Product Brief

CX2087x Dolby Headphone Decoder IC
AudioSmart™ Product Brief
A Cost-Effective Dolby Headphone Decoder IC
Product Overview
Key Features
Conexant’s CX2087x device
family provides a turnkey
Dolby headphone and
headset solution. Conexant
provides optimized
implementation of Dolby’s
Digital decoder, Headphone, and Pro Logic IIx
algorithms (royalties applicable).
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Dolby’s headphone technology allows users to simulate
a highly realistic 5.1/7.1 surround sound listening
environment from stereo transducer headphones. The
CX20873 device features an S/PDIF receiver from a
host device, including gaming consoles such as
Microsoft® Xbox and Sony® PlayStation as well as a
USB interface from a PC or MAC. Dolby’s headphone
technology makes the CX20873 an ideal solution for
premium gaming headsets and headphones by
receiving multi-channel digital audio input, and enables
Dolby technologies to run on the CX20873 DSP core.
The CX20873 also features a suite of innovative
Conexant proprietary turnkey audio and voice
processing algorithms designed for the convergence of
audio entertainment and voice communication
applications, such as a gaming console headset, USB
headset, USB docking station, and soundbar.
The device supports multiple digital audio interfaces
such as a full-duplex I2S/PCM, S/PDIF transmit and
receive, and USB2.0 High Speed for receiving and
transmitting up to eight channels of audio data. There
are two on-chip, tri-color PWM LEDs as well as a set of
flexible I/Os that are configurable by an integrated PIC.
Applications
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USB headset and headphones
Docks and soundbar
Conexant Confidential
• www.conexant.com • 011PBR00
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High-speed USB 2.0 device that supports up to
eight endpoints
Quad digital microphone PDM interface
S/PDIF transmitter and receiver
Full-duplex stereo I2S/PCM
Six 32-bit timers/counters
SPI master and slave
I2C master and slave
One UART interface
Dedicated peripheral and memory-to-memory DMAs
Interrupt controller
13 FlexIOs that are fully programmable through a
PIC processor
Two sets of tri-color PWM LED drivers
Six dedicated GPIOs
Debug/JTAG interface and on-chip logic analyzer
On-chip programmable PLLs
Advanced power management that allows the USB
suspend mode to meet 2.3mA using an off-chip
converter 5V/3.3V
Package 116p dual-row QFN
Conexant-proprietary algorithms available for voice
and audio processing
Support for integration of third-party algorithms
(e.g., Dolby’s Digital decoder, Headphone, Pro
Logic, speech recognition, and synthesis)
System Block Diagram
g
g
CX2087x Dolby Headphone Decoder IC | AudioSmart™ Product Brief
Electrical Characteristics
Parameter
Minimum Nominal Maximum Unit
Comments
1.0 V Supply Voltage
–0.4
-
1.02
V
VDD, PSUP_1V0, VDD_SW
1.8 V Supply Voltage
–0.4
-
1.98
V
VDDO_1, VDDO_3, VDDO_4, VDDO_5, VDDO_6, and
VDDO_7
3.3 Supply Voltage
–0.4
-
3.60
V
VDDA3V3, VDDO_1, VDDO_3, VDDO_4,VDDO_5,
VDDO_6, VDDO_7, and PSUP3V3
Storage Temperature Range
–40
-
150
oC
Non-operating temperature
Operating Temperature Range –40
-
85
o
-
Temperature
27
125
oC
Junction temperature
–40
C
Ordering Information
Ordering Number
Part Number
Description
Package
DSAC-L873-11CH
CX20873-11Z
Dolby Headset Decoder IC
9x9 mm2 DRQFN
www.conexant.com
Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614
General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000
© 2014 Conexant Systems, Inc. All rights reserved.
011PBR00