1995 Nov 03

2

Philips Semiconductors

Preliminary specification

YUV-to-RGB Digital-to-Analog

Converter (DAC)

SAA7167

FEATURES

• On-chip mixing of digital video data and analog

RGB signals

• Supports video input format of YUV 4 :2:2, 4:1:1,

2:1:1 andRGB 5:6:5

• Video input rate up to 50 MHz

• Allows for both binary and two’s complement video

input data

• Triple 8-bit DACs for video output

• Built-in voltage output amplifier

• Provide keying control with external key and internal

8-bit, 2

× 8-bit and 3 × 8-bit pixel colour key

• 5 V CMOS device; LQFP48 package.

GENERAL DESCRIPTION

The SAA7167 is a mixed-mode designed IC containing a

video data path, keying control block, analog mixer, and a

voltage output amplifier, capable of converting digital video

data to analog RGB video, and then mixing video and

external analog RGB inputs.

The video data path contains a data re-formatter,

YUV-to-RGB colour space matrix as well as triple DACs for

video data processing. An analog mixer performs

multiplexing between DAC outputs of the video path and

external analog RGB inputs.

The final analog outputs are buffered with built-in voltage

output amplifiers to provide the direct driving capability for

a 150

Ω load. Figure 1 shows the overall block diagram.

QUICK REFERENCE DATA

ORDERING INFORMATION

SYMBOL

PARAMETER

MIN.

MAX.

UNIT

digital supply voltage

4.75

5.25

V

analog supply voltage

4.75

5.25

V

operating ambient temperature

0

70

°C

TYPE

NUMBER

PACKAGE

NAME

DESCRIPTION

VERSION

SAA7167

LQFP48

plastic low profile quad flat package; 48 leads; body 7

× 7 × 1.4 mm

SOT313-2