Instruction Manual
MAX4399
Audio/Video Switch for Three SCART
Connectors
8 _______________________________________________________________________________________
Pin Description
PIN NAME FUNCTION
1 V_DIG Digital Supply Voltage. Connect to 5V.
2 DEV_ADDR
Device Address Set Input. Connect to G_DIG to set write and read addresses of 94h and 95h,
respectively. Connect to V_DIG to set write and read addresses of 96h and 97h, respectively.
3 SDA Bidirectional Data I/O. I
2
C-compatible, 2-wire interface data input/output. Output is open drain.
4 SCL Clock Input. I
2
C-compatible, 2-wire interface clock.
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, AUX_SS, TV_SS, or VCR_SS.
6 G_DIG Digital Ground
7 ENC_L_IN Digital Encoder Left-Channel Audio Input
8 ST_AUX_IN Satellite Dish Tone Input
9 ENC_R_IN Digital Encoder Right-Channel Audio Input
10 AUD_BIAS
Audio Input Bias Voltage. Bypass AUD_BIAS with a 10µF capacitor and a 0.1µF capacitor to
G_AUD.
11, 22, 30 V_AUD
Audio Supply Voltage. Connect all V_AUD together. An on-board linear regulator creates the
+8V audio supply voltage from V12. Bypass pin 30 with a 10µF aluminum electrolytic capacitor
in parallel with a 0.47µF low-ESR ceramic capacitor to audio ground, and bypass pins 11 and
22 with 0.1µF capacitors to audio ground.
12 AUX_L_IN AUX SCART Left-Channel Audio Input
13 AUX_R_IN AUX SCART Right-Channel Audio Input
14 VCR_R_IN VCR SCART Right-Channel Audio Input
15 VCR_L_IN VCR SCART Left-Channel Audio Input
16 TV_R_IN TV SCART Right-Channel Audio Input
Typical Operating Characteristics (continued)
(V
V12
= 12V, V
V_VID
= 5V, V
V_DIG
= 5V, 0.47µF ceramic X5R capacitor in parallel with a 10µF aluminum electrolytic capacitor from
V_AUD to G_AUD, no load, T
A
= +25°C, unless otherwise noted.)
INPUT CLAMP CURRENT
vs. INPUT VOLTAGE
MAX4399 toc19
INPUT VOLTAGE (V)
INPUT CLAMP CURRENT (mA)
4321
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
-0.5
05
OUTPUT BIAS VOLTAGE
vs. TEMPERATURE
MAX4399 toc20
TEMPERATURE (
°
C)
OUTPUT BIAS VOLTAGE (V)
5025
0.5
1.0
1.5
2.0
2.5
0
075
RGB, LUMA, CVBS
CHROMA