BA7078AF-E2 ROHM

BA7078AF Multimedia ICs Synchronization signal processor for high definition displays BA7078AF The BA7078AF is a synchronization signal processing LSI chip designed for multiscan high-definition displays. It generates a synchronization signal and clamp pulse for three types of input signals: separate synchronization, composite synchronization, and synchronization on video. Application CRT displays Features 1) Operates on a single 5V power supply, with low power consumption. 2) Synchronization signal existence and polarity detec-tion output. 3) Adjustable clamp pulse width, allowing for the selec-tion of front or back editing. 4) Vertical synchronization separation is based on hori-zontal frequency tracking, for separation starting at 1H. 5) Minimal attached components. Absolute maximum ratings (Ta = 25C) Parameter Symbol Limits Unit Power supply voltage VCC 7.0 V Power dissipation mW Pd 450 Operating temperature Topr 25~+75 C 55~+125 C Storage temperature Tstg Reduced by 4.5mW for each increase in Ta of 1C over 25C. Recommended operating conditions (Ta = 25C) Parameter Symbol Min. Typ. Max. Unit VCC 4.5 5.0 5.5 V Power supply voltageBA7078AF Multimedia ICs Block diagram 18 HSCTL 1 POLH H SYNC DET. 2 17 C / HSYNC IN EXIH 3 16 VIDEO IN POLV SYNC SEPA. VSEPA 4 15 EXIV HOR. SYNC CONTROL V SYNC SEPA. VSYNC IN 5 14 Vcc CVPOL 6 13 HDRV V SYNC DET. 7 12 CVEXI CLAMP 11 CPSEL 8 VDRV CLAMP PULSE GEN. GND 9 10 CPWID