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MC100EL1648
5 VECL Voltage Controlled
Oscillator Amplifier
Description
The MC100EL1648 is a voltage controlled oscillator amplifier that
requires an external parallel tank circuit consisting of the inductor (L) http://onsemi.com
and capacitor (C). A varactor diode may be incorporated into the tank
circuit to provide a voltage variable input for the oscillator (VCO). MARKING
This device may also be used in many other applications requiring a DIAGRAMS*
fixed frequency clock.
The MC100EL1648 is ideal in applications requiring a local
8
oscillator, systems that include electronic test equipment, and digital
SOIC-8 K1648
high-speed telecommunications.
8 D SUFFIX ALYW
The MC100EL1648 is based on the VCO circuit topology of the CASE 751 G
1
MC1648. The MC100EL1648 uses advanced bipolar process 1
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 8
emitter resistor, RE, with a nominal value of 510 W. This facilitates 8
TSSOP-8 1648
direct ac-coupling of the output signal into a transmission line. DT SUFFIX ALYWG
1 CASE 948R
Because of this output configuration, an external pull-down resistor is G
not required to provide the output with a dc current path. This output is 1
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 14
Receiver/Driver should be used.
SOEIAJ-14 KEL1648
Features M SUFFIX ALYWG
14
CASE 965