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參數(shù)資料
| 型號： | MAX4397DCTM+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 4/30頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SW A/V SCART CON 48-TQFN |
| 產(chǎn)品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 43 |
| 類型： | 開關 |
| 應用： | DVD，機頂盒，電視 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應商設備封裝： | 48-TQFN-EP（7x7） |
| 包裝： | 管件 |
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MAX4397DA/SA
Video Inputs
All video inputs are AC-coupled with an external 0.1F
capacitor. Either a clamp or bias circuit sets the DC
input level of the video signals. The clamp circuit posi-
tions the sync tip of the Composite (CVBS), the
Component RGB, or the S-Video Luma signal. If the sig-
nal does not have a sync tip, then the clamp positions
the minimum of the signal at the clamp voltage. The bias
circuitry is used to position the S-video Chroma signal at
midlevel of the Luma (Y) signal. On the video inputs that
can receive either a Chroma or a Red video signal, the
bias or clamp circuit is selected through I2C. See Tables
3–12 for loading register details.
The MPEG decoder and VCR uses the RGB format and
fast switching to insert an on-screen display (OSD), usu-
ally text, onto the TV. The MAX4397DA/SA support RGB
as an input from either the VCR or the MPEG decoder
and as an output only to the TV. The Red video signal of
the RGB format and the Chroma video signal of the S-
VHS format share the same SCART connector pin.
Therefore, RGB and S-video signals cannot be present
at the same time. Loop-through is possible with a
Composite video signal but not with RGB signals
because the RGB SCART pins are used for both input
and output.
In SCART, there is the possibility of a bidirectional use
of the Red/Chroma pin. When using the Red/Chroma
pin as an input port, terminate the Red/Chroma output
with a 75 resistor to ground. Thus, a ground state is
provided by an active pulldown to GNDVID on the
Red/Chroma output to support the bidirectional Chroma
or Red I/O, turning the output source resistors into ter-
minations (see Figure 2). The active pulldown also pro-
vides the “Mute Output” function and disables the
deselected video outputs. The “Mute Output” state is
the default power-on state for video.
For high-quality home video, the MPEG decoder, VCR,
and TV use the S-video format. The MAX4397DA/SA
support S-video signals as an input from the VCR, the
MPEG decoder, and the TV, and also as a separately
switchable output to the TV and VCR. Because S-video
support was not included in the original specifications
of the SCART connector, the Luma (Y) signal of S-video
and the CVBS signal share the same SCART connector
pins. If S-video is present, then a Composite signal
must be created from the Y and C signals to drive the
RF_CVBS_OUT pin. For S-video, loop-through is not
possible since the Chroma SCART port is used for both
input and output.
The MAX4397DA/SA support Composite video (CVBS)
format, with inputs from the VCR, MPEG decoder, and
TV. Full loop-through is possible to the TV and VCR
only since the MPEG decoder SCART connector has
separate input and output pins for the CVBS format.
Audio/Video Switch for Dual SCART Connectors
12
______________________________________________________________________________________
CLAMP
N
CLAMP/BIAS
TV_R/C_IN
VIDEO INPUT
TV_R/C_IN
VIDEO INPUT
75
0.1F
75
PIN 15
PIN 13
PIN 15
PIN 13
MAX4397DA/SA
TV_R/C_OUT
PULLDOWN
SCART
CABLE
SCART
CONNECTORS
PULLDOWN
CLAMP
N
TV_R/C_OUT
CLAMP/BIAS
Figure 2. Bidirectional SCART Pins
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4397DCTM+ | 功能描述:視頻開關 IC Audio/Video Switch for Dual SCART Con RoHS:否 制造商:Texas Instruments 開關數(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 |
| MAX4397DCTM+T | 功能描述:視頻開關 IC Audio/Video Switch for Dual SCART Con RoHS:否 制造商:Texas Instruments 開關數(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 |
| MAX4397DCTM-T | 功能描述:視頻開關 IC RoHS:否 制造商:Texas Instruments 開關數(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 |
| MAX4397EVKIT | 制造商:Maxim Integrated Products 功能描述:AUDIO/VIDEO SWITCH FOR DUAL SCART C - Rail/Tube |
| MAX4397SACTM+ | 功能描述:視頻開關 IC Audio/Video Switch for Dual SCART Con RoHS:否 制造商:Texas Instruments 開關數(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 |
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