ECL OSCILLATOR
Obsolescence Notice
This product is obsolete. This information is available for your convenience only. For more informa...
Description
Obsolescence Notice
This product is obsolete. This information is available for your convenience only. For more information on Zarlink’s obsolete products and replacement product lists, please visit
http://products.zarlink.com/obsolete_products/
JULY 1994
3028-2.1
SP1648
ECL OSCILLATOR
The SP1648 is an emitter-coupled oscillator, constructed on a single monolithic silicon chip. Output levels are compatible with ECL III logic levels. The oscillator requires an external parallel tank circuit consisting of an inductor (L) and capacitor (C). A varactor diode may be incorporated into the tank circuit to provide a voltage variable input for the oscillator (VCO). The device may also be used in phase locked loops and many other applications requiring a fixed or variable frequency clock source of high spectral purity. The SP1648 may be operated from a +5.0V dc supply or a -5.2V dc supply, depending upon system requirements.
TANK V CC 2 V CC 1 OUTPUT
1 2 3 4
8 7 6 5
BIAS POINT V EE 2 V EE 1 AGC
SP1648
Operating temperature range: 0°C to +75°C (Plastic)
Supply voltage +5.0V dc -5.2V dc GND PINS 6,7 2,3 SUPPLY PINS 2,3 6,7
MP8
Fig.1 Pin connections (not to scale) - top view
ORDERING INFORMATION
SP1648 MP (Industrial - Miniature Plastic Package)
ABSOLUTE MAXIMUM RATINGS
Power supply voltage VCC - VEE +8.0V Output source current<40mA AGC input VCC to VEE Storage temperature range-55°C to +150°C (Plastic) Operating junction temperature MP<150°C
ELECTRICAL CHARACTERISTICS
SP164...
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