E2747 ETC2
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Technical content
E2747/E2747LF STRATUM 3 TCXO (-20 to 70°C) 7.0±0.15 5.0±0.15
2.0 Max
1.0 1.00 Pad Connections 1.Do not connect 2.N/C 3.DC Coupled Output (do not connect) 4.GND 5.Output 6.N/C 7.N/C 8.Tri-state Control * 9. +Vs 10.Do not connect, or connect to GND * see text 2.54 0.6 0.80 1.270.8 1.27 Outline in mm ISSUE 4 ; 13 JUNE 2005 Nominal Frequency, Fo ■ 12.8MHz Supply Voltage ■ 3.3V ±5% Input Current ■ < 4mA Output ■ Type: HCMOS ■ Load: 15pF max ■ VoL: <0.1 Vs ■ VoH: >0.9 Vs ■ Duty Cycle @ 50%: 45% to 55% ■ Rise Time, 10% to 90%: < 9ns ■ Fall Time, 90% to 10%: < 9ns Holdover Stability [±(Fmax-Fmin)/2Fo] ■ Temperature, –20 to 70°C: <±0.28ppm ■ Temperature, –20 to 70°C, inclusive of Supply Voltage, 3.3V±5% and Ageing, 24 hours: ±0.32ppm Free-Run Accuracy, incl. ■ Calibration@25°C, Temperature –20 to 70°C, Supply Voltage 3.3V±5% Load 15pF±5%, Reflow Soldering and Ageing 20 years: < ±4.6ppm ref. to Nominal Frequency Phase Noise ■ 10Hz < -90dBc/Hz ■ 100Hz < -1 15dBc/Hz ■ 1kHz < -127dBc/Hz ■ 10kHz < -137dBc/Hz ■ > 100kHz < -143dBc/Hz Tri-State ■ Pad 8 open circuit or > 0.6Vs: Output Enabled ■ Pad 8 < 0.2Vs: Output in Tri-state mode ■ In Tri-state mode, the output stage is disabled but the oscillator and compensation circuit are still active (current consumption < 1mA) Environmental Specification ■ Storage Temperature Range: -55 to 125°C ■ Vibration: IEC 60068-2-6 Test Fc procedure B4, 10-60Hz 1.5mm displacement, at 98.1m/s2, 30 minutes in each of three mutually perpendicular axes at 1 octave per minute ■ Shock: IEC 60068-2-27 Test Ea, 980m/s 2 acceleration for 6ms duration, 3 shocks in each direction along three mutually perpendicular axes ■ Solderability: MIL -STD-202, Method 208, Category 3 ■ Resistance to Soldering Heat: 260°C / 10s exposure ■ Marking: Laser Marked ■ RoHS/Soldering: Parts with the suffix ‘LF’ on the part number are fully compliant with the European Union directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment. Note: The RoHS compliant parts are suitable for assembly using both Lead-free solders (see Lead-free Reflow soldering profile) and Tin / Lead solders (see Tin / Lead Reflow soldering profile). Marking ■ Manufacturers ID (CMAC) ■ Manufacturing Identifier (xx) ■ Pad 1 / Static Sensitivity Identifier (∆) ■ Abbreviated Part Number (2747) ■ Oscillator’s Date of Manufacture (YW) Note: Production parts will be marked in this format. Sample marking may vary CMAC xx ∆ 2747 YW Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Websit e: www.cmac.com Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371 Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990
Lead Free Reflow Soldering Profile * 100 200 300 Time above 217°C: 60 to 150 secs Time 25°C to Peak Temp: 480 sec max 3°C/sec max 150°C to 200°C 60 to 180 seconds Peak Temp 260°C °C 20 to 40 sec Cooldown, 6°C/sec max Tin / Lead Reflow Soldering Profile * 100 200 300 Time above 183°C: 60 to 150 secs Time 25°C to Peak Temp: 360 sec max 3°C/sec max 100°C to 150°C 60 to 120 seconds Peak Temp 240°C °C 10 to 30 sec Cooldown, 6°C/sec max *Note: These profiles were used during the qualification testing of the product and therefore represent worst case conditions. They are not recommended for use by the customer in the actual assembly of these parts Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578 Websit e: www.cmac.com Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371 Asia Tel: +86 755 8826 5991 Fax: +86 755 8826 5990