DS4077 Datasheet, PDF (1/4 Pages) Maxim Integrated Products – 77.76MHz VCXO

Rev 0; 8/05
77.76MHz VCXO
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
♦ 77.76MHz (f_NOM) Frequency
♦ 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
Applications
Clock-Data Recovery in Telecom/Datacom
Applications
Data Retiming
Reference Clock Generation in Base Stations
and Wireless Applications
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
TOP MARK*
DS4077L-0C0 0°C to +70°C 9 LGA
DS4077L-0CN -40°C to +85°C 9 LGA
DS4077L-0C0
DS4077L-0CN
*The top mark includes an “N” for industrial temperature grade
devices.
Pin Configuration
Block Diagram
TOP VIEW
N.C. N.C. N.C.
9
8
7
VC 1
N.C. 2
VSS 3
DS4077
6 VDD
5 N.C.
4 LVCMOS
VDD
CRYSTAL
X1
OSC
X2
LVCMOS
OUTPUT
VC
CONTROL
VARACTOR
LGA
(TRANSFER-MOLDED PLASTIC PACKAGE)
DS4077
______________________________________________ Maxim Integrated Products 1
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.