Techwell
Security Surveillance IC Solutions
Target Applications
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Embedded DVR
Video Server
DVR PCI Card
4-Channel Video Decoder and Audio Codec plus
Video Encoder for Security Applications
TW2866
The TW2866 is Techwell’s second-generation 4-in-1 video decoder and audio codec plus video encoder for security surveillance
applications. The device includes four high quality NTSC/PAL/SECAM video decoders that convert analog composite video
signal to digital component YCbCr data. Each channel contains a 10-bit ADC and proprietary clamp/gain controller and
utilizes 4H comb filter for separating luminance & chrominance to reduce cross noise artifacts. The TW2866 adopts image
enhancement techniques such as IF compensation filter, CTI and programmable peaking. In addition, TW2866 includes one
NTSC/PAL video encoder with two 10-bit DACs to support CVBS and YC output. The TW2866 also includes an audio codec
which has five audio ADCs and one DAC. A built-in audio controller can generate digital outputs for recording/mixing and
accepts digital input for playback.
Techwell
www.intersil.com
Security Surveillance IC Solutions
4-Channel Video Decoder and Audio Codec plus
Video Encoder for Security Applications
TW2866
Video Decoder
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Accepts all NTSC(M/4.43) / PAL(B/D/G/H/I/K/L/M/N/60)/SECAM standards with auto detection
Integrated four video analog anti-aliasing filters and 10-bit ADCs
High performance adaptive 4H comb filters for all NTSC/PAL standards
IF compensation filter for improvement of color demodulation
Color Transient Improvement (CTI) and automatic white peak control
Programmable hue, saturation, contrast, brightness and sharpness
Proprietary fast video locking system for non-realtime application
Supports the standard ITU-R BT.656 format or time multiplexed output with 54/108MHz.
Provides simultaneous four channel Full D1 and CIF time-multiplexed outputs with 54MHz.
Video Encoder
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NTSC/PAL Video Encoder
CVBS and S-video Support
TW2866 Block Diagram
Audio Codec
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Integrated five audio ADCs and one audio DAC
Provides multi-channel audio mixed analog output
Supports I2S/DSP Master/Slave interface for record
output and playback input.
PCM 8/16 bit and u-Law/A-Law 8bit for audio word
length
Programmable audio sample rate that covers popular
frequencies of 8/16/32/44.1/48kHz
Other Features
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2x/4x analog clock PLL for 108MHz clock output
Supports a two-wire serial host interface
1.2V, 3.3V Supply
Low power consumption
Order Information
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Part Number: TW2866
Package: 128-pin LQFP
© 2009 Intersil Americas Inc. All Rights Reserved. The following are trademarks or registered
trademarks of Intersil Americas Inc.: Intersil, Intersil logo, “i” and Design. All other trademarks are the
property of the respective trademark owners.
Techwell
www.intersil.com
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