[AK4708]
AK4708
AV SCART Switch with Two RGB Outputs
GENERAL DESCRIPTION
The AK4708 is an IIC controlled audio and video switch matrix designed for digital TV and set-top-box
applications. The AK4708 offers the ideal features for digital set-top-box systems. The AK4708 includes
the audio switches, video switches, video filters. The AK4708 provides high performance audio and video
routings to meet dual SCART connections. The AK4708 is supplied in a small 48-pin LQFP package to
contribute space saving in PCB.
FEATURES
Analog Switches for SCART
Audio section
THD+N:
−86dB
(@2Vrms)
Dynamic Range: 96dB (@2Vrms)
Analog Inputs
Two Full Differential Stereo Inputs or Single-ended input for Decoder DAC
Two Stereo Inputs (TV & VCR SCART)
Analog Outputs
Two Stereo Outputs (TV & VCR SCART)
Stereo Analog Volume with Pop-noise Free Circuit (+6dB to –60dB & Mute)
Pop Noise Free Circuit for Power on/off
Video section
VCR SCART supports RGB mode
Integrated LPF:
−40dB@27MHz
75Ω driver
6dB Gain for Outputs
Four CVBS/Y inputs (ENCx2, TV, VCR), Two CVBS/Y outputs (TV, VCR)
Three R/C inputs (ENCx2, VCR), Two R/C outputs (TV, VCR)
Two G and B inputs (ENC, VCR), Two G and B outputs (TV, VCR)
TV/VCR input monitor
Loop-through Mode for standby
Auto-Startup Mode for power saving
SCART pin#16 (Fast Blanking), pin#8 (Slow Blanking) Control
Power supply
5V+/−5% and 12V+/−10%
Small current consumption in Standby Mode
(VD=10μA typ., VVD1+VVD2=10μA typ., VP=10μA typ.)
Package
48-pin LQFP
MS0618-E-00
-1-
2007/04
AKM [ ASAHI KASEI MICROSYSTEMS ]
