STV6688 Datasheet | STMicroelectronics

® Video Switch Matrix for TV Applications with S Terminal PRODUCT PREVIEW Key Features s I²C Bus Control s Standby Mode s 4 Y/CVBS Inputs (one for internal TV signal) s 4 C Inputs (one for internal TV signal) s 1 Y/C Adder s 1 Y/CVBS and 1 C Output, each with 0 d B gain s 1 CVBS Output with 6 d B gain and 150 Ω Buffer for Monitor s SYNC Bottom Clamp on all CVBS/Y and Average Bias on C Inputs s Bandwidth: 15 MHz s Crosstalk: 50 d B (min.) PSO20 Order Code: STV6688A Order Code: STV6688 PDIP20 General Description The STV6688 is a highly-integrated I²C buscontrolled video switch matrix, optimized for use in color TV applications. It is used to control the switching of 4 video signals. These signals can be in Single ponent form (CVBS) or in Two ponent form (Y/C). In both cases, the STV6688 microcontroller provides a CVBS signal for an external device (monitor). Pin Connections Y/CVBS_IN1 C_IN1 VCC_V Y/CVBS_IN2 C_IN2 GND_V Y/CVBS_IN3 C_IN3 VDD SDA 1 2 3 4 5 6 20 19 18 17 16 15 14 13 12 11 DEC Y/CVBS_IN_TV C_IN_TV VCC_B CVBS_OUT GND_B Y/CVBS_OUT C_OUT GND SCL 8 9 10 September 2003 This is preliminary information on a new product now in development. Details are subject to change without notice. 1/12 Functional Description Functional Description Table 1: Pin List Pin 1 2 3 4 5 6 7 8 9 10 Symbol Y/CVBS_IN1 C_IN1 VCC_V Y/CVBS_IN2 C_IN2 GND_V Y/CVBS_IN3 C_IN3 VDD SDA Description Y or CVBS Signal of Ext. Input 1 C Signal of Ext. Input 1 Video Switch Power Supply Y or CVBS Signal of Ext. Input 2 C Signal of Ext. Input 2 Video Switch Ground Y or CVBS Signal of Ext. Input 3 C Signal of Ext. Input 3 Digital Parts Power Supply Serial Data Line Input Pin 11 12 13 14 15 16 17 18 19 20 Symbol SCL GND C_OUT Y/CVBS_OUT GND_B CVBS_OUT VCC B C_IN_TV Y/CVBS_IN_TV DEC Description Serial Clock Line Input Digital Parts Ground C Signal Output Y/CVBS Output Buffer Ground Y and C Adder Output Buffer Power Supply C Signal of TV Input Y or CVBS Signal of...