MC100EL1648
5 VꢀECL Voltage Controlled
Oscillator Amplifier
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.
http://onsemi.com
MARKING
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.
DIAGRAMS*
8
SOIC−8
D SUFFIX
CASE 751
K1648
ALYW
8
1
1
8
The ECL output circuitry of the MC100EL1648 is not a traditional
open emitter output structure and instead has an on−chip termination
TSSOP−8
DT SUFFIX
CASE 948R
1648
ALYW
emitter resistor, R , with a nominal value of 510 W. This facilitates
8
E
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.
1
1
14
KEL1648
AWLYWW
14
SOIC EIAJ−14
M SUFFIX
CASE 965
NOTE: The MC100EL1648 is NOT useable as a crystal oscillator.
• Typical Operating Frequency Up to 1100 MHz
1
1
• Low−Power 19 mA at 5.0 Vdc Power Supply
• PECL Mode Operating Range: V = 4.2 V to 5.5 V with V = 0 V
CC
EE
A
= Assembly Location
L, WL = Wafer Lot
= Year
W, WW = Work Week
• NECL Mode Operating Range: V = 0 V with V = −4.2 V
CC
EE
Y
to −5.5 V
• Input Capacitance = 6.0 pF (TYP)
*For additional marking information, refer to
Application Note AND8002/D.
V
CC
V
CC
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
BIAS POINT
EXTERNAL
OUTPUT
TANK
TANK
CIRCUIT
V
EE
V
EE
AGC
Figure 1. Logic Diagram
Semiconductor Components Industries, LLC, 2004
1
Publication Order Number:
May, 2004 − Rev. 4
MC100EL1648/D