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参数资料
| 型号： | MAX9655AEE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/17页 |
| 文件大小： | 0K |
| 描述： | IC SW VIDEO LOW POWER 16-QSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 功能： | 视频开关 |
| 电路： | 2 x SCART |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.7 V ~ 3.6 V |
| 电流 - 电源： | 21mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-QSOP |
| 包装： | 管件 |
MAX9655/MAX9656
Low-Power Video Switches
for Dual SCART Connectors
8
_______________________________________________________________________________________
The incoming video signals can have any DC bias
because the input sync-tip clamps restore the
DC level. The output amplifiers have a gain of 2V/V.
The MAX9655/MAX9656 operate from a single 3.3V
supply and consume low quiescent power and low
average power. In addition, the MAX9656 also has
shutdown mode.
Operating Modes
TV_SEL controls whether the encoder or VCR video sig-
nals are sent to the TV SCART. See Table 1.
On the MAX9656, VCR_SEL controls whether the CVBS
signal from the TV SCART or the encoder is sent to the
VCR SCART. SHDN controls whether the device is on
or off. See Tables 2 and 3. In shutdown, the outputs of
the MAX9656 are high impedance.
Input
Every video signal must be AC-coupled to the
MAX9655/MAX9656 through 0.1F capacitors. The
MAX9655/MAX9656 have sync-tip clamps and bias cir-
cuits to restore the DC level of the video signal after the
input coupling capacitor. When a video input is select-
ed, the input has a sync-tip clamp, which accepts
video signals that have sync pulses or that reach their
minimum level during sync. Composite video with
blanking and sync (CVBS) is an example of a video sig-
nal with sync pulses. The red, green, and blue signals
in an RGBS signal set are examples of signals that
return to their blank level during sync. The sync-tip volt-
age is internally set to 300mV.
When a video input is not selected, the inputs to the
MAX9655 and the MAX9656 do not distort the video
signal in case the video source is driving video signals
to another video circuit such as a video multiplexer.
The inputs are biased at VDD/3, which is sufficiently
above ground so that the ESD diodes never forward
bias as the video signal changes. The input resistance
is 220k
Ω, which presents negligible loading on the
video current DAC. The sole exception to this condition
is ENC_CVBS_IN (MAX9655), in which the input circuit
is always a sync-tip clamp. Table 4 summarizes which
input circuit is active on the inputs of the MAX9655
depending on TV_SEL. Table 5 summarizes which input
circuit is active on the inputs of the MAX9656 depend-
ing on TV_SEL and VCR_SEL.
LOGIC STATE
MODE
Low
Encoder video signals are routed to the
TV SCART.
High
VCR SCART video signals are routed to
the TV SCART.
Table 1. TV_SEL Logic (Applicable to
Both the MAX9655 and the MAX9656)
LOGIC STATE
MODE
Low
CVBS signal from encoder is routed to the
VCR SCART.
High
CVBS signal from the TV SCART is routed
to the VCR SCART.
Table 2. VCR_SEL Logic (Only Applicable
to the MAX9656)
LOGIC STATE
MODE
Low
Off
High
On
Table 3.
SHDN Logic (Only Applicable to
the MAX9656)
INPUT
INPUT CIRCUIT
(TV_SEL = LOW)
INPUT CIRCUIT
(TV_SEL = HIGH)
ENC_B_IN
Sync-tip clamp
Bias
ENC_G_IN
Sync-tip clamp
Bias
ENC_R_IN
Sync-tip clamp
Bias
ENC_CVBS_IN
Sync-tip clamp
VCR_B_IN
Bias
Sync-tip clamp
VCR_G_IN
Bias
Sync-tip clamp
VCR_R_IN
Bias
Sync-tip clamp
VCR_CVBS_IN
Bias
Sync-tip clamp
Table 4. MAX9655 Input Circuit of Input as Determined by State of TV_SEL
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相关代理商/技术参数 |
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| MAX9655AEE+ | 功能描述:视频开关 IC Video Switch f/Dual SCART Connector RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX9655AEE+T | 功能描述:视频开关 IC Video Switch f/Dual SCART Connector RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX9655EVKIT+ | 功能描述:视频 IC 开发工具 MAX9655 Eval Kit RoHS:否 制造商:Texas Instruments 产品:Evaluation Boards 类型:YPbPr to RGBHV Converters 工具用于评估:LMH1251 工作电源电压:5 V |
| MAX9656AEP+ | 功能描述:视频开关 IC Video Switch f/Dual SCART Connector RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX9656AEP+T | 功能描述:视频开关 IC Video Switch f/Dual SCART Connector RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
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