dimension (units : mm) description applications features clock generator ic 1) a vailable with seven output clock signals 2) all output low jitter(no load 30ps) high s/n (more than 50db) 3) no need for additional components (BU2285FV has a pll loop filter inside) 4) 3.3v single power supply the BU2285FV is an ic which produces plural clocks required for a dvd system from an external crystal oscillator and a built-in 2-channel pll. seven kinds of signals such as 54mhz, 27mhz and13.5 mhz for a video clock, 33.8688mhz and16.9342mhz for a cd clock, 36.864mhz and 18.432mhz for a dvd clock can be outputted with low jitter and high s/n. ssop-b24 BU2285FV 99w1 10a dvd system december , 1999 * derating : 6.3mw/ ? c for operation above t a=25 ? c. operating temperature range storage temperature range v cc pd t opr t stg v mw ? c ? c 3.0 630 ~ ~ 5 +70 30 +25 * absolute maximum ratings (t a=25 ? c) parameter symbol limits unit 3.6 ~ supply voltage power dissipation
supply voltage v dd v 3.0 3.3 3.6 (unless otherwise noted, t a=25 ? c, vcc=3.3v , xt al=36.864mhz) recommended operating conditions (t a=25 ? c) electrical characteristics parameter symbol unit min. t yp. max. application circuit 1 2 3 4 5 6 7 8 9 10 1 1 12 24 23 22 21 20 19 18 17 16 15 14 13 vdd1 vss1 clk16m a vss a vdd a vdd a vss xt alin xt alout nc l or nc (pull-up) 33.8688mhz or 36.864mhz ctrla clka 0.1 f 16.934mhz 0.1 f 0.1 f 33.8688mhz l or nc (pull-up) 54mhz l or nc (pull-up) 13.5mhz or 27mhz 0.1 f 27mhz 0.1 f 16.9344mhz or 18.432mhz clk33m ctrlb clk54m oe clkdac dvdd dvss dvss clk27m vdd2 vss2 clkb BU2285FV operaing circuit current clk54m clk27m clkdac clk33m clk16m clka clkb duty jitter i dd clk54m clk27m clkdac clk33m clk16m clka clkb duty jstd1 ma mhz mhz mhz mhz mhz mhz mhz % psec 50 55 100 30 54 27 27/13.5 33.8688 16.9344 50 ? ? 45 ? no load xt al 375/128/2 xt al 375/128/4 xt al 375/128/(4 or 8) xt al 147/40/4 xt al 147/40/8 xt al xt al 1 2 1 2 v dd test short term jitter 1 s , no load conditions parameter symbol unit min. t yp. max. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? mhz ? mhz ? xt al 147/40/4 xt al 147/40/8 36.864 33.8688 18.432 16.9344
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