The MC100EL1648 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 (V
). 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 include electronic test equipment and digital high-speed telecommunications.
The MC100EL1648 is based on the V
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 resistor with a nominal value of 510 ohms. 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. If the user needs to fanout the signal, an ECL buffer such as the MC10EL16 Line Receiver/Driver should be used

• Typical Operating Frequency Up to 1100 MHz
• Low-Power 19 mA at 5.0 Vdc Power Supply
• Phase Noise -90 dBc/Hz at 25 kHz Typical
• ESD Protection: >2 KV HBM, >100 V MM
• PECL Mode Operating Range: V
• = 5.0 V with V
• = 0 V
• NECL Mode Operating Range: V
• = 0 V with V
• = -5.2 V
• Input Capacitance= 6.0 pF (TYP)
• Meets or Exceeds JEDEC Spec EIA/JESD78 IC Latchup Test
• Maximum Series Resistance for L (External Inductance)= 50
• (TYP)
• Moisture Sensitivity Level 1. For Additional Information, see Application Note AND8003/D
• Flammability Rating: UL-94 code V-0 @ 1/8?, Oxygen Index 28 to 34
• Transistor Count = 11 devices
• Pb-Free Packages are Available