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| 00W014A Clock generator IC BU2294AF Description The BU2294AF is an IC which produces dual clocks required for a game machine from an external crystal oscillator for PAL and a built-in 2-channel PLL. Three kinds of frequencies; 53.203425MHz, 67.735842MHz and 4.433619MHz can be outputted with low jitter and high S/N. Dimension (Units : mm) SOP8 Features 1) Available with three output clock signals required for a game machine in one chip. 2) All output with low jitter, high S/N 3) No need for additional components, Built-in a PLL loop filter 4) 3.3V single power supply Applications Game machines March, 2000 Absolute Maximum Ratings (Ta=25C) Parameter Power supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VDD Pd Topr Tstg Limits +3.0 ~ +3.6 450 -5 ~ +70 -30 ~ +125 * Unit V mW C C * Derating : 4.5mW/C for operation above Ta=25C. Recommended Operating Conditions (Ta=25C) Parameter Power supply voltage Symbol VDD Min. 3.0 Typ. 3.3 Max. 3.6 Unit V Electrical characteristics (Unless otherwise noted, Ta=25C, Vcc=3.3V, XTAL=17.734475MHz) Parameter Operating circuit current CLKA CLKB CLKC DUTY Jitter Symbol IDD CLKA CLKB CLKC DUTY Jstd1 Min. -- -- -- -- 45 -- Typ. 30 53.203425 67.735842 4.433619 50 -- Max. 50 -- -- -- 55 100 Unit mA MHz MHz MHz % psec No load XTAL 120 20 2 XTAL 275 36 2 XTAL 4 1/2VDD test Short term Jitter 1s, No load Conditions Block Diagram 20divider 17.734475MHz Oscillation circuit Phase Comparator Low-pass filter VCO (Voltage-controlled oscillator) 2divider 53.203425MHz 120divider 106.40685MHz 36divider Phase Comparator Low-pass filter VCO (Voltage-controlled oscillator) 2divider 67.735842MHz 275divider 135.471684MHz 4divider BU2294AF 4.433619MHz |
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