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Details, datasheet, quote on part number:QC6308
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Datasheet text preview:
J LY 1994 QC6308/9USeries
DS3857-1.4
QC6308/9 Series
4 to 25MHz DIGITALLY TEMPERATURE COMPENSATED QUARTZ CRYSTAL OSCILLATORS
T h e QC6308 and QC6309 oscillators have been developed to provide a very stable frequency source with temperature by using digital techniques. They have been designed to overcome one of the main problems associated with conventional DTCXO products, namely poor short term stability - thus enabling them to be used in professional telecommunication applications, eg. GSM. All this has been achieved within the constraints of a standard package size.
FEATURES
I HCMOS/LSTTL Compatible I Compact Size I Very High Stability I Very Low Power Consumption I 6V to 15V (QC6308) or 5V (QC6309) DC Operation I Wide Operating Temperature Range I Standard Footprint I Excellent Short Term Stability
ELECTRICAL SPECIFICATION
Frequency Range Frequency Tolerance Frequency Stability (i) With Temperature -10°C to +70°C -40°C to +85°C ±0.3ppm (with a frequency offset applied at 25°C) ±0.5ppm (with a frequency offset applied at 25°C) ±0.1ppm max ±0.1 ppm max ±1ppm max ±0.5ppm/year max 2ppb max 1ppb max <-130dBC <-142dBC <-80dB QC6308 QC6309 4 to 10MHz 10 to 25MHz 6-15V 5V ±10% 7mA max 15mA max HCMOS and LSTTL compatible HCMOS gates LSTTL gates QC6308 QC6309 (iv) Duty Cycle QC6308 (at 2.5V) QC6309 (at VCC/2) 10 max 5 max Logic `0' Logic `1' Logic `0' Logic `1' 0.5V max 4.5V min 0.1VCC max 0.9VCC min 4 to 25 MHz Tuneable to nominal
(ii) With Supply Voltage (VCC ±10%) (iii) With Load (from 1 gate to 10 gates) (iv) Ageing First year Subsequent years
(v) Short Term Stability (root Allan variance) 100ms sample time 1s sample time Phase Noise Spurii (within 1MHz of carrier) Supply Voltage (VCC) Current Consumption (unloaded) Output (i) Waveform 1kHz from carrier 10kHz from carrier
(ii) Fan Out (iii) Logic Levels
Between 45:55 and 55:45 Between 45:55 and 55:45 15ns max
(v) Rise and Fall Times (between 1.5V and 3.5V)
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QC6308/9 Series
ELECTRICAL SPECIFICATION (continued)
Frequency Adjustment Range Operable Temperature Range Storage Temperature Range Order Code -10°C to +70°C ±0.3ppm -40°C to +85°C ±0.5ppm ±5ppm min -40°C to +85°C -40°C to +105°C QC6308/1A-4A QC6309/1A-4A QC6308/1A-2A QC6309/1A-2A
MECHANICAL SPECIFICATION
Mass (typical) 22g
OUTLINE DRAWING
Pin Connections 1 2 3 4 5 Frequency Adjustment Voltage Reference +ve Supply Frequency Output 0V
R = 10 to 100K Ohms Potentiometer Alternatively, PIN 2 can be left not connected and the oscillator adjusted using an externally sourced voltage applied to PIN 1.
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QC6308/9 Series
MARKING The following information is indelibly marked on the top surface of each device and on each primary package: 1. GPS Logo 2. The type number 3. The nominal output frequency in 'MHz' 4. The offset (Hz) to be applied at 25°C 5. The date code in accordance with Clause 22 of BS9000: Part 1: 1981 6. The primary package is marked to indicate device static sensitivity
GENERAL NOTES
STATIC PRECAUTIONS All quartz crystal oscillators can contain devices which are deemed to be static sensitive. Full handling precautions must be followed at all times when dealing with these devices. Failure to do so may result in damage to the product. A useful guide is BS CECC 00015 : Part 1 : 1991, Protection of Electrostatic Devices.
MECHANICAL PRECAUTIONS
Handling Care must be taken to avoid damage to pins, particularly when glass to metal seals have been used in the manufacture of the device. This can lead to loss of hermeticity which can impair the long term performance of the unit. GPS product is built to withstand normal assembly practices, however, excessive levels of shock or vibration may result in degraded performance or in extreme cases total failure of the product.
ORDERING INFORMATION
When Ordering Please Quote: 1. The series number: QC6308 or QC6309 2. The reference number from the above specification: eg. ref 1A-2A 3. The required frequency Our Sales Desk will be happy to advise upon any other parameters which require more detailed attention.
SPECIFICATION VARIATIONS
In the event that your requirements are not entirely met by this specification you should note that variants of this series are available. Indeed this device can be fully customised to your exact specification. For details of this please contact our Sales Desk.
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