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參數(shù)資料
| 型號： | MAX9670CTL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/44頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AUDIO/VIDEO SWIT DUAL 40TQFN |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)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： | 40-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 40-TQFN-EP（6x6） |
| 包裝： | 帶卷 (TR) |
| 配用： | MAX9670EVKIT+-ND - EVALUATION KIT FOR MAX9670 |
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MAX9670/MAX9671
Low-Power Audio/Video Switch with Audio
Volume Control for Dual SCART Connectors
______________________________________________________________________________________
27
Similarly, when YPbPr signals are desired, ENC_R/C_IN,
ENC_G_IN, and ENC_B_IN of the MAX9670/MAX9671
should be set to high-impedance mode by setting bit 4 in
register 08h to high if those video inputs are AC-coupled.
The high-impedance mode has higher priority whether
ENC_R/C_IN is in sync-tip clamp or bias circuit mode
(set by bit 3 in register 08h). If ENC_R/C_IN, ENC_G_IN,
and ENC_B_IN are DC-coupled, the inputs should be left
in sync-tip clamp mode. The RGB outputs of the
MAX9670/MAX9671 should be muted or shut down.
In either case, the inactive device should not distort the
video signals generated by the DACs.
Power-Supply Bypassing
The MAX9670/MAX9671 feature single 3.3V and 12V
supply operation and require no negative supply. The
12V supply V12 is for the SCART switching function. For
V12, place a 0.1F bypass capacitor as close as possi-
ble. Connect all VAUD pins together to 3.3V and bypass
with a 10F electrolytic capacitor in parallel with a
0.1F ceramic capacitor to audio ground. Bypass each
VVID to video ground with a 0.1F ceramic capacitor.
Using a Digital Supply
The MAX9670/MAX9671 are designed to operate from
noisy digital supplies. The high PSRR (49dB at 100kHz)
allows the MAX9670/MAX9671 to reject the noise from
the digital power supplies (see the
Typical Operating
Characteristics). If the digital power supply is very noisy
and stripes appear on the television screen, increase
the supply bypass capacitance. An additional, smaller
capacitor in parallel with the main bypass capacitor
can reduce digital supply noise because the smaller
capacitor has lower equivalent series resistance (ESR)
and equivalent series inductance (ESL).
Layout and Grounding
For optimal performance, use controlled-impedance
traces for video signal paths and place input termina-
tion resistors and output back-termination resistors
close to the MAX9670/MAX9671. Avoid routing video
traces parallel to high-speed data lines.
The MAX9670/MAX9671 provide separate ground con-
nections for video and audio supplies. For best perfor-
mance, use separate ground planes for each of the
ground returns and connect all ground planes together
at a single point. See the MAX9670/MAX9671 evalua-
tion kit for a proven circuit board layout example.
If the MAX9670/MAX9671 are mounted using flow sol-
dering or wave soldering, the ground via(s) for the EP
pad should have a finished hole size of at least 14mils
to insure adequate wicking of soldering onto the
exposed pad. If the MAX9670/MAX9671 are mounted
using solder mask technique, the via requirement does
not apply. In either case, a good connection between
the exposed pad and ground is required to minimize
noise from coupling onto the outputs.
Figure 19. Triple DAC is connected to both a MAX9670/MAX9671 and a MAX9653/MAX9654 high-definition video-filter amplifier. (A)
The MAX9670/MAX9671 are transmitting standard-definition RGB signals while the MAX9653/MAX9654 are in shutdown mode. (B)
The MAX9670/MAX9671 are not transmitting RGB signals, but the MAX9653/MAX9654 are transmitting high-definition YPbPr signals.
DAC
SET-TOP BOX
CHIP
ENC_R/C_IN
ENC_G_IN
ENC_B_IN
75
75
75
TV_R/C_OUT
TV_G_OUT
TV_B_OUT
MAX9653
MAX9654
SCART
CONNECTOR
OFF
YPbPr OUTPUTS
(A)
75
75
75
YOUT
PBOUT
PROUT
YIN
PBIN
PRIN
SHDN
DAC
3.3V
DAC
SET-TOP BOX
CHIP
ENC_R/C_IN
ENC_G_IN
ENC_B_IN
MAX9670/MAX9671
75
75
75
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
0.1
F
TV_R/C_OUT
TV_G_OUT
TV_B_OUT
MAX9653
MAX9654
3.3V
SCART
CONNECTOR
INPUTS SET TO HIGH IMPEDANCE
INPUTS SET TO SYNC-TIP CLAMP
ON
YPbPr OUTPUTS
(B)
75
75
75
YOUT
PBOUT
PROUT
YIN
PBIN
PRIN
SHDN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9670EVKIT+ | 功能描述:交換機 IC 開發(fā)工具 Low-Power A/V Switch w/Audio Volume Cntrl RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:USB Power Switches 工具用于評估:MAX4984E 工作電源電壓:2.8 V to 5.5 V |
| MAX9671CTH+ | 功能描述:視頻開關(guān) IC Low-Power A/V Switch w/Audio Volume Cntrl RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX9671CTH+T | 功能描述:視頻開關(guān) IC Low-Power A/V Switch w/Audio Volume Cntrl RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時間: 開啟時間（最大值）: 關(guān)閉時間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX9671EVKIT+ | 功能描述:交換機 IC 開發(fā)工具 Low-Power A/V Switch w/Audio Volume Cntrl RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:USB Power Switches 工具用于評估:MAX4984E 工作電源電壓:2.8 V to 5.5 V |
| MAX9672ETI+ | 功能描述:LCD Gamma緩沖器 10-Bit Prog Gamma Reference System RoHS:否 制造商:Maxim Integrated 輸入補償電壓: 轉(zhuǎn)換速度: 電源電壓-最大:20 V 電源電壓-最小:9 V 電源電流: 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-38 封裝:Tube |
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