MAX4399CTK+TD Maxim Integrated Products, MAX4399CTK+TD Datasheet - Page 19

• Manufacturer Part Number: MAX4399CTK+TD
• Description: IC SW A/V SCART CON 68-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Switchr

Specifications of MAX4399CTK+TD

• Applications: Receivers, Set-Top Boxes, TV
• Mounting Type: Surface Mount
• Package / Case: 68-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX4399 features high-ESD protection on all
SCART inputs and outputs, and requires no external
transient voltage suppressor (TVS) devices to protect
against floating chassis discharge. Some set-top boxes
have a floating chassis problem in which the chassis is
not connected to earth ground. As a result, the chassis
can charge up to 500V. When a SCART cable is con-
Figure 9. MPEG Decoder Outputs Filtered by the MAX7440 Before Being Passed to the MAX4399
Hot-Plug of SCART Connectors—Floating
MPEG DECODER
CVBS
C
G
Y
R
B
D/A
D/A
D/A
D/A
D/A
D/A
0.1µF
______________________________________________________________________________________
+5V
1µF
Audio/Video Switch for Three SCART
IN1
IN2
IN3
IN4
IN5
IN6
Chassis Discharge
LOWPASS FILTER
LOWPASS FILTER
LOWPASS FILTER
LOWPASS FILTER
LOWPASS FILTER
LOWPASS FILTER
MAX7440
A = +1V/V
A = +1V/V
A = +1V/V
A = +1V/V
A = +1V/V
A = +1V/V
nected to the SCART connector, the charged chassis
can discharge through a signal pin. The equivalent cir-
cuit is a 2200pF capacitor charged to 311V connected
through less than 0.1Ω to a signal pin. The MAX4399 is
soldered on the PC board when it experiences such a
discharge. Therefore, the current spike flows through
the ESD protection diodes and is absorbed by the sup-
ply bypass capacitors, which have high capacitance
and low ESR.
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
ENC_Y/CVBS_IN
ENC_R/C_IN
ENC_C_IN
ENC_G_IN
ENC_Y_IN
ENC_B_IN
CLAMP
CLAMP
CLAMP
CLAMP
CLAMP
BIAS
Connectors
MAX4399
G_VID
V_VID
+5V
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