clock oscillators iqd frequency products ltd, station road, crewkerne, somerset ta18 8ar, united kingdom tel: +44 (1460) 270200; fax: +44 (1460) 72578; email: info@iqdfrequencyproducts.com web: www.iqdfrequencyproducts.com cfss-2 spread spectrum clock oscillators issue 5; 27 november 2009 - rohs 2002/95/ec description spread spectrum surface mount oscillators in a ceramic ? package with a hermetically sealed metal lid package outline 7 x 5mm ? frequency range 8 to 170mhz ? output compatibility & load tri-state cmos ? drive capability 15pf max ? frequency stabilities (averaged frequency) 100ppm (inclusive of supply voltage and output load ? variations over the operating temperature range ) operating temperature ranges C10 to 70c ( cfss-2 ) ? C40 to 85c ( cfss-2i ) ? storage temperature range C40 to 85c ? tri-state operation logic 1 to pad 1 (>70% vs) enables oscillator output. ? logic 0 to pad 1 (<30% vs) disables oscillator output, the ? oscillator output goes to a high impedance state. no connection to pad 1 enables oscillator outputs. modulation ratios centre spread 0.25, 0.5%, 0.75%, 1%, 1.5%, 2% ? down spread C0.5%, C1%, C1.5%, C2%, C3%, C4%, ? internal spread spectrum modulation frequency 30khz to 33khz ? spread spectrum enable connection ( pad 2 ) logic 1 to pad 2 (>70% vs), spread spectrum is off. ? logic 0 to pad 2 (<30% vs), spread spectrum is on. ? no connection to pad 1, spread spectrum is on. ? cycle to cycle jitter ( ss on ) 8mhz to <133mhz 400ps max pk-pk ? 133mhz to 170mhz 250ps max pk-pk ? start up time 10ms max ? note: power-up time for all vs to reach minimum specifed voltage 0.05ms ~ 500ms (power ramp must be monotonic) environmental specifcation shock: mil-std-202f, method 213b (1000g, 0.5ms) ? vibration: mil-std-202f, method 204d, cond.d 20g, 10- ? 2000hz, 4 hrs duration in each of 3 mutually perpendicular axis outline (mm) solder pad layout 1.8 2.0 2.54 pad connections 1. enable/disable 2. sson 3. gnd 4. output 5. n/c 6. +vs 1.40.2 5.0 max 7.5 max 1.4 2.6 1 2 3 5 6 4 4.2 5.08 underside view test circuit oscilloscope oscillator 4 3 1 2 frequency counter a power supply v +vs 15pf* +vs *inclusive of jigging and equipment capacitance 5 6 0.01 f marking includes model number + frequency ? packaging loose in bulk pack or tape and reel ? tape & reel in accordance with eia-481-d ? minimum order information required frequency + model number + operating temperature ? code (if applicable) + modulation ratio
clock oscillators iqd frequency products ltd, station road, crewkerne, somerset ta18 8ar, united kingdom tel: +44 (1460) 270200; fax: +44 (1460) 72578; email: info@iqdfrequencyproducts.com web: www.iqdfrequencyproducts.com electrical specifcations - maximum limiting values frequency range frequency stability supply voltage supply current rise time (tr) (20-80%) fall time (tf) (80-20%) duty cycle model number 8.0 to 170.0mhz 100ppm 3.3v 5% 50ma 3ns 3ns 45/55% cfss-2, cfss-2i ordering example 10.0mhz cfss-2 i m 1% c frequency model no. operating temperature code: i = C40 to 85c; not applicable for C10 to 70c modulation ratio: m plus ratio required frequency stability: c = 100ppm example output spectrum (sson) example output spectrum (ssoff)
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