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Numéro de référence | ZL50234GD | ||
Description | 8 Channel Voice Echo Canceller | ||
Fabricant | ETC | ||
Logo | |||
1 Page
ZL50234
8 Channel Voice Echo Canceller
Data Sheet
Features
• Independent multiple channels of echo
cancellation; from 8 channels of 64ms to 4
channels of 128ms with the ability to mix
channels at 128ms or 64ms 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 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, µ/A-Law ITU-T G.711 or sign
magnitude
• Per channel Fax/Modem G.164 2100Hz or 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
March 2003
Ordering Information
ZL50234/QCC 100-Pin LQFP
ZL50234/GDC 208-Ball LBGA
-40°C to +85°C
• 0 dB to -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
• ZL50232, 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
• Wireless base stations
• Echo Canceller pools
• DCME, satellite and multiplexer system
VDD1 (3.3V)
VSS
VDD2 (1.8V)
ODE
Rin
Sin
MCFLseKl
C4i
F0i
Serial
to
Parallel
PLL
Timing
Unit
Echo Canceller Pool
Parallel
to
Serial
Group 0
ECA/ECB
Group 1
ECA/ECB
Group 2
ECA/ECB
Group 3
ECA/ECB
Note:
Refer to Figure 4
for Echo Canceller
block diagram
Microprocessor Interface
Test Port
Rout
Sout
RESET
DS CS R/W A10-A0 DTA D7-D0 IRQ TMS TDI TDO TCK TRST
Figure 1 - ZL50234 Device Overview
1
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Pages | Pages 30 | ||
Télécharger | [ ZL50234GD ] |
No | Description détaillée | Fabricant |
ZL50234GD | 8 Channel Voice Echo Canceller | ETC |
ZL50234GDC | 8 Channel Voice Echo Canceller | ETC |
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