AL240

Features:

` Decodes NTSC, PAL and SECAM composite video or S-video
` Supports all variations of the NTSC standard (M, 4.43)
` Supports all variation of the PAL standard (I, B, G, H, D, N, M, combination N)
` 2x 10-bit A/D converter
` Supports digital automatic gain control (AGC)
` 4 analog input with internal switches among four input for e.g. 4xCVBS, 2xS-Video or (2xCVBS & 1xS-Video)
` Standard 8-bit ITU-R.BT656 along with separate sync signals, YCbCr 4:2:2 format output
` Line-Locked system clock frequencies
` Excellent quality Y/C separation minimizes cross luma and cross color effects
` Adaptive Comb Filter for NTSC&PAL Y/C separation
` Software support format detection of video standard (NTSC, PAL or SECAM)
` BCS (Brightness/Contrast/Saturation and Hue) control
` Auto detects and locks VCR trick modes
` Support VBI decoding
` Decodes weak and noisy off-air signals
` Hardware channel switching
` Two-wire serial bus programming with up to 4 serial bus sub-addresses selectable
` Software power down mode
` 3.3V and 1.8V mix low power supply
` 44-pin QFP Lead Free package




Application

· Video surveillance applications.
· Mobile System
· Handheld Applications
· Video Capture devices
· Video Phone
· Networking Video




Pinout






Specifications

Parameter		1.8V/3.3V Rating	Unit
AVDD33	Analog front end supply voltage AVDD to AGND)	-0.3 ~ +4.5	V
DVDD33	I/O supply voltage (DVDD to DGND)	-0.3 ~ +4.5	V
AVDD18	Analog logic supply voltage (AVDD to AGND)	-0.3 ~ +2.3	V
DVDD18	Digital core supply voltage (DVDD to DGND)	-0.3 ~ +2.3	V
VP	Input pin voltage (Vp to DGND)	-0.3 ~ +(VDD+0.3)	V
IO	Output current	-20 ~ +20	mA
TAMB	Ambient operating temperature	0 ~ +70
Tstg	Storage temperature	-40 ~ +125

Description



The AL240 is silicon efficient, cost effective high video quality NTSC/PAL SECAM video decoder with high quality Y/C separation process. It decodes NTSC/PAL/SECAM composite video or S-video and convert it into YCbCr 4:2:2, 8-bit digital video output. Employing adaptive filter technology, the AL240 is able to provide a clear Y/C separated signals while maintaining excellent frequency response. The result is sharp, high detail video that eliminates unwanted dot crawl and false color effects. Fully programmable video characteristic controls, such as hue, contrast, brightness, saturation, are supported. The AL240 decoder incorporates an advanced vertical blanking interval (VBI) data processor to do data slicing, parsing and decoding teletext, closed caption, and other formats. Two wires of hardware channel switching inputs allow decoder to do an instant alternation of analog CVBS inputs from one to the other. Up to 4 serial bus addresses can be selected via two configuration pins that allow multiple AL240 chips on the design without extra logic.

The AL240 supports power saving mode and operates under the low power voltages (3.3V and 1.8V) in 44-pin Lead Free (PBF) QFP package.