ETC BT852

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Bt852
Digital Video Encoder
High Performance and Low Cost
for a Wide Range of Video Systems
High performance video combined with the right set of features make
Conexant’s Bt852 a versatile device for most video systems. High
quality 9-bit DACs provide the clear, lifelike video required for modern
satellite and cable television set-top boxes, VCD and Super VCD players,
PC add-in cards, video conferencing systems and digital cameras.
Power conservation modes extend portable system battery life and
help to reduce system heating. Automatic mode detection and
switching (in slave mode) are included for simple programming of
the Bt852 outputs. The output section of the Bt852 contains current
output DACs which require minimal external passive components to
provide the best flexibility,functionality and video performance — all
for a very low system design cost.
Flexible, Easy to Use Digital Video Encoder
The Bt852 is designed specifically for VideoCD, Super VCD, video
Distinguishing Features
games and other digital video systems which require the conversion
of digital YCrCb (MPEG) data to analog NTSC/PAL video. The device
supports a glueless interface with most popular MPEG decoder ICs.
• 2x oversampling simplifies
external filtering
Worldwide video standards are supported, including NTSC (N.
America, Japan) PAL-B, D, G, H, I (Europe, Asia), PAL-M (Brazil), PAL-N
(Uruguay, Paraguay), and PAL-Nc (Argentina). Current output DACs
• Master or slave video timing
• Interlaced and noninterlaced operation
provide sufficient output current to meet the requirements of any
consumer video system. In addition, the device supports a switchable setup pedestal for use with NTSC applications in Japan.
• Automatic mode detection/switching
in slave mode
• On-board voltage reference
• Extremely compact 32-pin TQFP package
features
and
specifications
Further Information
literature@conexant.com
1-800-854-8099 (North America)
33-14-906-3980 (International)
DI.PB19 98-5843
Digital Infotainment
Printed in USA
China
Phone: (86 2) 6361 2515
Fax: (86 2) 6361 2516
Web Site
www.conexant.com
India
Phone: (91 11) 692 4780
Fax: (91 11) 692 4712
Hong Kong
Phone: (852) 2827 0181
Fax: (852) 2827 6488
World Headquarters
Bt852 functional block diagram
The composite analog video signal is output simultaneously onto two outputs.
This allows one output to provide baseband composite video while the other
drives an RF modulator. Analog luminance (Y) and chrominance (C) information
Conexant Systems, Inc.
4311 Jamboree Road
P. O. Box C
Newport Beach, CA
92658-8902
Phone: (949) 483-4600
Fax: (949) 483-6375
is available for interfacing to S-video equipment. As a slave, the Bt852
automatically detects the input data formats (PAL/NTSC, CCIR601/ square
pixel, interlaced/noninterlaced) and switches internally to provide the proper
format on the outputs. This feature, along with the on-board voltage reference
and single clock interface, makes the Bt852 extremely simple to use. In
addition, the use of a 2x oversampling on-chip simplifies external filter design
resulting in reduced overall system cost.
U.S. Florida/South America
Phone: (727) 799-8406
Fax: (727) 799-8306
U.S. Los Angeles
Phone: (805) 376-0559
Fax: (805) 376-8180
U.S. Mid-Atlantic
Phone: (215) 244-6784
Fax: (215) 244-9292
Multiple Video Outputs
for Televisions of All Varieties
The Bt852 provides analog luminance (Y) and chrominance (C) information
in the Y and C outputs for interfacing with S-video equipment. Composite
(CVBS) information is available on the two channels when S-video outputs
are not required. The selection between S-video and CVBS outputs is
U.S. North Central
Phone: (630) 773-3454
Fax: (630) 773-3907
U.S. Northeast
Phone: (978) 692-7660
Fax: (978) 692-8185
determined by setting the SVIDEO pin high or low, respectively.
U.S. Northwest/Pacific West
Phone: (408) 249-9696
Fax: (408) 249-7113
Implementation
The Bt852 is packaged in a 32-pin Thin Quad Flat Pack (TQFP) with a 7.0 x
7.0 mm body size. It requires only a minimum of discrete passive support
components for external filtering. It is ideal for low cost, high performance
video systems and consumer electronics.
Product Features
Applications
• 8-bit 4:2:2 YCrCb inputs for glueless interface
to MPEG decoders
• Digital satellite television receivers
• NTSC/PAL/PAL-M/PAL-Nc (Argentina)
composite video outputs
• Digital and analog cable television receivers
• CVBS or S-video outputs
• Portable VCD and Super VCD players
• 5V supply voltage
• Digital cameras
• CCIR 601 or square pixel operation
• PC add-in cards with TV output
• 2x oversampling simplifies external filtering
• PC video editing cards
• 9-bit DACs
• Karaoke/video game appliances
(DBS/DVB/DSS)
• VCD players / Super VCD players
• Master or slave video timing
• Interlaced and noninterlaced operation
Related Products
• Automatic mode detection/switching
in slave mode
• Bt856/857
• Bt860/861
• Bt864A/865A
• Bt866/867
• On-board voltage reference
U.S. South Central
Phone: (972) 733-0723
Fax: (972) 407-0639
U.S. Southeast
Phone: (919) 858-9110
Fax: (919) 858-8669
U.S. Southwest
Phone: (949) 483-9119
Fax: (949) 483-9090
APAC Headquarters
Conexant Systems Singapore,
Pte. Ltd.
1 Kim Seng Promenade
Great World City
#09-01 East Tower
Singapore 237994
Phone: (65) 737 7355
Fax: (65) 737 9077
• Bt868/869
• Extremely compact 32-pin TQFP package
Conexant and the Conexant symbol are trademarks of Conexant Systems, Inc.
Australia
Phone: (61 2) 9869 4088
Fax: (61 2) 9869 4077
Korea
Phone: (82 2) 565 2880
Fax: (82 2) 565 1440
Europe Headquarters
Conexant Systems France
Les Taissounieres B1
1681 Route des Dolines
BP 283
06905 Sophia Antipolis Cedex
France
Phone: (33 4) 93 00 33 35
Fax: (33 4) 93 00 33 03
Europe Central
Phone: (49 89) 829 1320
Fax: (49 89) 834 2734
Europe Mediterranean
Phone: (39 02) 9317 9911
Fax: (39 02) 9317 9913
Europe North
Phone: (44 1344) 486 444
Fax: (44 1344) 486 555
Europe South
Phone: (33 1) 41 44 36 50
Fax: (33 1) 41 44 36 90
Middle East Headquarters
Conexant Systems
Commercial (Israel) Ltd.
P. O. Box 12660
Herzlia 46733, Israel
Phone: (972 9) 952 4064
Fax: (972 9) 951 3924
Japan Headquarters
Conexant Systems Japan Co., Ltd.
Shimomoto Building
1-46-3 Hatsudai,
Shibuya-ku,Tokyo
151-0061 Japan
Phone: (81 3) 5371-1567
Fax: (81 3) 5371-1501
Taiwan Headquarters
Conexant Systems,Taiwan Co., Ltd.
Room 2808
International Trade Building
333 Keelung Road, Section 1
Taipei 110,Taiwan, ROC
Phone: (886 2) 2720 0282
Fax: (886 2) 2757 6760