MOTOROLA MC100EL1648 Technical data

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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 has been realized utilizing Motorola’s MOSAIC III
advanced bipolar process technology which results in a design which can
operate at a much higher frequency than the MC1648 while utilizing half the
current.

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 500 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 20 mA at 5.0 Vdc Power Supply

• 8–Pin SOIC Package

• Phase Noise –90 dBc/Hz at 25 kHz Typical

LOW POWER

VOLTAGE CONTROLLED

OSCILLATOR

SEMICONDUCTOR

TECHNICAL DATA

8

1

D SUFFIX

PLASTIC PACKAGE

CASE 751

(SO–8)

PIN CONNECTIONS

V

GND

GND

AGC

6

5

8

ref

7

BLOCK DIAGRAM

(Typical Test Circuit)

0.1µF

V

in

51K

Ω

VCC = 4.5 to 5.5 V

0.01µF

reserves the right to change or discontinue this product without notice.

MOTOROLA RF/IF DEVICE DATA

0.1µF

7865

V

GND GND AGC

ref

TANK VCCV

100

µ

CCO

2134

F

OUT

0.1µF

* The 1200 Ω resistor
and the scope
termination impedance
constitute a 25:1
attenuator probe.

1200Ω*

0.1µF 0.01µF100µF

F

out

VCCO

1

2

3

4

TANK

V

V

CCO

OUT

CC

(Top View)

ORDERING INFORMATION

Operating

Device

MC100EL1648D TA = –40 to 85°C SO–8

 Motorola, Inc. 1999 Rev 0, 08/1999This document contains information on a product under development. Motorola

Temperature Range

Package

1

MAXIMUM RATINGS

Parameter

Power Supply Voltage, Pins 2, 3 V
Operating Temperature Range T
Storage Temperature Range T

NOTE: ESD data available upon request.

MC100EL1648

Symbol Value Unit

CC

A

stg

–0.5 to 7.0 Vdc

–40 to 85 °C

–65 to 150 °C

ELECTRICAL CHARACTERISTICS (V

Characteristic

Supply Current I
Output Level HIGH (1.0 MΩ Impedance) V
Output Level LOW (1.0 MΩ Impedance) V
CSR @ 25 kHz Offset, 1.0 Hz BW
CSR @ 1.0 MHz Offset, 1.0 Hz BW
SNR (Signal to Noise Ratio from Carrier) SNR – 40 – dB
Frequency Stability Supply Drift Fsts – 3.6 – KHz/mV

Second Harmonic (from Carrier) H2 – –25 – dBc

= 5.0 V; TA = –40 to 85°C, unless otherwise noted.)

CC

Symbol Min Typ Max Unit

CC

OH

OL

L

(f)

L

(f)

Thermal Drift Fstt – 0.1 – KHz/°C

– 19 25 mA

3.95 4.17 4.61 V

3.04 3.41 3.60 V
– –90 – dBc/Hz
– –120 – dBc/Hz

Figure 1. Circuit Schematic

V

CC

2

V

CCO

3

Q10Q11

GND

Q9

Q3 Q2

Q4

Q7 Q6

D1

Q5

D2

6

8

TANK

V

ref

Q8

1

7

GND

5

AGC

Q1

510

4

OUT

Ω

2

MOTOROLA RF/IF DEVICE DATA

MC100EL1648

Figure 2. T ypical Evaluation Results

(CSR MC100EL1648 5.0 Vdc; VCC @ 25°C; 930 MHz CW)

0

–20

–40

–60

dBc/Hz

–80

–100

–120

–140

1K

T ank Component Suppliers

Below are suppliers who manufacture tuning varactors and inductors which can be used to build an external tank circuit.
Motorola has used these varactors and inductors for evaluation purposes, however, there are other vendors who manufacture
similar products.

10K 100K 1M 10M 100M

L

(f) [dBc/Hz] versus f [Hz]

Coilcraft Inductors A01T thru A05T

Coilcraft–Coilcraft, Inc.
1102 Silver Lake Rd.
Gary, Illinois 60013
708–639–6400

Alpha Tuning Diodes DVH6730 Series

Alpha Semiconductor Devices Division
20 Sylvan Road
Woburn, MA 01801
617–935–5150

Loral Tuning Varactors GC1500 Series

Loral
16 Maple Road
Chelmsford, Massachusetts 01824
508–256–8101 or 508–256–4113

* At 1.1 GHz, use a Coilcraft A0IT Springair coil at 2.5 nH and a Loral V aractor 3.0 to 8.0 pF at VIN = 1.0 to 5.0 V.

MOTOROLA RF/IF DEVICE DATA

3

A

C

A1

MC100EL1648

OUTLINE DIMENSIONS

D SUFFIX

PLASTIC PACKAGE

CASE 751–06

(SO–8)

ISSUE T

D

58

0.25MB

E

1

B

e

H

4

M

h

X 45

_

q

C

A

SEATING
PLANE

0.10

L

B

SS

A0.25MCB

NOTES:

1. DIMENSIONING AND TOLERANCING PER ASME
Y14.5M, 1994.

2. DIMENSIONS ARE IN MILLIMETER.

3. DIMENSION D AND E DO NOT INCLUDE MOLD
PROTRUSION.

4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.

5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 TOTAL IN EXCESS
OF THE B DIMENSION AT MAXIMUM MATERIAL
CONDITION.

MILLIMETERS

DIM MIN MAX

A 1.35 1.75

A1 0.10 0.25

B 0.35 0.49
C 0.19 0.25
D 4.80 5.00
E

3.80 4.00

1.27 BSCe

H 5.80 6.20
h

0.25 0.50

L 0.40 1.25

0 7

q

__

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.

How to reach us:
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MOTOROLA RF/IF DEVICE DATA

MC100EL1648/D