EURO QUARTZ EM44T TCXO CMOS 4 pad SMD, kHz Range 20.0kHz to 52.7kHz Miniature 11.4 x 9.6 x 3.0mm 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 +75°C RoHS compliant EM44T - OUTLINES AND DIMENSIONS DESCRIPTION EM44T 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 +75°C. 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 Output Load:STABILITY Storage Temperature: EM44T VEM44T 32.768kHz Standard frequency 20.0kHz to 50.0kHz Squarewave <1.0ppm (at t. 25°±2°C) <2.0ppm (at t. 25°±2°C) ±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 ( Logic High: 90% Vdd min. Logic Low: 10% Vdd max. 10ns max. 50%±5% 2ms typical, 5ms max. 15pF -55~+125°C VEM44T VOLTAGE CONTROL SPECIFICATION FREQUENCY STABILITY Frequency Stability (ppm) ±0.5 ±1.0 ±1.5 ±2.0 ±2.5 Temperature Range (°C) P 0 ~ +50 ASK P P P P -10 ~ +60 x P P P P -20 ~ +70 x x P P P -30 ~ +75 x x x P PP -40 ~ +85 x x x x P = available, x = not available, ASK = call Technical Sales CURRENT CONSUMPTION Frequency +3.3 V 32.768kHz 8.0mA 50kHz 12mA Control Voltage: Standard = +1.5±1.0Volts for all input voltages. Frequency Deviation: Slope Polarity: ±6.0 ppm min. Positive Input Impedance: 10k min. Modulation Bandwidth: 3.0kHz min. measured at -3dB Linearity: 10% max. PART NUMBERING PROCEDURE Example: EM44T33-32.768k-2.5/-30+75 Series Description TCXO = EM44T VCTCXO = VEM44T 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 [email protected] www.euroquartz.co.uk