mk2703b mds 2703b d 1 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com pll a udio c lock s ynthesizer description the mk2703b is a low-cost, low-jitter, high performance pll clock synthesizer designed to replace oscillators and pll ci rcuits in set-top box and multimedia systems. using ics? patented analog phase locked loop (pll) techniques, the device uses a 27 mhz crystal or clock input to produce a buffered reference clock and a selectable audio clock. ics manufactures the largest variety of set-top box and multimedia clock synthesizers for all applications. consult ics to eliminate vcxos, crystals and oscillators from your board. features ? packaged in 8-pin soic ? available in rohs compliant package ? uses an inexpensive, fundamental mode crystal or clock ? patented zero ppm synthesis error in all clocks ? all frequencies are frequency locked ? advanced, low power, sub-micron cmos process ? operating voltage of 3.3 v or 5 v ? industrial temperature version available block diagram audio clock pll clock synthesis and control circuitry 27 mhz crystal or clock input vdd crystal oscillator s1:0 x1 x2 27m gnd 2 capacitors are required for crystal tuning
pll a udio c lock s ynthesizer mds 2703b d 2 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com mk2703b pin assignment 8-pin (150 mil) soic a udio c lock o utput s elect t able key: 0 = connect pin directly to ground 1 = connect pin directly to vdd pin descriptions external components decoupling capacitor as with any high-performance mixed-signal ic, the mk2703b must be isolated from system power supply noise to perform optimally. a decoupling capacitor of 0.01f must be connected between vdd and gnd on pins 2 and 3. it must be connected close to the mk2703b to minimize lead inductance. no external power supply filtering is required for the mk2703b. series termination resistor a 33 ? terminating resistor can be used next to the clock outputs for trace lengths over one inch. crystal load capacitors the total on-chip capacitance is approximately 16 pf. a parallel resonant, fundamental mode, at cut 27 mhz crystal should be used. the device crystal connections should include pads for small capacitors from x1 to ground and from x2 to ground. these capacitors are used to adjust the stray capacitance of the board to x1 vdd gnd s0 27m s1 clk x2 1 2 3 4 8 7 6 5 s1 s0 clk (mhz) 0 0 8.192 0 1 11.2896 1 0 12.288 1 1 24.576 pin number pin name pin type pin description 1 x1 xi crystal connection. connect to a 27 mhz fundamental crystal or clock. 2 vdd power connect to +3.3 v or +5 v. 3 gnd power connect to ground. 4 27m output 27 mhz buffered reference clock output. 5 clk output audio clock output per table above. 6 s1 input audio clock frequency select input #1. determines clk output per table above. internal pull-up resistor. 7 s0 input audio clock frequency select input #0. determines clk output per table above. internal pull-up resistor. 8 x2 xo crystal connection to a 27 mhz crystal, or leave unconnected for clock output.
pll a udio c lock s ynthesizer mds 2703b d 3 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com mk2703b match the nominally required crystal load capacitance. because load capacitance can only be increased in this trimming process, it is important to keep stray capacitance to a minimum by using very short pcb traces (and no vias) between the crystal and device. crystal capacitors, if needed, must be connected from each of the pins x1 and x2 to ground. the value (in pf) of these crystal caps should equal (c l -16 pf)*2. in this equation, c l = crystal load capacitance in pf. example: for a crystal with an 18 pf load capacitance, each crystal capacitor would be 4 pf [(18-16) x 2] = 4. absolute maximum ratings stresses above the ratings listed below can cause permanent damage to the mk2703b. 