ics660 mds 660 e 1 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com digital video clock source description the ics660 provides clock generation and conversion for clock rates commonly needed in digital video equipment, including rates for mpeg, ntsc, pal, and hdtv. the ics660 uses the latest pll technology to provide excellent phase noise and long term jitter performance for superior synchronization and s/n ratio. for audio sampling clocks generated from 27 mhz, use the ics661. please contact ics if you have a requirement for an input and output frequency not included here - we can rapidly modify this product to meet special requirements. features ? packaged in 16-pin tssop ? available in pb-free packaging ? clock or crystal input ? low phase noise ? low jitter ? exact (0 ppm) multiplication ratios ? power-down control ? reference clock output available block diagram pll clock synthesis selin crystal oscillator x2 x1/refin vdd (p2) vddr ref clk gnd (p13) gnd (p6) gnd (p5) s3:0 4 vdd (p3) vddo
digital video clock source mds 660 e 2 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com ics660 pin assignment 16-pin 4.40 mil body, 0.65 mm pitch tssop output clock selection table pin descriptions 12 1 11 2 10 x1/refin x2 3 9 vdd 4 vdd ref 5 s0 6 vddr 7 gnd 8 gnd gnd selin vddo s3 s1 s2 clk 16 15 14 13 s3 s2 s1 s0 input frequency (mhz) output frequency (mhz) 0000 13.5 74.25 0001 13.5 74.1 75824 0010 27 74.25 0011 27 74.1 75824 0100 pass thru i nput freq 0101 74.25 74.1 75824 011074.1 75824 74.25 0111 power down 1000 16. 9344 27 1001 125 106.25 101014. 3181818 27 1011 106.25 125 1100 27.027 27 1101 27 27.027 1110 27 14. 3181818 1111 27 17.7 3447205 1 1 - 0.16 ppm compared to pal specification pin number pin name pin type pin description 1 x1/refin input connect this pin to a crystal or clock input 2 vdd power power supply for crystal oscillator. 3 vdd power power supply for pll. 4 s0 input output frequency selection. determines output frequency per table above. on chip pull-up. 5 gnd power ground for output stage. 6 gnd power ground for pll. 7 s3 input output frequency selection. determines output frequency per table above. on chip pull-up. 8 s2 input output frequency selection. determines output frequency per table above. on chip pull-up. 9 clk output clock output. 10 s1 input output frequency selection. determines output frequency per table above. on chip pull-up. 11 vddo power power supply for output stage. 12 sel input low for clock input, high for crystal. on chip pull-up. 13 gnd power connect to ground. 14 vddr power power supply for reference output. ground to turn off ref. 15 ref output reference clock output. 16 x2 input connect this pin to a crystal. leave open if using a clock input.
digital video clock source mds 660 e 3 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com ics660 application information series termination resistor clock output traces should use series termination. to series terminate a 50 ? trace (a commonly used trace impedance), place a 33 ? resistor in series with the clock line, as close to the clock output pin as possible. the nominal impedance of the clock output is 20 ? . decoupling capacitors as with any high-performance mixed-signal ic, the ics660 must be isolated from system power supply noise to perform optimally. decoupling capacitors of 0.01f must be connected between each vdd and the pcb ground plane. to further guard against interfering system supply noise, the ics660 should use one common connection to the pcb power plane as shown in the diagram on the next page. the ferrite bead and bulk capacitor help reduce lower frequency noise in the supply that can lead to output clock phase modulation. recommended power supply connection for optimal device performance all power supply pins must be connected to the same voltage, except vddr and vddo, which may be connected to a lower voltage in order to change the output level. if the reference output is not used, ground vddr. crystal load capacitors if a crystal is used, the de vice crystal connections should include pads for capacitors from x1 to ground and from x2 to ground. these capacitors are used to adjust the stray capacitance of the board to match the nominally required crystal load capacitance. to reduce possible noise pickup, use very short pcb traces (and no vias) been the crystal and device. the value of the load capacitors can be roughly determined by the formula c = 2(c l - 6) where c is the load capacitor connected to x1 and x2, and c l is the specified value of the load capacitance for the crystal. a typical crystal c l is 18 pf, so c = 2(18 - 6) = 24 pf. because these capacitors adj ust the stray capacitance of the pcb, check the output frequency using your final layout to see if the value of c should be changed. pcb layout recommendations for optimum device performance and lowest output phase noise, the following guidelines should be observed. 1) each 0.01f decoupling capacitor should be mounted on the component side of the board as close to the vdd pin as possible. no vias should be used between decoupling capacitor and vdd pin. the pcb trace to vdd pin should be kept as short as possible, as should the pcb trace to the ground via. distance of the ferrite bead and bulk decoupling from the device is less critical. 