MC12148D Freescale Semiconductor, Inc, MC12148D Datasheet

MC12148D

Manufacturer Part Number

MC12148D

Description

Manufacturer

Freescale Semiconductor, Inc

Datasheet

1.MC12148D.pdf (5 pages)

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Low Power

Voltage Controlled Oscillator

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.

i n c l u d e e l e c t r o n i c t e s t e q u i p m e n t a n d d i g i t a l h i g h – s p e e d

telecommunications.

MC12148 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.

Please consult with the MC1648 data sheet for additional background

information.

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.

The MC12148 requires an external parallel tank circuit consisting of the

The MC12148 is ideal in applications requiring a local oscillator. Systems

The MC12148 is based on the VCO circuit topology of the MC1648. The

The ECL output circuitry of the MC12148 is not a traditional open emitter

NOTE: The MC12148 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

V CC = 4.5 to 5.5 V

VCCO

0.01µF

0.1µF

100µF

GND VCCO Out

V CC

BLOCK DIAGRAM

(Typical Test Circuit)

100

µF

AGC TANK V ref

0.1

µF

1200Ω*

51KΩ

GND

* The 1200 Ω resistor

and the scope

termination impedance

constitute a 25:1

attenuator probe.

V in

F out

0.1µF

MC12148D

MC12148SD

Motorola, Inc. 1997

Device

VOLTAGE CONTROLLED

ORDERING INFORMATION

MC12148

PLASTIC PACKAGE

PIN CONNECTIONS

GND

V CC

SEMICONDUCTOR

Temperature Range

T A = – 40 to +85 C

TECHNICAL DATA

Order this document by MC12148/D

LOW POWER

OSCILLATOR

SD SUFFIX

D SUFFIX

CASE 751

CASE 940

(SSOP–8)

Operating

VCCO

(SO–8)

AGC

(Top View)

TANK

Out

GND

V ref

Package

SSOP–8

SO–8

Rev 5

Related parts for MC12148D

MC12148D Summary of contents

Page 1

... F out 5 * The 1200 Ω resistor GND and the scope termination impedance constitute a 25:1 attenuator probe. 4 0.1µF Device MC12148D V in 51KΩ MC12148SD Motorola, Inc. 1997 Order this document by MC12148/D MC12148 LOW POWER VOLTAGE CONTROLLED OSCILLATOR SEMICONDUCTOR TECHNICAL DATA 8 1 ...

Page 2

MAXIMUM RATINGS Parameter Power Supply Voltage, Pins 1, 7 Operating Temperature Range Storage Temperature Range NOTE: ESD data available upon request. ELECTRICAL CHARACTERISTICS ( 5 – unless otherwise noted.) Characteristic Supply ...

Page 3

MC12148 5.0 Vdc 930 MHz CW) 0 –20 –40 –60 –80 –100 –120 –140 1K 10K Tank Component Suppliers Below are suppliers who manufacture tuning varactors and inductors which can be used to build ...

Page 4

0. 0. REF 0.12 (0.005 L PIN IDENT –U– A –V– ...

Page 5

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 ...

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