ZL50234
8 Channel Voice Echo Canceller
Data Sheet
March 2006
Features
•
Independent multiple channels of echo
Ordering Information
cancellation; from 8 channels of 64 ms to 4
channels of 128 ms with the ability to mix
channels at 128 ms or 64 ms in any combination
ZL50234/QCC
ZL50234/GDC
100 Pin LQFP Trays
208 Ball PBGA Trays
ZL50234QCG1 100 Pin LQFP* Trays, Bake & Drypack
*Pb Free Matte Tin
•
•
•
•
•
•
Independent Power Down mode for each group of
2 channels for power management
-40°C to +85°C
Fully compliant to ITU-T G.165, G.168 (2000) and
(2002) specifications
•
•
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
Passed AT&T voice quality testing for carrier
grade echo cancellers.
Compatible to ST-BUS and GCI interfaces with
2 Mbps serial PCM data
•
•
•
Offset nulling of all PCM channels
10 MHz or 20 MHz master clock operation
PCM coding, µ/A-Law ITU-T G.711 or sign
3.3 V I/O pads and 1.8 V Logic core operation with
5 V tolerant inputs
IEEE-1149.1 (JTAG) Test Access Port
magnitude
Per channel Fax/Modem G.164 2100 Hz or G.165
2100 Hz phase reversal Tone Disable
•
•
ZL50232, ZL50233, ZL50234 and ZL50235 have
same pinouts in both LQFP and LBGA packages
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•
•
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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
Applications
•
•
•
Voice over IP network gateways
Voice over ATM, Frame Relay
T1/E1/J1 multichannel echo cancellation
V
V
SS
V
DD1 (3.3 V)
DD2 (1.8 V)
ODE
Rin
Sin
Rout
Parallel
Serial
to
to
Serial
Parallel
Echo Canceller Pool
Sout
Group 0
ECA/ECB
Group 1
ECA/ECB
Group 2
ECA/ECB
Group 3
ECA/ECB
Fsel
MCLK
Note:
Refer to Figure 4
for Echo Canceller
block diagram
PLL
C4i
F0i
RESET
Timing
Unit
Microprocessor Interface
Test Port
DS CS R/W A10-A0 DTA D7-D0 IRQ TMS TDI TDO TCK TRST
Figure 1 - ZL50234 Device Overview
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2003-2006, Zarlink Semiconductor Inc. All Rights Reserved.