參數(shù)資料
型號(hào)： MAX4399CTK+TD
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 11/33頁(yè)
文件大?。?/td> 0K
描述： IC SW A/V SCART CON 68-TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
類型： 開關(guān)
應(yīng)用： 接收器，機(jī)頂盒，電視
安裝類型： 表面貼裝
封裝/外殼： 68-TQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 68-TQFN-EP（10x10）
包裝： 帶卷 (TR)
Hot-Plug of SCART Connectors—Floating
Chassis Discharge
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-
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 0.1
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.
MAX4399
Audio/Video Switch for Three SCART
Connectors
______________________________________________________________________________________
19
CLAMP
LOWPASS FILTER
D/A
CVBS
A = +1V/V
IN1
OUT1
0.1
F
ENC_Y/CVBS_IN
CLAMP
LOWPASS FILTER
D/A
Y
A = +1V/V
IN2
OUT2
0.1
F
ENC_Y_IN
BIAS
LOWPASS FILTER
D/A
C
A = +1V/V
IN3
OUT3
0.1
F
ENC_C_IN
CLAMP
LOWPASS FILTER
D/A
R
A = +1V/V
IN4
OUT4
0.1
F
ENC_R/C_IN
CLAMP
LOWPASS FILTER
D/A
G
A = +1V/V
IN5
OUT5
0.1
F
ENC_G_IN
CLAMP
LOWPASS FILTER
D/A
B
A = +1V/V
IN6
OUT6
0.1
F
ENC_B_IN
MPEG DECODER
MAX7440
MAX4399
G_VID
+5V
V_VID
+5V
0.1
F1F
Figure 9. MPEG Decoder Outputs Filtered by the MAX7440 Before Being Passed to the MAX4399
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