ZL38070 Datasheet, PDF (1/51 Pages) Zarlink Semiconductor Inc – 256 Channel Voice Echo Canceller

Features
• ZL38070 has eight Echo Voice Processors in a
single BGA package. This single device provides
256 channels of 64 msec echo cancellation or
128 channels at 128 msec echo cancellation
• Each Echo Voice Processor has the capability of
cancelling echo over 32 channels
• Each Echo Voice Processor (EVP) shares the
address bus and data bus with each other
• Fully compliant to ITU-T G.165, G.168 (2000) and
(2002) specifications
• Passed all AT&T voice quality tests for carrier
grade echo canceller
• Sub 50 ms initial convergence times under many
typical network conditions
• Unparalleled in-system tunability
• The ZL38070 provides more than 58% board
space savings when compared with eight
individually packaged Echo Voice Processor
devices
• Each EVP has a Patented Advanced Non-Linear
Processor with high quality subjective
performance
• Each EVP has protection against narrow band
signal divergence and instability in high echo
environments
ZL38070
256 Channel Voice Echo Canceller
Data Sheet
August 2004
Ordering Information
ZL38070GBG 535 Ball BGA
-40°C to +85°C
• Each EVP can be programmed independently in
any mode e.g., Back-to-Back or Extended Delay
to provide capability of cancelling different echo
tails
• Each EVP has +9 to -12 dB level adjusters at all
signal ports (Rin, Sin, Sout and Rout)
• Parallel controller interface compatible with
Motorola microcontrollers
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
Rin1...Rin8
Sin1....Sin8
D0....D7
CS1..CS8
A0..A12
RESET1..RESET8
ZL38070GB
EVP1 EVP2 EVP3
EVP4
EVP5
EVP6 EVP7 EVP8
Rout1..Rout8
Sout1..Sout8
IRQ1..IRQ8
DTA1..DTA8
Figure 1 - ZL38070 Device Overview
1
Zarlink Semiconductor Inc.
Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.
Copyright 2004, Zarlink Semiconductor Inc. All Rights Reserved.