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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

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