Details, datasheet, quote on part number: ZL50234GDC
PartZL50234GDC
CategoryCommunication => Telephony => Echo Cancellation
DescriptionDescription = 8 Channel Voice Echo CANceller ;; Package Type = Pbga ;; No. Of Pins = 208
CompanyZarlink Semiconductor
DatasheetDownload ZL50234GDC datasheet
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Features, Applications

Independent multiple channels of echo cancellation; from 8 channels to 4 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 AT&T voice quality testing for carrier grade echo cancellers. Compatible to ST-BUS and GCI interfaces with 2Mb/s serial PCM data 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 Ordering Information ZL50234/QCC 100-Pin LQFP ZL50234/GDC 208-Ball LBGA +85 C Protection against narrow band signal divergence and instability in high echo environments -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 I/O pads and 1.8V Logic core operation with 5-Volt tolerant inputs IEEE-1149.1 (JTAG) Test Access Port ZL50233, ZL50234 and ZL50235 have same pinouts in both LQFP and LBGA packages

Applications

Voice over IP network gateways Voice over ATM, Frame Relay T1/E1/J1 multichannel echo cancellation

ECA/ECB 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.

Wireless base stations Echo Canceller pools DCME, satellite and multiplexer system
Description

The ZL50234 Voice Echo Canceller implements a cost effective solution for telephony voice-band echo cancellation conforming to ITU-T G.168 requirements. The ZL50234 architecture contains 4 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 8 channels of 64 milliseconds to 4 channels of 128 milliseconds echo cancellation or any combination of the two configurations. The ZL50234 supports ITU-T G.165 and G.164 tone disable requirements.







 

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