144-pin LQFP
22 mm
22 mm
IC dimensions
(pin-to-pin nominal)
New CobraNet™ Silicon Series Ideal for Digital Audio Networking Applications
Highly Integrated Solution Reduces Component Count and Implementation Costs
Audio manufacturers can now easily incorporate
the industry standard digital audio networking
technology into their product designs. CobraNet
technology, from Cirrus Logic®, is available in
the new CS1810xx Silicon Series, featuring
three highly integrated ICs that provide 2, 8
or 16 simultaneous channels of audio input
and output at either 48-kHz or up to 96-kHz
sample rates. The Silicon Series includes the
key CobraNet circuitry needed to integrate
high-quality, cost-effective audio networking
capability into a wide range of products.
The CS1810xx provides multiple 16, 20 or
24-bit audio connections across an Ethernet
network. In fact, two-way audio control and
monitoring is possible at any point along the
network. In conjunction with an external
VCXO, the ICs deliver a studio-grade,
low-jitter clock source and the CS1810xx
also supports dual-Ethernet connections for
“mission-critical” applications.
Featuring a high-speed parallel host port
interface, the CS1810xx allows optional
connection to a host processor as well as
offering Ethernet-based control, monitoring,
CS1810xx Features
• Silicon Series supports 2, 8, or
16 bi-directional audio channels
• Reduces power consumption
• Reduces cost
• Reduces design effort
• Supports 96 and 48 kHz sampling rates
• Selectable latency of 1.33, 2.66, or
5.33 ms across network
• 32-bit synchronous serial digital audio I/O
and management via industry standard SNMP.
Firmware can be easily updated over Ethernet
using TFTP or via the host interface. Additional
control and monitoring functions are also
provided by the innovative, built-in
Asynchronous or packet-bridge functions.
Now available on low-cost ICs without
licensing or royalty fees, the industry standard
CobraNet technology can be easily integrated
into new and existing networked-audio
applications. Contact your local Cirrus Logic
sale representative or visit
for details.
CobraNet Technology Advantages
• Parallel host control
• Asynchronous serial control transport
• Supports FLASH memories and Ethernet
• Complies fully with Power-Over-Ethernet
(POE) standards
• Supports low-jitter external audio clock
• Available in 144-pin LQFP
• Available as low-cost ICs without licensing
or royalty fees
• CobraNet technology can coexist with data
traffic over existing Ethernet networks,
saving money by eliminating additional
infrastructure costs
• De-facto industry standard with tens-ofthousands of installed nodes in high-profile
“mission-critical” venues worldwide
• Networked audio, control and monitoring
• Uses SNMP for control and monitoring
• Incorporates multiple fault-tolerant features
• Ability to send audio from any CobraNet
interface to any other – unlimited
addressing, unlimited capacity
Software Tools
The Silicon Series of processors, along with
the included firmware, implements a fully
functional CobraNet-compliant interface.
In addition, Cirrus Logic offers a variety of
utility programs and documentation support
to assist our developers in successfully
creating and launching CobraNet technologybased products.
• CobraCad – is an application used to model
CobraNet network topologies. Simply point,
click, drag, and drop and CobraCad will verify that the CobraNet network configuration
will perform as intended. This tool is ideal for
end users installing systems with CobraNet
• CobraNet Discovery – is a utility program
used to provide valuable feedback regarding
the working state of a CobraNet network.
The program reads and displays operational
statistics from every CobraNet interface on
the network. It can also be used to assign
addresses to individual CobraNet devices
and to update CobraNet firmware.
• CobraNet Object Tools (COT) – is a
Microsoft® COM object library that can be
used with a variety of software languages or
scripting systems. COT provides all of the
low-level functionality needed to configure
and monitor CobraNet devices, greatly
easing the development effort required to
write custom CobraNet applications.
• Other Resources – Cirrus Logic has
additional software tools available for use
in manufacturing and test environments.
Reference designs and many helpful
application notes are also available.
The CobraNet Silicon Series processors and
its firmware and software tools are available
today with the full support that comes from the
worldwide Cirrus Logic sales and applications
engineering teams.
CobraNet technology has a proven track
record, with years of successful deployments
and tens-of-thousands of nodes in use
today. This solid track record, along with
the cost-effective CobraNet Silicon Series
of processors now available, makes the
selection of CobraNet technology an easier
choice than ever.
Application Examples
Facility audio distribution
Paging stations
Power amplifiers
Audio snakes
Signal processors
Part No.
Mixing consoles
Self-powered loudspeakers
Ceiling speakers
Microphone pre-amplifiers
Media servers
Stand-alone A/D and D/A interfaces
Serial Audio In
Serial Audio Out
* These ICs can be made available in lead-free packaging and/or industrial grade.
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Product Bulletin 0090-1004-PB-LP © 2004 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, and Leading the Digital
Entertainment Revolution are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.