2) the external crystal should be mounted next to the device with short traces. the x1 and x2 traces should not be routed next to each other with minimum spaces, instead they should be separated and away from other traces. 3) to minimize emi, and obtain the best signal integrity, the 33 ? series termination resistor should be placed close to the clock output. 4) an optimum layout is one with all components on the same side of the board, minimizing vias through other signal layers (the ferrite bead and bulk decoupling capacitor can be mounted on the back). other signal traces should be routed away from the ics660. this includes signal traces just underneath the device, or on layers adjacent to the ground plane layer used by the device. connection to 3.3v power plane ferrite bead bulk decoupling capacitor (such as 1 f tantalum) vdd pin vdd pin vdd pin 0.01 f decoupling capacitors
digital video clock source mds 660 e 4 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com ics660 absolute maximum ratings stresses above the ratings listed below can cause perma nent damage to the ics660. these ratings, which are standard values for ics commercially rated parts, are stress ratings only. functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods can affect product reliability. electrical parameters are guaranteed only over the recommended operating temperature range. recommended operation conditions dc electrical characteristics unless stated otherwise, vdd = 3.3 v 10% , ambient temperature -40 to +85 c item rating supply voltage, vdd 5.5 v all inputs and outputs -0.5 v to vdd+0.5 v ambient operating temperature -40 to +85 c storage temperature -65 to +150 c junction temperature 125 c soldering temperature 260 c parameter min. typ. max. units ambient operating temperature -40 +85 c power supply voltage (measured in respect to gnd) +3.0 +3.6 v parameter symbol conditions min. typ. max. units operating voltage vdd 3.0 3.6 v vddo 2.5 vdd v vddr 2.5 vdd v supply current idd no load 25 ma standby supply current iddpd 75 a input high voltage v ih 2v input low voltage v il 0.8 v output high voltage v oh i oh = -4 ma vdd-0.4 v output high voltage v oh i oh = -20 ma 2.4 v output low voltage v ol i ol = 20 ma 0.4 v short circuit current i os each output 65 ma nominal output impedance z out 20 ? input capacitance c in input pins 7 pf internal pull-up resistor r pu 120 k ?
digital video clock source mds 660 e 5 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com ics660 ac electrical characteristics unless stated otherwise, vdd = 3.3 v 10% , ambient temperature -40 to +85 c note 1: selection 1111 is 0.16 ppm lower than the pal specified frequency thermal characteristics parameter symbol conditions min. typ. max. units crystal frequency 28 mhz output clock rise time t or 20% to 80%, 15 pf load 1.5 ns output clock fall time t of 80% to 20%, 15 pf load 1.5 ns output duty cycle t od at vdd/2, 15 pf load 40 49 to 51 60 % power up time t pu inputs out of pd state to clocks stable 10 ms power down time t pd inputs in pd state to clocks off 1 s jitter, short term reference clock off 100 ps p-p jitter, short term reference clock on 125 ps p-p jitter, long term reference clock off; 10 us delay 300 ps p-p jitter, long term reference clock on; 10 us delay 300 ps p-p single sideband phase noise reference clock off; 10 khz offset -110 dbc single sideband phase noise reference clock on; 10 khz offset -110 dbc actual mean frequency error versus target note 1 0 ppm parameter symbol conditions min. typ. max. units thermal resistance junction to ambient ja still air 78 c/w ja 1 m/s air flow 70 c/w ja 3 m/s air flow 68 c/w thermal resistance junction to case jc 37 c/w
digital video clock source mds 660 e 6 revision 040104 integrated circuit systems, inc. 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com ics660 package outline and package dimensions (16-pin tssop, 4.40 mm body, 0.65 mm pitch) package dimensions are kept current with jedec publication no. 95, mo-153 ordering information while the information presented herein has been checked for both accuracy and reliability, integrated circuit systems (ics) assumes no responsibility for either its use or for the infringemen t of any patents or other rights of third parties, which wou ld 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 ex tended temperature range, high re liability, or other extraordina ry environmental requirements are not recomm ended 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 o r critical medical instruments. part / order number marking shipping packaging package temperature ics660gi ics660gi tubes 16-pin tssop -40 to +85 c ICS660GITR ics660gi tape and reel 16-pin tssop -40 to +85 c ics660gilf 660gilf tubes 16-pin tssop -40 to +85 c ics660gilftr 660gilf tape and reel 16-pin tssop -40 to +85 c index area 1 2 16 d e1 e seating plane a 1 a a 2 e - c - b aaa c c l millimeters inches symbol min max min max a--1.20--0.047 a1 0.05 0.15 0.002 0.006 a2 0.80 1.05 0.032 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.0035 0.008 d 4.90 5.1 0.193 0.201 e 6.40 basic 0.252 basic e1 4.30 4.50 0.169 0.177 e 0.65 basic 0.0256 basic l 0.45 0.75 0.018 0.030 0 8 0 8 aaa -- 0.10 -- 0.004
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