EURO QUARTZ LFXO TF OSCILLATORS Low Power Coinsumption SMD Crystal Oscillator 32.768kHz FEATURES Very low power consumption Tight frequency tolerance CMOS Output Optional output Eanable/Disable with Tri-state Low EMI emission Full military testing available OUTLINE & DIMENSIONS DESCRIPTION The 32.7368kHz LFXO oscillator has been designed especially for applications requiring low power consumption, as low as 500nA. The oscillator consists of a miniature tuning fork quartz crystal and a CMOS/TTL compatible hybrid circuit. Each crystal is pre-qualified before assembly by electrical tests and temperature characterization. SPECIFICATION Specifications are typical at 25°C unless otherwise indicated. Specifications are liable to change without notice. Frequency: 32.768kHz Supply Voltage: 1.8V to +5.0 Volts ±10% Calibration Tolerance: ±10, ±50 or ±100ppm Frequency Stability over Operating Temperature Range 0° ~ +50°C: ±25ppm -40° ~ +85°C: ±100ppm -55° ~ +125°C: ±100ppm Ageing: ±1ppm year typical ±3ppm per year maximum. Shock, Survival: 5000g, 0.3ms, ½ sine Vibration Survival: 20g, 10~2000Hz swept sine Frequency Change vs. 10% Output Load Change: ±1ppm maximum. Operating Temperature Range Commercial: -10° to +70°C Industrial: -40° to +85°C Military: -55° to +125°C Typical Current Consumption Vdd = 1.8V: 0.5µA Vdd = 2.5V: 0.6µA Vdd = 3.3V: 0.7µA Vdd = 5.0V: 1.3µA Output: CMOS Rise/Fall Times: 12ns typical, 25ns maximum Duty Cycle: 45/55% Process Temperature: 260°C, 20 seconds Storage Temperature: -55° to +125°C ENABLE/DISABLE OPTIONS There are two Enable/Disable options available, 'E' and 'N'. The 'E' option stops oscillating when the output is put into the High Z state. the 'N' version does not have Pad 1 connected internally. The table below describes the 'E' Enable/Disable option. Enable (Pad 1 High) Disable (Pad 1 Low) Output Oscillator Current Frequency Output Oscillates Normal High Z state Stops Very Low When Pad 1 is allowed to float it is held high (output enabled) by an internal pull-up resistor. HOW TO ORDER LFXO SMD CRYSTAL OSCILLATORS LFXO TF TF = Low Power 4 Supply Voltage 1 = 1.8V 2 = 2.5V 3 = 3.0V 4 = 3.3V 5 = 5.0V S T Enable/Disable option, T or N Blank = standard S = special or custom - SM3 - Terminations Blank = SM1 =Gold plated SM3 = Solder dipped SM5 = Solder dipped (SM1 and SM5 are pB free) 32.768k Frequency k = kHz 30 Calibration Tolerance at 25°C (in ±ppm) / 30 / – / I Temp. Range C = -10° ~ +70°C I = -40° ~ +85°C M = -55° ~ +125°C S = Customer specified Frequency Stability over Temp. Range (in ppm) OR — / — / 50 Total Frequency Tolerance (in ppm) / I Temp. Range C = -10° ~ +70°C I = -40° ~ +85°C M = -55° ~ +125°C S = Customer specified 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