CH7008A

Features:

• Support for low voltage interface to VGA controller
• Universal digital interface accepts YCrCb (CCIR656) or RGB (15, 16 or 24-bit multiplexed) video data in both non-interlaced and interlaced formats
• TrueScale TM rendering engine supports underscan operations for various graphic resolutions† ¥
• Enhanced text sharpness and adaptive flicker removal with up to 5-lines of filtering†
• Enhanced dot crawl control and area reduction
• Fully programmable through I2C port
• Supports NTSC, NTSC-EIA (Japan), and PAL (B, D, G, H, I, M and N) TV formats
• Provides Composite, S-Video and SCART outputs
• Auto-detection of TV presence
• Programmable power management
• 9-bit video DAC outputs
• Complete Windows and DOS driver software
• Offered in 44-pin PLCC, 44-pin TQFP

† Patent number 5,781,241
¥ Patent number 5,914,753

Pinout




Specifications

Symbol	Description	Min	Typ	Max	Units
	VDD relative to GND	- 0.5		7.0	V
	Input voltage of all digital pins1	GND - 0.5		VDD + 0.5	V
TSC	Analog output short circuit duration		Indefinite		Sec
TAMB	Ambient operating temperature	- 55		85
TSTOR	Storage temperature	- 65		150
TJ	Junction temperature			150
TVPS	Vapor phase soldering (one minute)			220

Description

Chrontel's CH7008 digital PC to TV encoder is a standalone integrated circuit which provides a PC 99 compliant solution for TV output on non-DVD enabled systems. Suggested application use with the Intel 810 chipset & Intel 810E chipset.* CH7008A provides a universal digital input port to accept a pixel data stream from a compatible VGA controller (or equivalent) and converts this directly into NTSC or PAL TV format.
CH7008A integrates a digital NTSC/PAL encoder with 9-bit DAC interface, and new adaptive flicker filter, and high accuracy low-jitter phase locked loop to create outstanding quality video. Through its TrueScaleTM scaling and deflickering engine, the CH7008 supports full vertical and horizontal underscan capability and operates in 5 different resolutions including 640x480 and 800x600.

A new universal digital interface along with full programmability make the CH7008 ideal for system-level PC solutions. All features are software programmable through a standard I2C port, to enable a complete PC solution using a TV as the primary display.