SP1648 Datasheet, PDF (2/7 Pages) Zarlink Semiconductor Inc – ECL OSCILLATOR

SP1648
ECL OSCILLATOR
JULY 1994
3028-2.1
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.
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
ORDERING INFORMATION
SP1648 MP (Industrial - Miniature Plastic Package)
TANK
V _CC 2
V _CC 1
OUTPUT
1
8
2
7
SP1648
3
6
4
5
BIAS POINT
V_EE2
V_EE1
AGC
MP8
Fig.1 Pin connections (not to scale) - top view
ABSOLUTE MAXIMUM RATINGS
Power supply voltage V_CC - V_EE +8.0V
Output source current<40mA
AGC input V_CC to V_EE
Storage temperature range-55°C to +150°C (Plastic)
Operating junction temperature MP<150°C