CXA1950Q

The CXA1950Q has the following features including Chroma signal band: 1.5MHz (typ.);Sharpness filter;Supports both RGB and Y color difference output;Outputs ACK ON/OFF identification signal;Outputs line alternate signal;Compatible with both NTSC and PAL systems;Low power consumption (120mV, Vcc=5V).

The CXA1950Q is an IC that converts separation signals  into  RGB  signals  or Y  color difference signals, and can be used with both NTSC and PAL systems.Be sure to wire X'tal (crystal oscillator) as close to the IC and as short as possible since fo varies depending on floating capacitance and other factors. Also, take particular care with the routing of the Vcc and GND leads. Use a decoupling capacitor for Vcc and others with a superior performance and attach ii as close to the CXA1950Q as possible.Because the chroma signal band has been extended, carrier leak is greater than in the CXA1585Q.When using this IC, insert a filter with characteristics suited for the application into the output.The sync tip of the video signals input from Pin 24 (Y IN) is clamped and the sync signals are separated. On the basis of the SYNC pulse created here, BF (burst flag), BLK pulse and other timing pulses are generated and supplied to the circuits. The SYNC and BF pulses are output to Pins 15 and 16 via a buffer.

Sony reserves the right to change products and specifications of CXA1950Q without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.The chroma signal whose level has been made constant by ACC AMP is amplified by CHROMA AMP,demodulated by B-Y DEM and R-Y DEM, applied to the Y/C MIX circuit with G-Y created by the resistance matrix, mixed with the luminance signal and then output as the R, G and B primary colors. Y/color difference output is possible by switching Pin 23 (OUTSW) high/low.