BU2192F

Multimedia ICs Clock generator for personal computers BU2192F The BU2192F is a clock generator IC for personal computers, and uses a single crystal resonator to generate the three clock signals needed for personal computers. Applications Personal computers Features 1) Clock signals of two different types can be generated with a single attached crystal generator. 2) Internal PLL loop filter, eliminating the need for an attached component. 3) Single 5V power supply. 4) SOP 8-pin package. Block diagram XTAL1 14.3181MHz XTAL OSC CLK1 1/2 PLL1 DATA1 33.8680MHz CLK2 1/4 DATA2 PLL2 24.5795MHz VREF 1 Multimedia ICs BU2192F Pin descriptions Pin No. 1 2 3 4 5 6 7 8 Pin name CLK2 GND XTAL I N.C. CLK1 N.C. DVDD AVDD Digital power supply Analog power supply Clock output 1 (f1 = 33.8680MHz) — Clock output 2 (f2 = 24.5795MHz) GND Reference oscillation input — Function Circuit A — B — A — — — Input / output circuits Type A Type B Pin From inside Pin To inside 15 3 Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Input voltage Storage temperature Power dissipation Symbol VDD VIN Tstg Pd Limits – 0.5 ~ + 7.0 – 0.5 ~ VDD + 0.5 – 30 ~ + 125 450∗ Unit V V °C mW ᭺ Do not represent guaranteed performance. ∗ Reduced by 4.5mW for each increase in Ta of 1°C over 25°C. ᭺ Not designed for radiation resistance. Recommended operating conditions (Ta = 25°C) Parameter Power supply voltage Input high level voltage Input low level voltage Operating temperature Outpu...