1 pi6c20800b features ? ? 4 lvpecl outputs ? ? up to 266mhz output frequency ? ? ultra low additive phase jitter: < 0.03 ps (typ) ? ? two selectable inputs ? ? low delay from input to output (tpd typ. < 1.5ns) ? ? 2.5v / 3.3v power supply ? ? industrial temperature support ? ? tssop-20 package pi6c48535-11c block diagram pin confguration (20-pin tssop) description te pi6c48535-11c is a fanout bufer device with embedded oscillator circuiit which supports up to 266mhz frequency. tis device is ideal for systems that need to generate and distribute low jitter clock signals to multiple destinations. applications ? ? networking systems including switches and routers ? ? high frequency backplane based computing and telecom platforms 4 output lvpecl fanout buffer q0+ pullup in_sel ref_in d le q sync_oe pulldown 0 1 pulldown q0- q1+ q1- q2+ q2- q3+ q3- xtal_in xtal_out osc 1 2 3 ref_in 4 nc 5 in_sel 6 xtal_out 7 v dd 8 xtal_in q0+ v dd q1+ q2+ q2- nc 20 19 18 17 16 15 14 13 gnd sync_oe q1- q0- q3+ 9nc 12 q3- 10v dd 11 www.pericom.com pi6c48535-1 1c rev a 8/31/15 15-0110
2 function table table 1: clock source input select function in_sel function 0 ref_in is the selected reference input 1 xtal_in is the selected reference input table 2: sync_oe select function sync_oe function 0 all outputs disabled. q+ disabled low, q- disabled high. 1 all outputs enabled. pin characteristics symbol parameter min ty p max units r pullup input pullup resistor 51 k r pulldown input pulldown resistor 51 k pin # pin name ty pe description 1 gnd power ground 2 sync_oe input pullup synchronous clock enable. when high, clock outputs follow ref_in. when low, q+ outputs are forced low, q- are forced high 3 in_sel input pulldown clock input source selection pin 4 ref_in input pulldown clock input 5, 8, 9 nc - no connect 6, 7 xtal_in xtal_out input crystal oscillator connection 10, 13, 18 v dd power power supply 11, 12 q3+ q3- output lvpecl output clock 3 14, 15 q2+ q2- output lvpecl output clock 2 16, 17 q1+ q1- output lvpecl output clock 1 19, 20 q0+ q0- output lvpecl output clock 0 pinout table www.pericom.com pi6c48535-1 1c rev a 8/31/15 pi6c48535-11c 4 output lvpecl fanout bufer 15-0110
3 power supply characteristics and operating conditions (t a = -40 to 85 c ) symbol parameter test condition min. ty p. max. units v dd supply voltage 3.135 3.3 3.465 v 2.375 2.5 2.625 v i dd power supply current 85 ma maximum ratings (above which the useful life may be impaired. for user guidelines, not tested) storage temperature ................................................... - 55 to +150oc s upply voltage to ground potential (v dd ) ........... - 0.5 to +4.65v inputs (referenced to gnd) ............................. -0.5 to v dd +0.5v c lock output (referenced to gnd)................. -0.5 to v dd +0.5v l atch up .................................................................................. 200ma esd protection (input) .................................. 2000 v min (hbm) note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. tis is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specifcation is not implied. exposure to absolute maximum rating conditions for extended periods may afect reliability. lvcmos/ lvttl dc characteristics (t a = -40 to 85 c ) symbol parameter test condition min. ty p. max. units v ih input high voltage v dd = v in = 3.465v 2 v dd +0.3 v v dd = v in = 2.625v 1.6 v dd +0.3 v v il input low voltage v dd = v in = 3.465v -0.3 0.8 v v dd = v in = 2.625v -0.3 0.6 v i ih input high current sync_oe v dd = v in = 3.465v 5 a v dd = v in = 2.625v 5 a in_sel v dd = v in = 3.465v 150 a v dd = v in = 2.625v 150 a i il input low current sync_oe v dd = v in = 3.465v -150 a v dd = v in = 2.625v -150 in_sel v dd = v in = 3.465v -5 a v dd = v in = 2.625v -5 www.pericom.com pi6c48535-1 1c rev a 8/31/15 pi6c48535-11c 4 output lvpecl fanout bufer 15-0110
4 dc electrical specifcations- lvpecl outputs (t a = -40 to 85 c ) parameter description conditions min. ty p. max. units v oh output high voltage v dd -1.4 v dd -0.9 v v ol output low voltage v dd -2.0 v dd -1.7 v v swing peak to peak output voltage swing 0.6 1.0 v parameter description conditions min. ty p. max. units f out clock output frequency lvpecl 266 mhz t r output rise time from 20% to 80% 300 700 ps t f output fall time from 80% to 20% 300 700 ps t odc output duty cycle 48 52 % v pp output swing single-ended lvpecl outputs 400 t addjitter bufer additive jitter rms 0.03 ps t sk output skew 4 outputs devices, outputs in same tank, with same load, at dut. 30 ps t pd propagation delay 1450 1600 ps t od valid to hiz 200 ns t oe hiz to valid 200 ns t p2p skew part to part skew 1 tbd ns ac electrical specifcations C differential outputs (t a = -40 to 85 c ) notes: 1. tis parameter is guaranteed by design crystal characteristics parameter test condition min. ty p. max. units mode of oscillation fundamental frequency 12 50 mhz equivalent series resistance (esr) 50 shunt capacitance 7 pf drive level 1 mw www.pericom.com pi6c48535-1 1c rev a 8/31/15 pi6c48535-11c 4 output lvpecl fanout bufer 15-0110
5 confguration test load board termination for lvpecl v 100 150 z = 50 l = 0 ~ 10in 150 device o z = 50 o dd tla tla thermal information symbol description q ja junction-to-ambient thermal resistance 84.0 o c/w q jc junction-to-case thermal resistance 17.0 o c/w www.pericom.com pi6c48535-1 1c rev a 8/31/15 pi6c48535-11c 4 output lvpecl fanout bufer 15-0110
6 ordering information ordering number package code package description operating temperature pi6c48535-11clie l pb-free & green 20-contact tssop -40 to 85 c PI6C48535-11CLIEX l pb-free & green 20-contact tssop, tape and reel -40 to 85 c ? termal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free and green ? x sufx = tape/reel packaging mechanical: 20-contact tssop (l) www.pericom.com pi6c48535-1 1c rev a 8/31/15 pi6c48535-11c 4 output lvpecl fanout bufer 15-0110
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