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AK4709 Datasheet, PDF (1/42 Pages) Asahi Kasei Microsystems – Low Power AV SCART Switch | |||
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[AK4709]
AK4709
Low Power AV SCART Switch
GENERAL DESCRIPTION
The AK4709 is an I2C 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.
FEATURES
Analog switches for SCART
Audio section
 THD+N: â95dB (@2Vrms)
 Dynamic Range: 99dB (@2Vrms), (A-weighted)
 Stereo Analog Volume with Pop-noise Free Circuit (+6dB to â60dB &
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: â40dB@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+/â5% and 12V+/â10%
 Low Power Dissipation / Low Power Standby Mode
Package
 Small 48pin LQFP
MS1319-E-00
-1-
2011/07
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