EURO QUARTZ EM8T Series TCXO HCMOS, 8 pin DIL, MHz Range 8 pin DIL industry-standard, hermetically-sealed package Wide frequency range: 1.25MHz to 156.0MHz Supply voltage 2.8, 3.0, 3.3 or 5.0 Volts Frequency stability from ±1ppm over -30 to +75°C EM8T - OUTLINES AND DIMENSIONS DESCRIPTION EM8T series TCXOs are packaged in the industry-standard 8 pin DIL 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: Standard Frequencies: EM8T VEM8T 1.25MHz to 156.0MHz Squarewave, HCMOS <±1.0ppm at +25°±2°C 10.0, 12.8, 13.0, 14.4, 15.36, 16.384, 19.2, 19.440, 19.68, 25.0, 20.0, 27.0, 38.880, 40.0, 77.760, 125.0, 155.520 (Partial list) See table Operating Temperature Range: Frequency Stability vs. Ageing: vs. Voltage Change: vs. Load Change: vs. Reflow (SMD type): ±1.0 ppm max. first year ±0.3 ppm max. ±5% change ±0.3 ppm max. ±10% change ±1.0ppm max. for one reflow (Measured after 24 hours) ±3ppm minimum +2.8, +3.0, +3.3 or +5.0V (See table) Logic High: 90% Vdd min. Logic Low: 10% Vdd max. 10ns max. 50%±10% standard, 50%±5% option 5ms typical, 10ms max. See table below 15pF -55~+125°C Mechanical Frequency Tuning: Supply Voltage: Output Logic Levels: Rise and Fall Times: Duty Cycle: Start-up Time: Current Consumption: Output Load: Storage Temperature: INPUT VOLTAGE & CURRENT CONSUMPTION Input Voltage/ Frequency +2.8V +3.0 +3.3V +5.0 V 8.192MHz 2mA 2mA 5mA 10.0MHz 3mA 4mA 7mA 77.760MHz 14mA 17mA 32mA 155.520MHz 26mA 35mA 50mA SSB PHASE NOISE at 25°C FREQUENCY STABILITY ±0.5 ±1.0 ±1.5 ±2.0 ±2.5 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 Temperature Range (°C) P Offset Frequency Stability (ppm) = available, x = not available, ASK = call Technical Sales VEM8T VOLTAGE CONTROL SPECIFICATION Control Voltage: Standard = +1.5±1.0Volts for all input voltages. (Contact technical sales if +2.5±2.0 Volts is required.) Frequency Deviation: ±6.0 ppm min. (Vcon = +4.5V±1.0V) Slope Polarity: Positive (increase of control voltage increases output frequency.) Input Impedance: 50k minimum Modulation Bandwidth: 20kHz minimum Linearity: ±10% maximum Part = EM8T33 10Hz 100Hz 1kHz 10kHz 100kHz at 10.0Mhz (dBc/Hz) -115 -135 -148 -152 -155 at 155.250Mhz (dBc/Hz) -72 -110 -125 -132 -125 PART NUMBERING SCHEDULE Example: EM8T33-38.880-2.5/-30+75 Series Description TCXO = EM8GT VCTCXO = VEM8T Supply Voltage 28 = 2.8VDC 3 = 3.0VDC 33 = 3.3 VDC 5 = 5.0 VDC Frequency (MHz) 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