mk2716 hdtv clock synthesizer mds 2716 b 1 revision 062599 printed 11/16/00 microclock division of ics ?525 race street ?san jose ?ca ?95126?408)295-9800tel?408)295-9818fax i c r o c l o c k ?packaged as 8 pin soic or die ?input frequency of 27 mhz ?zero ppm synthesis error in output clock ?3.3 v or 5.0 v?0% operating supply ?25 ma drive capability at ttl levels ?ideal for hdtv applications and oscillator manufacturers ?advanced, low power cmos process ?custom masks easily and quickly made the mk2716 is a low cost, low jitter, high performance clock synthesizer designed to produce the 74.176 mhz and 74.25 mhz clocks necessary for hdtv systems. using analog phase- locked loop (pll) techniques, the device accepts a 27 mhz clock or fundamental crystal input. the zero ppm synthesis error exactly locks the display to the digital stream. microclock offers a wide variety of clock synthesizers for desktop and portable computers, and multimedia systems. consult microclock to eliminate crystals and oscillators from your board. block diagram description features clock buffer vdd gnd clock synthesis and control circuitry 27 mhz crystal or clock output buffer clk 74.17582418 mhz or 74.2500 mhz 27.0000 mhz output buffer 2 sel x1 x2
mk2716 hdtv clock synthesizer mds 2716 b 2 revision 062599 printed 11/16/00 microclock division of ics ?525 race street ?san jose ?ca ?95126?408)295-9800tel?408)295-9818fax i c r o c l o c k pin assignment number name type description 1 iclk/x1 xi input clock connection. connect to a 27 mhz clock input or 27 mhz fundamental crystal. 2 vdd p connect to +3.3v or +5v. 3 gnd p connect to ground. 4 clk o 74.17582418 mhz or 74.25 mhz clock output (see table above). 5 gnd p connect to ground. 6 sel i select pin determines value of clk per table above. 7 27m o 27 mhz buffered clock or crystal oscillator output. 8 x2 xo connect to 27 mhz crystal, or leave unconnected for clock input. pin descriptions type: i = input; o = output; p = power supply connection; xi, xo = crystal connections 8 pin soic decoupling and external components the mk2716 requires a 0.1? decoupling capacitor to be connected between vdd and gnd on pins 2 and 3. it must be connected close to the mk2716. pin 5 can be connected to pin 3. a 33 w terminating resistor should be placed close to pin 4, and pin 7. if using a crystal input, it should be a 27.00 mhz, parallel resonant, fundamental mode, with load (correlation) capacitance of 18 pf. if the crystal has a load capacitance of 20 pf, connect 4 pf capacitors from x1 and x2 to ground. 1 8 2 3 4 7 6 5 iclk/x1 gnd x2 vdd gnd sel clk 27m sel clk 0 74.17582418 1 74.25 frequency select table (mhz)
mk2716 hdtv clock synthesizer mds 2716 b 3 revision 062599 printed 11/16/00 microclock division of ics ?525 race street ?san jose ?ca ?95126?408)295-9800tel?408)295-9818fax i c r o c l o c k parameter conditions minimum typical maximum units absolute maximum ratings (note 1) absolute maximum ratings (note 1) supply voltage, vdd referenced to gnd 7 v inputs and clock outputs referenced to gnd -0.5 vdd+0.5 v ambient operating temperature 0 70 ? soldering temperature max of 10 seconds 260 ? storage temperature -65 150 ? dc characteristics (vdd = 5v unless noted) dc characteristics (vdd = 5v unless noted) operating voltage, vdd 3.0 5 5.5 v input high voltage, vih 2 v input low voltage, vil 0.8 v output high voltage, voh ioh=-4ma vdd-0.4 v output low voltage, vol iol=25ma 0.4 v operating supply current, idd, 5.0v no load 30 ma short circuit current each output ?0 ma input capacitance 7 pf ac characteristics (vdd = 5v unless noted) ac characteristics (vdd = 5v unless noted) input frequency 27.000 mhz frequency error, output clock 0 ppm output clock rise time 0.8 to 2.0v 1.5 ns output clock fall time 2.0 to 0.8v 1.5 ns output clock duty cycle at 1.4v 40 50 60 % maximum absolute jitter, short term 200 ps electrical specifications notes: 1. stresses beyond those listed under absolute maximum ratings could cause permanent damage to the device. prolonged exposure to levels above the operating limits but below the absolute maximums may affect device reliability. 2. typical values are at 25?.
mk2716 hdtv clock synthesizer mds 2716 b 4 revision 062599 printed 11/16/00 microclock division of ics ?525 race street ?san jose ?ca ?95126?408)295-9800tel?408)295-9818fax i c r o c l o c k while the information presented herein has been checked for both accuracy and reliability, integrated circuit systems, incorporated (ics) assumes no responsibility for either its use or for the infringement of any patents or other rights of third parties, which would result from its use. no other circuits, patents, or licenses are implied. this product is intended for use in normal commercial applications. any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are not recommended without additional processing by ics. ics reserves the right to change any circuitry or specifications without notice. ics does not authorize or warrant any ics product for use in life support devices or critical medical instruments. ordering information part/order number marking package temperature std qty mk2716s mk2716s 8 pin narrow soic 0-70? - MK2716STR mk2716s 8 pin soic on tape and reel 0-70? 2500 pieces package outline and package dimensions inches inches millimeters millimeters symbol min max min max a 0.055 0.068 1.397 1.7272 b 0.013 0.019 0.330 0.483 d 0.185 0.200 4.699 5.080 e 0.150 0.160 3.810 4.064 h 0.225 0.245 5.715 6.223 e .050 bsc .050 bsc 1.27 bsc 1.27 bsc h 0.015 0.381 l 0.016 0.035 0.406 0.889 q 0.004 0.01 0.102 0.254 8 pin soic c a b d e h e h x 45 q pin 1
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