BA7230LS Datasheet | ROHM

Features - 1) Allows superimposition of video images (VIDEO IN) and puter images (RGB IN). 2) During superimposition, the subcarrier locked onto the video input burst signal RGB is modulated with the RGB signals by the APC circuit, preventing unnatural color disturbance due to switching. 3) Both the RGB and video input signals are pedestalclamped, maintaining a natural image even during fluctuation in luminosity. 4) Using a half down pulse, the video signal can be reduced by 5d B to darken the background and make the superimposed RGB image easier to see. 5) Carrier leak is suppressible to less than 70m VP-P (VOUT = 2VP-P) without adjustment. 6) Can be adapted for analog RGB input. 7) pact 24-pin SZIP package minimizes external ponents. - Block diagram BA7230LS VIDEO OUT 1 2 SYNC IN Y IN R-Y IN + + B-Y IN BURST LEVEL ADJUSTMENT VB VC VA VCXO 10 BFP IN APC PHASE 11 ADJUSTMENT AR 13 12 PD 14 AG AB 15 MATRIX B-Y OUT 17 B-Y GND 19 HD PCP IN 21 22 HDP IN 20 VIDEO IN 16 Y OUT R-Y 18 R-Y OUT YSP IN 23 VCC 24 VCC Multimedia ICs - Input / output circuits 3 3.2V CLAMP 500Ω 1kΩ 2V 9.1kΩ 10kΩ 15kΩ 2 1 2.2V 24 23 22 15kΩ 7.5kΩ 15kΩ 10kΩ 15kΩ 10kΩ CLAMP 1kΩ 2V 500Ω GND 6 1V 4 5.6kΩ VCC 21 10kΩ VCC 1kΩ 7 6.8kΩ 2.7V 1.2kΩ 4.3kΩ 8 3.4V 1kΩ 5.1kΩ 11kΩ 1kΩ 9 5kΩ...