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-3 spread spectrum clock oscillators issue 3; 1 november 2008 - rohs 2002/95/ec description spread spectrum surface mount oscillators in a ceramic ? package with a hermetically sealed metal lid package outline 5 x 3.2mm ? frequency range 12 to 168mhz ? output compatibility & load tri-state cmos ? drive capability 15pf max ? frequency stability (averaged frequency) 50ppm (inclusive of tolerance, supply voltage a ? nd output load variations over the operating temperature range) operating temperature range C10 to 70c ? storage temperature range C40 to 85c ? tri-state operation logic 1 to pad 1 (>80% vs) enables oscillator output ? logic 0 to pad 1 (<20% 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 0.5%, 1%, 2% ? down spread C1%, C2%, C4%, ? cycle to cycle jitter 1s 12mhz to <20mhz 200ps max ? 20mhz to 168mhz 100ps max ? ageing 5ppm max / year ? environmental drop: natural drop, 3 times, from 100cm onto a hard ? wooden plate (30mm thick) vibration: 10 to 55hz, 1.5mm displacement (10hz-36hz), ? 4g (36hz-55hz) sweep time 1min/oct, duration 2hrs for each x, y & z axes marking includes model number + frequency ? packaging bulk or tape and reel ? minimum order information required frequency + model number + modulation ratio + ? frequency stability code outline (mm) 5.00.2 3.20.2 1.050.1 2.6 1.1 1.6 0.7 1 2 4 3 2.6 1.6 1.3 1.0 solder pad layout pad connections 1.enable/disable 2.gnd 3.output 4.+vs test circuit oscilloscope oscillator 2 1 frequency counter a power supply v 15pf * * inclusive of jigging and equipment capacitance +vs +vs 3 4 0.1 f example output spectrum
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) fall time (tf) duty cycle model number 12.0 to < 28.0mhz 50ppm 3.3v 5% 13ma 5ns 5ns 40/60% cfss-3 28.0 to < 80.0mhz 15ma 80.0 to 168.0mhz 30ma ordering example 20.0mhz cfss-3 m 1% b frequency model no. modulation ratio: m plus ratio required frequency stability tape (mm) ?130.5 40 2.2 12.4 ?62 ?20.20.1 ? 180 reel (mm) 1.75 5.5 12.0 2.0 8.0 1.5 4.0 ?1.5 5.3 3.5 ?1.5 0.3
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