參數(shù)資料
型號: MAX9671CTH+T
廠商: Maxim Integrated Products
文件頁數(shù): 17/44頁
文件大?。?/td> 0K
描述: IC AUDIO/VIDEO SWIT DUAL 44TQFN
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
功能: 音頻/視頻切換
電路: 2 x SCART
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 3.3 V ~ 12 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 44-WFQFN 裸露焊盤
供應商設備封裝: 44-TQFN-EP(7x7)
包裝: 帶卷 (TR)
配用: MAX9671EVKIT+-ND - EVALUATION KIT FOR MAX9671
MAX9670/MAX9671
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
24
______________________________________________________________________________________
on the same SCART pin, but not at the same time. The
75
resistor connected to VCR_R/C_OUT must act as a
back termination resistor when the MAX9670/MAX9671
is transmitting chroma signal and as an input termina-
tion resistor when it is receiving a chroma signal. Figure
15 shows how the MAX9670/MAX9671 transmits a
chroma signal to the VCR SCART connector while
Figure 16 shows how the MAX9670/MAX9671 receives
a chroma from the VCR SCART connector.
Write a 0 into bit 2 of register 09h to open the pulldown
switch at VCR_R/C_OUT. To close the pulldown switch,
write a 0 into bit 6 of register 0Dh to turn off the output
amplifier, and then write a 1 into bit 2 of register 09h.
See Tables 17 and 18.
Figure 15. Gain-of-2 amplifier on VCR_R/C_OUT outputs chroma signal to VCR SCART connector. Notice that the pulldown switch on
VCR_R/C_OUT is open.
VCR
SCART
TV
SCART
AV = 2V/V
TV_R/C_OUT
AV = 2V/V
VCR_R/C_OUT
VCR_R/C_IN
BIAS
ENC_R/C_IN
BIAS
ENC_C_IN
BIAS
LPF
ON
MAX9670/MAX9671
75
75
0.1
F
Figure 16. VCR_R/C_IN receives chroma signal from VCR SCART connector. Notice that the pulldown switch on VCR_R/C_OUT is
closed and that the gain-of-2 amplifier is off. The chroma signal from VCR SCART is looped through to the TV SCART in the above
configuration.
VCR
SCART
TV
SCART
AV = 2V/V
TV_R/C_OUT
AV = 2V/V
VCR_R/C_OUT
VCR_R/C_IN
BIAS
ENC_R/C_IN
BIAS
ENC_C_IN
BIAS
LPF
OFF
MAX9670/MAX9671
75
75
0.1
F
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