W9951TF
TRIP 8-BIT DAC-MUXWITHGENLOCK PLL & ANALOG
COLOR KEY
Winbond Corporate Headquarters
Taipei Sales Office
Winbond Electronics North America Corp.
Winbond Electronics .H.K. Ltd.
Tel : 886-3-5790666
Tel : 886-2-27190505
Tel : 1-408-943666
Tel : 852-27513100
Fax : 886-3-5796139
Fax : 886-2-27197502
Fax : 1-408-9436668
Fax : 852-27552064
Details are subject to change without notice. All trademarks are property of their respective holders. Apr. 1997
GENERAL DESCRIPTION
Winbond's W9951TF combines three 8-bit DACs, a YUV-to-RGB Color Space Converter, high-speed
analog multiplexers, analog input attenuators, video buffers, a genlock PLL, analog color key detector,
and numerous programmable features in one integrated circuit.
The W9951TF's high-speed analog multiplexer allows simultaneous display of video (digital RGB or
YUV) with graphics (analog RGB), making the W9951TF ideal for video games, video editing, CD and
PC video, and for applications requiring picture-in-picture capability.
The W9951TF provides a 24-bit digital interface, which supports both RGB and 4:2:2 YCbCr input
formats. With the 4:2:2 YCbCr input format, a built-in color space converter translates YUV video
information to RGB before mixing with the analog graphics input.
There are eighteen control registers, which provide access to video attribute control functions of
contrast, hue, brightness, PLL divider value, and analog color key range. These functions are
programmable via the two-wire serial interface pins.
FEATURES
Triple 8-bit DAC and buffers support up to 1280 x 1024 resolution
Built-in Genlock PLL regenerates pixel clock for video processor
Programmable Color Key for Analog RGB inputs
Genlock & Analog Keying Capability eliminates the need for VGA-Video feature connector
High-speed multiplexing between digital and analog RGB signals
24-bit interface supports up to 16.7M colors
Supports CCIR601 4:2:2 YCbCr input format
Built in YUV-to-RGB color space conversion
Analog RGB inputs with programmable attenuation
2's complement input capability on two channels
Programmable brightness, contrast and hue attributes for the digital input signals
Programmable switching delay compensation
Two-wire serial programming
CMOS technology in 64-pin PQFP
5V supply
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