sm5050a nippon precision circuits? nippon precision circuits inc. single-output clock generator ic overview the sm5050a is a single-output clock generator ic that generates standard high-frequency clocks derived from a 20 to 40mhz crystal oscillator master clock. the high-frequency output stage uses optimized pll cir- cuits for low jitter output. the oscillator capacitors c g and c d are built-in, realizing a high-frequency output oscillator by just the connection of a crystal. two program inputs allows selection from 4 frequency multipli- ers, making the sm5050a able to generate multi-standard frequency clock outputs. features n 2.7 to 3.6v operating supply voltage n 20 to 40mhz master clock frequency (fundamen- tal) n output frequency ranges 100 to 166.6mhz (v dd = v ddq = 3.0 to 3.6v) 100 to 125mhz (v dd = v ddq = 2.7 to 3.6v) n 8ma output drive capability n oscillator capacitors (c g , c d ) and feedback resis- tor (r f ) built-in n 100ps (typ) low jitter output (peak-to-peak) n 2 program inputs for 4 selectable multiplier ratios n standby function n packaging chip form (cf5050a) 8-pin vsop package (sm5050av) pinout ordering information pad dimensions package dimensions (top view ) device package cf5050a? chip form sm5050av 8-pin vsop 1 p1 2 vss 3 q 4 vdd 5 xtn 6xt 7 inhn 8p0 (unit: m) chip size: 2.16 1.57mm chip thic kness: 300 ?30? chip base: v ss level (unit: mm) q vdd xtn vss (0,0) (2160,1570) inhn xt sa5050a vddq vssq p1 p0 0.575 typ 3.1 0.3 1.15 0.05 4.4 0.2 6.4 0.3 0.5 0.2 0.1 0.05 0.22 0.1 0.65 0.12 m 0.10 0 to 10 0.15 + 0.1 - 0.05
sm5050a nippon precision circuits? block diagram pin description sm5050av cf5050a i/o 1 1. ip = input with b uilt-in pull-up resistor. description number name name pad dimensions [?] xy 1 p1 p1 620 1330 ip program input 1. selects the output frequency m ultiplier r atio. 2 vss vss 290 1132 ground vssq 290 920 output circuit g round 3 q q 290 569 o output (cmos) 4 vdd vddq 540 240 output circuit supply vdd 906 240 supply 5 xtn xtn 1524 240 o crystal oscillator connection pins. crystal connected betw een xt and xtn. 6 xt xt 1870 542 i 7 inhn inhn 1870 1015 ip operating state control (inhibit). when inhn is low, output is high impedance and pll circuits stop. 8 p0 p0 1540 1330 ip program input 0. selects the output frequency m ultiplier r atio. vco xt xtn lpf q p0 p1 inhn phase detector charge pump oscillator r-counter duty control circuit output buffer n-counter control circuit vddq vdd vssq vss
sm5050a nippon precision circuits? output frequency settings note: the output frequency range is 100 to 166.6mhz. the master clock frequency can be adjusted to any v alue within the r ange 20 to 40mhz, so the master clock frequency and m ultiplier should be selected such that the output frequency is within the output frequency r ange. specifications absolute maximum ratings v ss = 0v recommended operating conditions v ss = 0v, f out = 100 to 166.6mhz, c l = 15pf program inputs multiplier ratio master clock frequency [mhz] output frequency [mhz] supply v oltage [v] p0 p1 low low 4 25.00 100 2.7 to 3.6 low high 4.25 25.00 106.25 high low 5 25.00 125 26.66 133.3 3.0 to 3.6 high high 6.25 24.8832 155.52 26.66 166.6 parameter symbol condition rating unit supply v oltage r ange v dd - 0.5 to 6.0 v input voltage r ange v in - 0.5 to v dd + 0.5 v output v oltage r ange v out - 0.5 to v dd + 0.5 v stor age temper ature r ange t stg cf5050a - 65 to 150 c sm5050av - 55 to 125 c oper ating temper ature r ange t opr - 40 to 85 c output current i out 25 ma pow er dissipation p d sm5050av 150 m w parameter symbol condition rating unit min typ max oper ating supply voltage v dd f out 125mhz 2.7 3.6 v f out 166.6mhz 3.0 3.6 input voltage v in v ss ? dd v oper ating temperature t opr - 20 80 c
