCME, satellite and multiplexer system

Note: Refer to Figure 4 for Echo Canceller block diagram

Zarlink Semiconductor Inc. Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc. Copyright 2003, Zarlink Semiconductor Inc. All Rights Reserved.

Description

The ZL50232 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation conforming to ITU-T G.168 requirements. The ZL50232 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 ZL50232 supports ITU-T G.165 and G.164 tone disable requirements







 

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