Voltage Controlled Oscillator, ECL, 5.0 V

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Overview

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 (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 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 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

NOTE: The MC100EL1648 is NOT useable as a crystal oscillator.

  • 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: VCC= 5.0 V with VEE= 0 V
  • NECL Mode Operating Range: VCC= 0 V with VEE= -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 W (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

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MC100EL1648DG

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Pb

A

H

P

SOIC-8

1

260

TUBE

98

Y

ECL

ECL

1100

5.5

50

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MC100EL1648DTR2G

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Pb

A

H

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TSSOP-8

3

260

REEL

2500

Y

ECL

ECL

1100

5.5

50

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