General Description

The DS4077 is an integrated voltage-controlled crystal

oscillator (VCXO) module designed to provide reference

clock generation in base stations, telecom/datacom, and

wireless applications. The DS4077 is developed using a

fundamental quartz crystal plus a unique integrated cir-

cuit design. The internal fundamental quartz crystal

determines the frequency of operation. Custom frequen-

cies are available. Contact the factory for availability.

The DS4077 is designed for use with applications requir-

ing low phase noise and jitter. Jitter performance of bet-

ter than 1ps RMS is achieved over the 12kHz to 80MHz

range. Phase noise performance of better than

-130dBc/Hz at 1kHz is achieved with this design.

Features

♦ 3.135V to 3.465V Operation

♦ Low Jitter: <1ps RMS

♦ ±69ppm Absolute Pull Range (APR)

♦ LVCMOS Output Buffer

♦ Minimum ±110ppm Tuning Range (+25°C)

♦ Available in Commercial or Industrial

Temperature Ranges

♦ 14mm x 9mm x 3.06mm Plastic LGA Package

77.76MHz VCXO

______________________________________________ Maxim Integrated Products

1

N.C.

N.C.

N.C.

N.C.

LVCMOS

1

9

8

7

5

N.C.

VC

(TRANSFER-MOLDED PLASTIC PACKAGE)

LGA

TOP VIEW

2

34

DS4077

Pin Configuration

Applications

Rev 0; 8/05

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

TOP MARK*

DS4077L-0C0

0°C to +70°C

9 LGA

DS4077L-0C0

DS4077L-0CN

-40°C to +85°C

9 LGA

DS4077L-0CN

*The top mark includes an “N” for industrial temperature grade

devices.

Clock-Data Recovery in Telecom/Datacom

Applications

Data Retiming

Reference Clock Generation in Base Stations

and Wireless Applications

Block Diagram

X1

LVCMOS

OUTPUT

VARACTOR

OSC

CONTROL

CRYSTAL

VC

X2

DS4077