dimension (units : mm) description applications features clock generator ic 1) a vailable 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 the BU2294AF is an ic which produces dual clocks required for a game machine from an external crystal oscillator for p al 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 BU2294AF 00w014a game machines march, 2000
block diagram * derating : 4.5mw/ ? c for operation above t a=25 ? c. power supply voltage power dissipation operating temperature range storage temperature range v dd pd t opr t stg v mw ? c ? c operating circuit current clka clkb clkc duty jitter i dd clka clkb clkc duty jstd1 ma mhz mhz mhz % psec v dd v 3.0 3.3 3.6 +3.0 ~ +3.6 450 ~ ~ 50 55 100 30 53.203425 67.735842 4.433619 50 45 min. no load xt al 120 20 2 xt al 275 36 2 xt al 4 1/2v dd test short term jitter 1 s , no load 5 +70 30 +125 * (unless otherwise noted, t a=25 ? c, vcc=3.3v , xt al=17.734475mhz) absolute maximum ratings (t a=25 ? c) parameter symbol limits unit recommended operating conditions (t a=25 ? c) electrical characteristics conditions parameter symbol unit t yp. max. parameter symbol unit min. t yp. max. 4 divider 275 divider 36 divider 120 divider 17.734475mhz oscillation circuit 20 divider vco 106.40685mhz 135.471684mhz 2 divider 2 divider phase comparator 53.203425mhz 67.735842mhz 4.433619mhz BU2294AF power supply voltage phase comparator low-pass filter low-pass filter (v oltage controlled oscillator) (v oltage-controlled oscillator) vco
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