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| 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 circuit design. The internal fundamental quartz crystal determines the frequency of operation. Custom frequencies are available. Contact the factory for availability. The DS4077 is designed for use with applications requiring low phase noise and jitter. Jitter performance of better 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. 77.76MHz (fNOM) Frequency 3.135V to 3.465V Operation Low Jitter: <1ps RMS 69ppm Absolute Pull Range (APR) LVCMOS Output Buffer Minimum 110ppm Tuning Range (+25C) Available in Commercial or Industrial Temperature Ranges 14mm x 9mm x 3.06mm Plastic LGA Package Features DS4077 Applications Clock-Data Recovery in Telecom/Datacom Applications Data Retiming Reference Clock Generation in Base Stations and Wireless Applications PART DS4077L-0C0 Ordering Information TEMP RANGE 0C to +70C PINPACKAGE 9 LGA 9 LGA TOP MARK* DS4077L-0C0 DS4077L-0CN DS4077L-0CN -40C to +85C *The top mark includes an "N" for industrial temperature grade devices. Pin Configuration TOP VIEW N.C. 9 N.C. 8 N.C. 7 CRYSTAL Block Diagram VDD X1 OSC X2 LVCMOS OUTPUT VC 1 N.C. 2 VSS 3 6 5 4 VDD N.C. LVCMOS VC CONTROL VARACTOR DS4077 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. 77.76MHz VCXO DS4077 ABSOLUTE MAXIMUM RATINGS VC, VDD, LVCMOS Output .......................................-0.3V, +3.6V Operating Temperature Range (noncondensing) ..............................................-40C to +85C Junction Temperature ......................................................+150C Thermal Resistance Junction to Ambient .................................................91.06C/W Junction to Case ......................................................44.51C/W Storage Temperature Range .............................-55C to +125C Soldering Temperature (reflow, 2 passes max)....See IPC/JEDEC STD-020 Specification Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (VDD = 3.135V to 3.465V, TA = -40C to +85C or 0C to +70C, unless otherwise noted.) (Typical values at +25C, VDD = 3.3V, unless otherwise noted.) (Note 1) PARAMETER VDD Operating Supply Range VDD Supply Current Frequency Frequency vs. VDD Sensitivity Frequency vs. Load Sensitivity Frequency vs. Temperature VC Voltage Range Frequency Tuning Sensitivity Tuning Voltage Bandwidth Absolute Pull Range VC Input Leakage Aging, First Year Aging, Years 0-10 SYMBOL VDD IDD fOUT VDDppm LOADpmm TEMPppm VCRANGE VCSEN VCBW fTUNE ILCV AGEppm tAGE Total aging (Note 3) (Note 2) VC = 0.3V to 2.8V, LOAD = 10pF VC = 0V to VDD Output open VC = 1.6V, VDD = 3.3V, TA = +25C, LOAD = 10pF VDD = 3.3V 5% 10pF to 20pF (Note 2) From +25C -20 0.3 41 10 -69 -500 -5 -10 +69 +500 +5 +10 1.60 fNOM -8ppm -3.5 -1 +20 2.8 164 CONDITIONS MIN 3.135 TYP 3.3 20 fNOM MAX 3.465 30 fNOM +8ppm +11.5 UNITS V mA MHz ppm ppm ppm V ppm/V kHz ppm nA ppm ppm 2 _____________________________________________________________________ 77.76MHz VCXO ELECTRICAL CHARACTERISTICS (continued) (VDD = 3.135V to 3.465V, TA = -40C to +85C or 0C to +70C, unless otherwise noted.) (Typical values at +25C, VDD = 3.3V, unless otherwise noted.) (Note 1) PARAMETER LVCMOS OUTPUT Output Logic 0 Output Logic 1 Output Rise Time Output Fall Time Duty Cycle Harmonics 10Hz Offset 100Hz Offset 1kHz Offset 10kHz Offset 100kHz Offset Jitter (12kHz to 80MHz) LVCMOS VOL VOH tR tF DCYC H Output Current -450A Output Current +450A Load condition: 10pF to ground; 10% to 90% VDD (Note 2) Load condition: 10pF to ground; 90% to 10% VDD (Note 2) Load condition: 10pF, VDD / 2 (Note 2) VDD = 3.3V, TA = +25C (Note 2) 40 -18 -74 -105 -130 -147 -150 1 psRMS dBc/Hz 0 VDD 0.8V 0.4 VDD 2 2 60 -8 V V ns ns % dBc/Hz SYMBOL CONDITIONS MIN TYP MAX UNITS DS4077 SSB PHASE NOISE AND JITTER, VDD = 3.3, TA = +25C (Note 2) Note 1: Limits at -40C are guaranteed by design and not production tested. Note 2: Guaranteed by design and not production tested. Note 3: Tuning linearity typically better than 10%. Pin Description PIN 1 2, 5, 7, 8, 9 3 4 6 NAME VC N.C. VSS LVCMOS VDD VCXO Control Voltage No Connection Ground LVCMOS Output DC Power FUNCTION _____________________________________________________________________ 3 77.76MHz VCXO DS4077 Typical Operating Characteristics (VCC = +3.3V, TA = +25C, unless otherwise noted.) OUTPUT FREQUENCY vs. LOAD CAPACITANCE vs. VC DS4077 toc01 FREQUENCY vs. TEMPERATURE 10 8 6 fOUT DEVIATION (ppm) 4 2 0 -2 -4 -6 -8 -10 -40 -20 40 TEMPERATURE (C) 0 20 60 80 fOUT = 77.76MHz 150 125 100 fOUT DEVIATION (ppm) 75 50 25 0 -25 -50 -75 -100 -125 0.3 fOUT = 77.76MHz CL = 0pF CL = 20pF 0.8 1.3 VC (V) 1.8 2.3 2.8 OUTPUT FREQUENCY vs. SUPPLY VOLTAGE vs. VC fOUT DEVIATION FROM VDD = 3.3V (ppm) 15 10 5 0 -5 VC = 1.6V -10 -15 -20 3.135 3.190 VC = 2.8V VC = 0.3V fOUT = 77.76MHz TA = +25C DS4077 toc03 20 3.245 3.300 3.355 VDD (V) 3.410 3.465 Package Information (For the latest package information, go to www.maxim-ic.com/DallasPackInfo and click on package drawing 56-G6034-001.) Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. is a registered trademark of Dallas Semiconductor Corporation. DS4077 toc02 |
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