sm5050a nippon precision circuits? dc characteristics v dd = 2.7 to 3.6v, v ss = 0v, ta = - 20 to 80 c unless otherwise noted parameter symbol condition rating unit min typ max q high-level output v oltage v oh v dd = 2.7v, i oh = 8ma 2.2 v q low -level output v oltage v ol v dd = 2.7v, i ol = 8ma 0.4 v q output leakage current i z measurement circuit 4, inhn = v ss v oh = v dd 10 ? v ol = v ss 10 inhn high-level input v oltage v ih1 0.7v dd v p0, p1 high-level input v oltage v ih2 0.9v dd v inhn low -level input v oltage v il1 0.3v dd v p0, p1 low -level input v oltage v il2 0.1v dd v current consumption i dd 25mhz cr ystal, measurement circuit 1, load circuit 1, inhn = open, c l = 15pf, p0 = high, p1 = low, v dd = 3.0v ?3 ma 25mhz cr ystal, measurement circuit 1, load circuit 1, inhn = open, c l = 15pf, p0 = high, p1 = low 42 standby current i st inhn = v ss , measurement circuit 1 40 a inhn, p0, p1 input pull-up resistance r up1 v dd = 3v, measurement circuit 2 0.3 6 m w r up2 10 200 k w negative resistance - r l v dd = 3v, ta = 25 c, f = 30mhz - 240 w feedback resistance r f measurement circuit 3 100 300 900 k w inte rnal capacitance c g design values 15.98 18.44 20.90 pf c d 15.98 18.44 20.90 pf
sm5050a nippon precision circuits? switching characteristics v dd = 2.7 to 3.6v, v ss = 0v, ta = - 20 to 80 c unless otherwise noted npc standard crystal data parameter symbol condition rating unit min typ max output rise time t r 0.2v dd ? 0.8v dd , measurement circuit 1, load circuit 1, c l = 15pf 1 2.5 ns output f all time t f 0.8v dd ? 0.2v dd , measurement circuit 1, load circuit 1, c l = 15pf 1 2.5 ns output duty cycle duty v dd = 3v, ta = 25 c, measurement circuit 1, load circuit 1, c l = 15pf, f 166.6mhz 40?0% output disable delay time 1 1. time from when inhn goes low until q output goes high impedance. t plz v dd = 3v, ta = 25 c, measurement circuit 1, load circuit 1, c l = 15pf 100 ns startup time 2,3 2. time from when either inhn goes low to high or supply v oltage v dd = 3.0v until normal signal output. t szl v dd = 3v, ta = 25 c, measurement circuit 1, load circuit 1, c l = 15pf ? ms oscillator frequency f measurement circuit 1 20 40 mhz output frequency f out measurement circuit 1 v dd = 2.7v 100 125 mhz v dd = 3.0v 100 166.6 output clock jitter 3 3. measured v alues using npc char acteristics standard ev aluation board and standard cr ystal. jitter v dd = 3v, ta = 25 c, 25mhz cr ystal, p0 = high, p1 = low, measurement circuit 1, load circuit 1,c l = 15pf, peak-to-peak 100 ps f (mhz) r ( w ) l (mh) ca (ff) cb (pf) 25 4.368 1.885 21.52 4.793 27 7.421 2.402 14.48 4.097 l ca r cb
sm5050a nippon precision circuits? measurement circuits measurement circuit 1 measurement circuit 2 measurement circuit 3 measurement circuit 4 load circuit 1 vddq vssq xt q x'tal xtn inhn i dd i st a vss vdd vddq vssq p0, p1, inhn vss vdd i pr v ih v il v dd i pr (v il = 0v) r up2 = i pr v dd = 3.0v v ih = 2.1v v dd v ih r up1 = 3.0v v a vddq vssq xt xtn a vss vdd i rf r f = v dd i rf vddq vssq q inhn a vss vdd i z v oh v ol v i z q output c l : 15pf (including probe capacitance)
sm5050a nippon precision circuits? switching time measurement waveforms output duty level output duty cycle time output disable delay time/startup time 0.8v dd 0.2v dd 0.8v dd 0.2v dd t r t f q output duty measurement voltage (0.5v dd ) t w duty measurement voltage ( 0.5v dd ) q output t w t duty= t w / t 100 (%) q output inhn v il t plz inhn input waveform t r = t f 10ns v ih t szl hi-z
sm5050a nippon precision circuits? nippon precision circuits inc. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. nippon precision circuits inc. assumes no responsibility fo r the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infr ingement. applications for any devices shown in this data sheet are for illustr ation only and nippon precision circuits inc. makes no claim or warranty that such applications will be suitable for the use speci?d without further testing o r modi?ation. the products described in this data sheet are not intended to use for the apparatus which in uence human lives due to the failure or malfunction of the products. customers are requested to comply with applicable laws and regulations in effect now and hereinaft er, including compliance with export controls on the distribution or dissemination of the products. customers shall not e xport, directly or indirectly, any products without ?st obtaining required licenses and approv als from appropriate gover nment agencies. nippon precision circuits inc. 4-3, fukuzumi 2-chome koto-ku, tokyo 135-8430, j apan telephone: 03-3642-6661 facsimile: 03-3642-6698 nc9921ae 2000.07 nippon precision circuits inc.
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