[AK4709]
AK4709
Low Power AV SCART Switch
GENERAL DESCRIPTION
The AK4709 is an I C controlled audio and video switch which has a matrix designed architecture for
digital TV and set-top-box applications. The AK4709 offers the ideal features for digital set-top-box
systems. The AK4709 includes audio switches, video switches, and video filters. The integrated audio
driver supports ground referenced outputs, eliminating the need for large AC-coupling capacitors,
reducing cost and saving board space. The AK4709 is housed in a space saving small 48-pin LQFP
package.
2
FEATURES
Analog switches for SCART
Audio section
THD+N:
−95dB
(@2Vrms)
Dynamic Range: 99dB (@2Vrms), (A-weighted)
Stereo Analog Volume with Pop-noise Free Circuit (+6dB to –60dB &
Mute)
Analog Inputs
One Full Differential Stereo Input or Single-ended input for Decoder
DAC
Two Stereo Input (TV & VCR SCART)
Analog Outputs
Two Stereo Outputs (TV & VCR SCART)
Ground-Referenced Outputs Eliminate DC-Blocking Capacitor
Video section
Integrated LPF:
−40dB@27MHz
75ohm 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 output (TV, VCR)
Two G and B inputs (ENC, VCR), One G and B outputs (TV)
Bi-Directional Control for VCR-Red/Chroma
Y/Pb/Pr Option (to 6MHz)
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
3.3V+/−5% and 12V+/−10%
Low Power Dissipation / Low Power Standby Mode
Package
Small 48pin LQFP
MS1319-E-00
-1-
2011/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