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 vdd=3.3 v 5% , ambient temperature -40 to +85 c, unless stated otherwise item rating supply voltage, vdd -0.5 v to 7 v all inputs and outputs -0.5 v to vdd+0.5 v ambient operating temperature, mk2703bs (commercial) 0 to +70 c ambient operating temperature, mk2703bsi (industrial) -40 to +85 c storage temperature -65 to +150 c soldering temperature 260 c parameter min. typ. max. units ambient operating temperature -40 +85 c power supply voltage (measured in respect to gnd) +3.13 +5.50 v parameter symbol conditions min. typ. max. units operating voltage vdd 3.13 5.50 v input high voltage v ih x1 pin only note 1 (vdd/2)+1 vdd/2 v input low voltage v il x1 pin only note 1 vdd/2 (vdd/2)-1 v input high voltage v ih s0, s1 pins 2.0 v input low voltage v il s0, s1 pins 0.8 v
pll a udio c lock s ynthesizer mds 2703b d 4 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com mk2703b note 1: cmos level input. no minal trigger point is vdd/2 for 3.3 v or 5 v operation ac electrical characteristics vdd = 3.3 v 5% , ambient temperature -40 to +85 c, unless stated otherwise note 1: measured with 15 pf load. thermal characteristics output high voltage v oh i oh = -12 ma 2.4 v output low voltage v ol i ol = 12 ma 0.4 v output high voltage, cmos level v oh i oh = -4 ma vdd-0.4 v operating supply current idd no load vdd = 3.3 v 10 ma short circuit curren t clk output 50 ma input capacitance c in s0, s1 pins 5 pf nominal output impedance 20 ? frequency synthesis error all clocks 0 ppm internal pull-up resistor r pup s1, s0 pins 750 k ? parameter symbol conditions min. typ. max. units input crystal or clock frequency f in 27 mhz output clock rise time t or 0.8 to 2.0 v, note 1 0.7 1.5 ns output clock fall time t of 2.0 to 8.0 v, note 1 0.7 1.5 ns clock stabilization time after power up 10 ms changing frequency setting 10 ms output clock duty cycle at vdd/2, note 1 40 60 % maximum absolute jitter, short term t ja deviation from mean 150 ps parameter symbol conditions min. typ. max. units thermal resistance junction to ambient ja still air 150 c/w ja 1 m/s air flow 140 c/w ja 3 m/s air flow 120 c/w thermal resistance junction to case jc 40 c/w parameter symbol conditions min. typ. max. units
pll a udio c lock s ynthesizer mds 2703b d 5 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com mk2703b marking diagram ? mk2703bs marking diagram ? mk2703bslf marking diagra m ? mk2703bsi marking diagram ? MK2703BSILF notes: 1. ###### is the lot number. 2. yyww is the last two digits of the year and the week number that the part was assembled. 3. ?l? or ?lf? denotes pb (lead) free packaging. 4. ?i? denotes industrial temperature range. 5. bottom marking: (origin). origin = country of origin if not usa. mk2703b ###### yyww 14 5 8 mk2703bl ###### yyww 14 5 8 mk2703bi ###### yyww 14 5 8 2703bil ###### yyww 14 5 8
pll a udio c lock s ynthesizer mds 2703b d 6 revision 042506 integrated circuit systems 525 race street, san jose, ca 95126 tel (408) 297-1201 www.icst.com mk2703b package outline and package dimensions (8-pin soic, 150 mil. narrow body) package dimensions are kept current with jedec publication no. 95 ordering information parts that are ordered with a ?lf? suffix to the part nu mber are the pb-free configur ation and are rohs compliant. 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 mk2703bs see page 5 tubes 8-pin soic 0 to +70 c mk2703bstr tape and reel 8-pin soic 0 to +70 c mk2703bsi tubes 8-pin soic -40 to +85 c mk2703bsitr tape and reel 8-pin soic -40 to +85 c mk2703bslf tubes 8-pin soic 0 to +70 c mk2703bslftr tape and reel 8-pin soic 0 to +70 c MK2703BSILF tubes 8-pin soic -40 to +85 c MK2703BSILFtr tape and reel 8-pin soic -40 to +85 c index area 1 2 8 d e seating plane a1 a e - c - b .10 (.004) c c l h h x 45 *for reference only. cont rolling dimensions in mm. millimeters inches* symbol minmaxminmax a 1.35 1.75 .0532 .0688 a1 0.10 0.25 .0040 .0098 b 0.330.51.013.020 c 0.19 0.25 .0075 .0098 d 4.80 5.00 .1890 .1968 e 3.80 4.00 .1497 .1574 e 1.27 basic 0.050 basic h 5.80 6.20 .2284 .2440 h 0.250.50.010.020 l 0.401.27.016.050 0 8 0 8
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