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| EURO QUARTZ Miniature 11.4 x 9.6 x 4.7mm SMD package Frequency range: 20.0 to 50.0kHz; 32.768kHz Supply voltage 3.3 or 5.0 Volts Frequency stability from 1ppm over -30 to +75C RoHS compliant DESCRIPTION EM44GT series TCXOs are packaged in a miniature 4 pad ceramic SMD package. With squarewave (CMOS) output, tolerances are available from 1.0ppm over -30 to +75C. The part has a 0.01mF decoupling capacitor built in. SPECIFICATION Product Series Code TCXO: VCTCXO: Frequency Range: Output Waveform: Initial Calibration Tolerance Models with mech. trimmer: Models without trimmer: Operating Temperature Range: Frequency Stability vs. Ageing: vs. Voltage Change: vs. Load Change: vs. Reflow: Supply Voltage: Output Logic Levels: Rise and Fall Times: Duty Cycle: Start-up Time: Current Consumption: FREQUENCY STABILITY Output Load: Storage Temperature: EM44GT VEM44GT 32.768kHz Standard frequency 20.0kHz to 50.0kHz Squarewave <1.0ppm (at t. 252C) <2.0ppm (at t. 252C) See table 1.0 ppm max. first year 0.3 ppm max. 5% change 0.3 ppm max. 10% change 1ppm max. for one reflow (Measured after 24 hours) +3.3 or +5.0Volts (Specify when ordering) Logic High: 90% Vdd min. Logic Low: 10% Vdd max. 10ns max. 50%5% 2ms typical, 5ms max. See table below 15pF -55~+125C EM44GT Series TCXO HCMOS 4 pad SMD, kHz Range EM44GT - OUTLINES AND DIMENSIONS VEM44GT VOLTAGE CONTROL SPECIFICATION Control Voltage: FREQUENCY STABILITY Frequency Stability (ppm) 0 ~ +50 -10 ~ +60 Temperature Range (C) -20 ~ +70 -30 ~ +75 -40 ~ +85 P 0.5 ASK x x x x 1.0 P P x x x 1.5 P P P x x 2.0 P P P P x 2.5 P P P PP P Standard = +1.51.0Volts for all input voltages. (Contact technical sales if +2.52.0 Volts is required.) Frequency Deviation: 6.0 ppm min. Slope Polarity: Positive (increase of control voltage increases output frequency.) Input Impedance: 10k min. Modulation Bandwidth: 3.0kHz min. measured at -3dB Linearity: 10% max. = available, x = not available, ASK = call Technical Sales PART NUMBERING PROCEDURE Example: CURRENT CONSUMPTION Frequency 32.768kHz 50kHz +3.3 V 8.0mA 12mA EM44GT33-32.768k-2.5/-30+75 Series Description TCXO = EM44GT VCTCXO = VEM44GT Supply Voltage 33 = 3.3 VDC 5 = 5.0 VDC Frequency (kHz) Stability over OTR (ppm) Operating Temperature Range (OTR) (C) Lower and upper limits. EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 info@euroquartz.co.uk www.euroquartz.co.uk |
Price & Availability of VEM44GT5-32768K-25-30
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