ZL50234GD ETC, ZL50234GD Datasheet
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ZL50234GD
Manufacturer Part Number
ZL50234GD
Description
8 Channel Voice Echo Canceller
Manufacturer
ETC
Datasheet
1.ZL50234GD.pdf
(41 pages)
Features
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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,
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
MCLK
Fsel
Rin
C4i
Sin
F0i
/A-Law ITU-T G.711 or sign
Parallel
Timing
Serial
PLL
Unit
to
V
DD1 (3.3V)
DS CS R/W A10-A0 DTA D7-D0
ECA/ECB
Group 0
Microprocessor Interface
Figure 1 - ZL50234 Device Overview
Echo Canceller Pool
ECA/ECB
Group 1
V
SS
ECA/ECB
Group 2
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Applications
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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
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
IRQ
8 Channel Voice Echo Canceller
V
DD2 (1.8V)
TMS
ECA/ECB
Group 3
ZL50234/GDC 208-Ball LBGA
ZL50234/QCC 100-Pin LQFP
TDI TDO TCK TRST
Test Port
Ordering Information
Note:
Refer to Figure 4
for Echo Canceller
block diagram
-40 C to +85 C
Parallel
Serial
ODE
to
Data Sheet
Rout
Sout
RESET
ZL50234
March 2003
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