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MAX4397S Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX4397S Datasheet(HTML) 10 Page - Maxim Integrated Products |
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10 / 30 page  Audio/Video Switch for Dual SCART Connectors 10 ______________________________________________________________________________________ Pin Description (continued) PIN MAX4397D MAX4397S NAME FUNCTION 29 29 RF_CVBS_OUT RF Modulator Composite Video Output. Internally biased at 1V. 30 30 TV_Y/CVBS_OUT TV SCART Luma/Composite Video Output. Internally biased at 1V. 31 31 TV_R/C_OUT TV SCART Red/Chroma Video Output. Internally biased at 1V for Red video signal and 2.2V for Chroma video signal. 32 32 TV_G_OUT TV SCART Green Video Output. Internally biased at 1V. 33 33 TV_B_OUT TV SCART Blue Video Output. Internally biased at 1V. 34 34 VCR_Y/CVBS_OUT VCR SCART Luma/Composite Video Output. Internally biased at 1V. 35 35 VCR_R/C_OUT VCR SCART Red/Chroma Video Output. Internally biased at 1V for Red video signals and 2.2V for Chroma video signal. 37 37 TV_R/C_IN TV SCART Red/Chroma Video Input. Internally biased at 1.2V for Red video signals, or 1.9V for Chroma video signals. 38 38 TV_Y/CVBS_IN TV SCART Luma/Composite Video Input. Internally biased at 1.2V. 39 39 VCR_Y/CVBS_IN VCR SCART Luma/Composite Video Input. Internally biased at 1.2V. 40 40 VCR_R/C_IN VCR SCART Red/Chroma Video Input. Internally biased at 1.2V for Red video signals and 1.9V for Chroma video signals. 41 41 VCR_G_IN VCR SCART Green Video Input. Internally biased at 1.2V. 42 42 VCR_B_IN VCR SCART Blue Video Input. Internally biased at 1.2V. 43 43 ENC_Y/CVBS_IN Digital Encoder Luma/Composite Video Input. Internally biased at 1.2V. 44 44 ENC_R/C_IN Digital Encoder Red/Chroma Video Input. Internally biased at 1.2V for Red video signals, or 1.9V for Chroma video signals. 45 45 ENC_G_IN Digital Encoder Green Video Input. Internally biased at 1.2V. 46 46 ENC_B_IN Digital Encoder Blue Video Input. Internally biased at 1.2V. 47 47 ENC_Y_IN Digital Encoder Luma Video Input. Internally biased at 1.2V. 48 48 ENC_C_IN Digital Encoder Chroma Video Input. Internally biased at 1.9V. EP EP GNDAUD Exposed Paddle. Solder to the circuit board ground (GNDAUD) for proper thermal and electrical performance. Detailed Description The MAX4397 is a switch matrix that routes audio and video signals between different ports using the I2C interface. The ports consist of the MPEG decoder out- put, and two SCART connectors for the TV and VCR. Per EN50049 and IEC 933, the encoder can only input a signal to the SCART connector, while TV and VCR SCART connectors are bidirectional. The MAX4397 circuitry consists of four major sections: the video section, the audio section, the slow- and fast- switching section, and the digital interface. The video section consists of clamp and bias circuitry, input buffers, reconstruction filters, a switch matrix, a Y/C mixer, and output buffers. All video inputs are AC- coupled through a 0.1µF capacitor to set an acceptable DC level using clamp or bias networks. The bidirection- al Red/Chroma outputs can be connected to ground using I2C control to make them terminations when Red/Chroma is an input (see the Video Inputs section). The audio section features an input buffer, a switching matrix, volume- or gain-control circuitry, and output dri- vers. The audio inputs are AC-coupled through a 0.1µF capacitor. Only the audio encoder inputs of the MAX4397D are different from the MAX4397S. The MAX4397S has a single-ended audio encoder input while the audio encoder input for the MAX4397D is dif- ferential. The TV output audio path has volume control from -56dB to +6dB in 2dB steps, while the VCR output audio path has volume control from -6dB to +6dB in 6dB steps. The MAX4397 can be configured to switch inputs during a zero-crossing function to reduce clicks. |
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Similar Description - MAX4397S |
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