1. General description
The SAF7167AHW 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. See the overall block diagram.
The operation of SAF7167AHW is controlled via the I
2
C-bus.
2. 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 and RGB 5:6:5
■ Video input rate up to 66 MHz
■ Allows for both binary and twos complement video input data
■ Triple 8-bit DACs for video output
■ Built-in voltage output amplifier
■ Provides keying control with external key and internal 8-bit, 2 × 8-bit and 3 × 8-bit pixel
colour key
■ Programmable via the I
2
C-bus
■ 5 V CMOS device; HTQFP48 package.
3. Quick reference data
SAF7167AHW
YUV-to-RGB digital-to-analog converter
Rev. 01 — 29 June 2004 Product data sheet
Table 1: Quick reference data
Symbol Parameter Conditions Min Typ Max Unit
V
DDD
digital supply voltage 4.75 5.0 5.25 V
V
DDA
analog supply voltage 4.75 5.0 5.25 V
T
amb
ambient temperature −40 - +85 °C
