SP1648

Obsolescence Notice This product is obsolete.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