onsemi | MC100EL1648DG

The MC100EL1648 is a voltage controlled oscillator amplifier that requires an external parallel tank circuit consisting of the 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). This device may also be used in many other applications requiring a fixed frequency clock.

The MC100EL1648 is ideal in applications requiring a local oscillator, systems that include electronic test equipment, and digital high−speed telecommunications. The MC100EL1648 is based on the VCO circuit topology of the MC1648. The MC100EL1648 uses advanced bipolar process technology which results in a design which can operate at an extended frequency range.

The ECL output circuitry of the MC100EL1648 is not a traditional open emitter output structure and instead has an on−chip termination emitter resistor, RE, with a nominal value of 510 Ω. This facilitates direct ac−coupling of the output signal into a transmission line. Because of this output configuration, an external pull−down resistor is not required to provide the output with a dc current path. This output is intended to drive one ECL load (3.0 pF). If the user needs to fanout the signal, an ECL buffer such as the EL16 (EL11, EL14) type Line
Receiver/Driver should be used.

Key Features:

• Typical Operating Frequency Up to 1100 MHz
• Low−Power 19 mA at 5.0 Vdc Power Supply
• PECL Mode Operating Range: VCC = 4.2 V to 5.5 V with VEE = 0 V
• NECL Mode Operating Range: VCC = 0 V with VEE = −4.2 V to −5.5 V
• Input Capacitance = 6.0 pF (TYP)
• Maximum Series Resistance for L (External Inductance)= 50 Ω (TYP)
• Flammability Rating: UL-94 code V-0 @ 1/8, Oxygen Index 28 to 34
• Transistor Count = 11 devices
• Pb−Free Packages are Available

Note:

• The MC100EL1648 is NOT useable as a crystal oscillator.