MAX9595
Audio/Video Switch for Dual SCART Connector
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Pin Description
PIN NAME FUNCTION
1 SDA Bidirectional Data I/O. I
2
C -compatible, 2-wire interface data input/output. Output is open drain.
2 SCL Serial Clock Input. I
2
C -compatible, 2-wire clock interface.
3 DEV_ADDR
Device Address Set Input. Connect to GNDVID to set write and read addresses of 94h or 95h,
respectively. Connect to V
VID
to set write and read address of 96h or 97h, respectively.
4 ENC_INL Digital Encoder Left-Channel Audio Input
5
INTERRUPT_OUT
Interrupt Output. INTERRUPT_OUT is an open-drain output that goes high impedance to
indicate a change in the slow switch lines, TV_SS or VCR_SS.
6 ENC_INR Digital Encoder Right-Channel Audio Input
7 N.C. No Connection. Not internally connected.
8 VCR_INR VCR SCART Right-Channel Audio Input
9 VCR_INL VCR SCART Left-Channel Audio Input
10 TV_INR TV SCART Right-Channel Audio Input
11 TV_INL TV SCART Right-Channel Audio Input
12 GNDAUD Audio Ground
13 AUD_BIAS
Audio Input Bias Voltage. Bypass AUD_BIAS with a 47µF capacitor and a 0.1µF capacitor to
AUDGND.
14 V
AUD
Audio Supply. Connect to a +5V supply. Bypass with a 10µF aluminum electrolytic capacitor in
parallel with a 0.47µF low-ESR ceramic capacitor to GNDAUD.
15 VCR_OUTR VCR SCART Right-Channel Audio Output
16 VCR_OUTL VCR SCART Left-Channel Audio Output
17
RF_MONO_OUT
RF Modulator Mono Audio Output
18 TV_OUTL TV SCART Left-Channel Audio Output
19 TV_OUTR TV SCART Right-Channel Audio Output
20 V
12
+12V Supply. Bypass V
12
with a 10µF capacitor in parallel with a 0.1µF capacitor to ground.
21 TV_SS TV SCART Bidirectional Slow-Switch Signal
22 VCR_SS VCR SCART Bidirectional Slow-Switch Signal
23 SET Filter Cutoff Frequency Set Input. Connect 100kΩ resistor from SET to ground.
24, 36 V
VID
Video and Digital Supply. Connect to a +5V supply. Bypass with a 0.01µF capacitor to GNDVID.
V
VID
also serves as a digital supply for the I
2
C interface.
25 VCRIN_FS VCR SCART Fast-Switching Input
26 ENCIN_FS Digital Encoder Fast-Switching Input
27 TVOUT_FS
TV SCART Fast-Switching Output. This signal is used to switch the TV to its RGB inputs for on-
screen display purposes.
28 GNDVID Video Ground
29 RF_CVBS_OUT RF Modulator Composite Video Output. Internally biased at 1V.
30
TV_Y/CVBS_OUT
TV SCART Luma/Composite Video Output. Internally biased at 1V.
31 TV_R/C_OUT
TV SCART Red/Chroma Video Output. Internally biased at 1V for red video signal and 2.2V for
chroma video signal.
