Bt868

Features:

• Digital RGB or YCrCb non-interlaced input to interlaced or non-interlaced analog TV output modes:
    YCrCb Modes:
16-bit 4:2:2 multiplexed 8-bit
24-bit 4:4:4 multiplexed 12-bit
24-bit 4:4:4 non-multiplexed 24-bit
    RGB Modes:
15/16 bit 5:6:5 RGB multiplexed 8-bit
24-bit 8:8:8 RGB mulitplexed 12-bit
24-bit 8:8:8 RGB non-multiplexed 24-bit
• Digital RGB non-interlaced input to analog RGB noninterlaced (VGA/SVGA) output modes:
15/16 bit 5:6:5 RGB multiplexed 8-bit
24-bit 8:8:8 RGB mulitplexed 12-bit
24-bit 8:8:8 RGB non-multiplexed 24-bit
• Support for NTSC/PAL outputs in the following modes:
Interlaced and non-interlaced outputs
S-video output (simultaneous with composite NTSC or PAL outputs)
Component YUV analog output mode
• 5-line vertical filtering scaling for overscan compensation and flicker filtering
• CCIR601 compatible input mode
• Luma and chroma comb filtering
• 3 x 10-bit DACs
• 6 MHz Luma bandwidth
• Macrovision 7.0 copy protection
• 80-pin PQFP package
• 3.3 V operation with 5 V tolerant IOs
• 2-line serial programming interface
• Power-Down modes
• Master/slave video timing operation
• TV connected register flag
• Automatic configuration


Application

• Desktop/Portable PCs with TV-Out
• Living-room PCs
• Internet PC/TVs
• Internet Appliances


Pinout




Specifications

Parameter	Symbol	Min	Typ	Max	Units
VAA, VDD (measured to GND)				7.0	V
VDD_SI (measured to GND)				7.0	V
Voltage on Any Signal Pin(1)		GND 0.5		VDD_SI+ 0.5	V
Analog Output Short Circuit Duration to Any Power Supply or Common	ISC		Indefinite
Storage Temperature	TS	65		+150
Junction Temperature	TJ			+125
Vapor Phase Soldering (1 Minute)	TVSOL			220

(1)This device employs high-impedance CMOS devices on all signal pins. It should be handled as an ESD-sensitive device.  Voltage on any signal pin that exceeds the power supply or ground voltage by more than 0.5 V can cause destructive latchup.

Stresses above those listed under "Absolute Maximum Ratings" can cause permanent damage to the device. This is a stress rating only, and functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods can affect device reliability.


Description

The Bt868/869 is specifically designed for video systems requiring the generation of high-quality flicker-free composite and Y/C (S-video) signals from various YCrCb or RGB digital streams. The Bt868/869 accepts any input format from 640 x 480 to 800 x 600 resolution.

The Bt868/869 uses Conexant's UltraScale™ technology to provide the most advanced vertical and horizontal scaling necessary for the display of non-interlaced data on interlaced devices such as the TV. The UltraScale™ technology of Bt868 converts the lines of input pixel data to the appropriate number of output lines for producing a full-screen, high-quality image.

The Bt868/869 performs 5-line vertical filtering, which includes poly phase interpolation scaling for overscan compensation and flicker filtering. Horizontal scaling for overscan compensation is achieved by altering the encoder clock frequency. This approach of Bt868 preserves all of the high frequency components of the input signals, which are essential for the highest quality display of text intensive images such as web pages on TVs. The amount of flicker filtering and overscan compensation is programmable.

Worldwide video standards are supported, including NTSC-M (N. America, Taiwan, Japan), PAL-B,D,G,H,I (Europe, Asia), PAL-M (Brazil), PAL-N (Uruguay, Paraguay), and PAL-Nc (Argentina). Bt868 and Bt869 are functionally identical, with the exception that Bt869 can output Macrovision Level 7.0 anticopy algorithm.