00W014A Clock generator IC BU2294AF Description Dimension (Units : mm) 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. 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=25˚C) Parameter Power supply voltage Symbol Limits Unit VDD Pd +3.0 ~ +3.6 Power dissipation Operating temperature range Topr Storage temperature range Tstg V * 450 mW –5 ~ +70 –30 ˚C ~ +125 ˚C * Derating : 4.5mW/˚C for operation above Ta=25˚C. Recommended Operating Conditions (Ta=25˚C) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VDD 3.0 3.3 3.6 V Electrical characteristics (Unless otherwise noted, Ta=25˚C, Vcc=3.3V, XTAL=17.734475MHz) Parameter Operating circuit current Symbol Min. Typ. Max. Conditions Unit IDD — 30 50 mA No load CLKA CLKA — 53.203425 — MHz XTAL ¥ 120 ∏ 20 ∏ 2 CLKB CLKB — 67.735842 — MHz XTAL ¥ 275 ∏ 36 ∏ 2 CLKC CLKC — 4.433619 — MHz XTAL ∏ 4 DUTY DUTY 45 50 55 % Jitter Jstd1 — — 100 psec 1/2VDD test Short term Jitter 1s, No load Block Diagram 20divider Phase Comparator 17.734475MHz Oscillation circuit Low-pass filter 2divider 53.203425MHz 2divider 67.735842MHz 106.40685MHz 120divider 36divider Phase Comparator 275divider VCO (Voltage–controlled oscillator) Low-pass filter VCO (Voltage-controlled oscillator) 135.471684MHz 4divider 4.433619MHz BU2294AF