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MC100EL1648DR2G Datasheet PDF : 16 Pages
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MC100EL1648
5 V ECL 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)
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 W. 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.
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)
• Pb−Free Packages are Available
NOTE: The MC100EL1648 is NOT useable as a crystal oscillator.
VCC VCC
EXTERNAL
TANK
CIRCUIT
BIAS POINT
TANK
OUTPUT
8
1
http://onsemi.com
MARKING
DIAGRAMS*
SOIC−8
D SUFFIX
CASE 751
8
K1648
ALYW
G
1
8
1
14
1
TSSOP−8
DT SUFFIX
CASE 948R
8
1648
ALYWG
G
1
SOEIAJ−14
M SUFFIX
CASE 965
14
KEL1648
ALYWG
1
DFN8
MN SUFFIX
CASE 506AA
14
A
= Assembly Location
L
= Wafer Lot
Y
= Year
W = Work Week
M = Date Code
G or G = Pb−Free Package
(Note: Microdot may be in either location)
*For additional marking information, refer to
Application Note AND8002/D.
VEE VEE AGC
Figure 1. Logic Diagram
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2008
1
August, 2008 − Rev. 8
Publication Order Number:
MC100EL1648/D
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