EURO QUARTZ VEM42T Series TCXO Voltage-Controlled HCMOS 11.4 x 9.6 x 2.5mm SMD SMD package 11.4 x 9.6 x 2.5mm Wide frequency range: 1.6MHz to 156MHz Close tolerance stabilities from 0.5ppm over 0 to +50C 1ppm over -40 to +85C also available EFC tuning 5ppm to 12ppm Supply voltage 2.8 Volts to 5.0 Volts VEM42T - OUTLINES AND DIMENSIONS DESCRIPTION VEM42T series VCTCXOs are packaged in the industry-standard 11.4 x 9.6 x 2.5mm package. Close tolerances are available from 0.5ppm over 0 to 50C or 1ppm over -40 to +85C. The output is controllable by EFC enabling output control of 5ppm to 12ppm. The parts have a 0.01uF decoupling capacitor built-in. SPECIFICATION Product Series Code: Frequency Range: Output Waveform: Standard Frequencies: VEM42T 1.6MHz to 156.0MHz Square wave (HCMOS) 9.6, 10.0, 12.80, 13.0, 14.40, 15.36, 16.384, 19.200, 19.44 and 19.68MHz. (Partial list) See table Operating Temperature Range: Frequency Stability vs. Ageing: vs. Voltage Change: vs. Load Change: vs. Reflow: 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) +2.8 VDC (Code `28') +3.0 VDC (Code `3') +3.3 VDC (Code `33') +5.0 VDC (Code `5') Supply Voltage: Output Voltage Levels Logic `1' HIGH: Logic `0' LOW: Rise & Fall Times: Duty Cycle (Symmetry): Start-up Time: Current Consumption: E.F.C. Tuning: 80% Vdd min. 10% Vdd max. 10ns max. (20%~80%) 50%10% (at 50%Vdd) 10ms max. 30mA max. (Freq. dependent) 5 to 12ppm with Vcon = +1.5V1.0V. Note: All supply versions have +1.5V Vcon. Positive (inc. Vcon = inc. Freq.) 10% max. 15pF See table AC block, DC coupled -50 to +100C Slope Polarity: Linearity: Output Load: SSB Phase Noise: Output Format: Storage Temperature: VEM42T - TEST CIRCUIT FREQUENCY STABILITY OVER TEMPERATURE Frequency Stability (ppm) Temperature Range (C) P 0.5 1.0 1.5 2.0 2.5 0 ~ +50 P P P P P -10 ~ +60 ASK P P P P -20 ~ +70 x P P P P -30 ~ +75 x P P P P -40 ~ +85 x P P P P = available, x = not available, ASK = call Technical Sales = standard specification PHASE NOISE SSB Phase Noise at 25C Offset (Hz) 10 100 1k 10k 100k VEM42T 100MHz (dBc/Hz) -72 -110 -125 -132 -125 VEM42T - PART NUMBERING PROCEDURE Example: VEM42T3-19.44-2.5/-30+75 Series Description Supply Voltage 28 = 2.8 VDC 3 = 3.0 VDC 33 = 3.3 VDC 5 = 5.0 VDC Frequency Stability over OTR (ppm) Operating Temperature Range (OTR) (C) 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