Rev 0; 8/05 77.76MHz VCXO 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. Features ♦ 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 (+25°C) ♦ Available in Commercial or Industrial Temperature Ranges ♦ 14mm x 9mm x 3.06mm Plastic LGA Package Applications Ordering Information Clock-Data Recovery in Telecom/Datacom Applications PART TEMP RANGE DS4077L-0C0 PINPACKAGE TOP MARK* 0°C to +70°C 9 LGA DS4077L-0C0 Data Retiming DS4077L-0CN -40°C to +85°C 9 LGA DS4077L-0CN Reference Clock Generation in Base Stations and Wireless Applications *The top mark includes an “N” for industrial temperature grade devices. Pin Configuration Block Diagram VDD TOP VIEW N.C. N.C. N.C. 9 8 7 X1 CRYSTAL VC 1 6 VDD N.C. 2 5 N.C. 4 LVCMOS LVCMOS OUTPUT OSC X2 DS4077 VSS 3 VC CONTROL VARACTOR DS4077 LGA (TRANSFER-MOLDED PLASTIC PACKAGE) ______________________________________________ Maxim Integrated Products 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. 1 DS4077 General Description DS4077 77.76MHz VCXO ABSOLUTE MAXIMUM RATINGS VC, VDD, LVCMOS Output .......................................-0.3V, +3.6V Operating Temperature Range (noncondensing) ..............................................-40°C to +85°C Junction Temperature ......................................................+150°C Thermal Resistance Junction to Ambient .................................................91.06°C/W Junction to Case ......................................................44.51°C/W Storage Temperature Range .............................-55°C to +125°C 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 = -40°C to +85°C or 0°C to +70°C, unless otherwise noted.) (Typical values at +25°C, VDD = 3.3V, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS VDD Operating Supply Range VDD VDD Supply Current IDD Output open Frequency fOUT VC = 1.6V, VDD = 3.3V, TA = +25°C, LOAD = 10pF Frequency vs. VDD Sensitivity VDDppm VDD = 3.3V ±5% Frequency vs. Load Sensitivity LOADpmm 10pF to 20pF (Note 2) Frequency vs. Temperature TEMPppm From +25°C VC Voltage Range VCRANGE MIN TYP MAX 3.135 3.3 3.465 V 20 30 mA fNOM fNOM +8ppm MHz +11.5 ppm fNOM –8ppm -3.5 -1 -20 0.3 1.60 UNITS ppm +20 ppm 2.8 V 164 ppm/V ppm Frequency Tuning Sensitivity VCSEN (Note 3) 41 Tuning Voltage Bandwidth VCBW (Note 2) 10 Absolute Pull Range fTUNE VC = 0.3V to 2.8V, LOAD = 10pF -69 +69 VC = 0V to VDD -500 +500 nA -5 +5 ppm -10 +10 ppm VC Input Leakage Aging, First Year Aging, Years 0–10 2 ILCV AGEppm tAGE Total aging _____________________________________________________________________ kHz 77.76MHz VCXO (VDD = 3.135V to 3.465V, TA = -40°C to +85°C or 0°C to +70°C, unless otherwise noted.) (Typical values at +25°C, VDD = 3.3V, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS LVCMOS OUTPUT Output Logic 0 Output Logic 1 VOL VOH Output Current -450µA 0 0.4 V Output Current +450µA VDD 0.8V VDD V Output Rise Time tR Load condition: 10pF to ground; 10% to 90% VDD (Note 2) 2 ns Output Fall Time tF Load condition: 10pF to ground; 90% to 10% VDD (Note 2) 2 ns Duty Cycle DCYC Harmonics H Load condition: 10pF, VDD / 2 (Note 2) 40 VDD = 3.3V, TA = +25°C (Note 2) -18 60 % -8 dBc/Hz SSB PHASE NOISE AND JITTER, VDD = 3.3, TA = +25°C (Note 2) 10Hz Offset -74 100Hz Offset -105 LVCMOS 1kHz Offset -130 10kHz Offset -147 100kHz Offset -150 Jitter (12kHz to 80MHz) 1 dBc/Hz psRMS Note 1: Limits at -40°C 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 NAME FUNCTION 1 VC 2, 5, 7, 8, 9 N.C. VCXO Control Voltage No Connection 3 VSS Ground 4 LVCMOS 6 VDD LVCMOS Output DC Power _____________________________________________________________________ 3 DS4077 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VCC = +3.3V, TA = +25°C, unless otherwise noted.) OUTPUT FREQUENCY vs. LOAD CAPACITANCE vs. VC FREQUENCY vs. TEMPERATURE fOUT = 77.76MHz 125 100 fOUT DEVIATION (ppm) 6 150 DS4077 toc02 fOUT = 77.76MHz 8 DS4077 toc01 10 fOUT DEVIATION (ppm) 4 2 0 -2 -4 50 CL = 20pF 25 0 -25 -50 -6 -75 -100 -10 CL = 0pF 75 -8 -125 -40 -20 0 20 40 TEMPERATURE (°C) 60 80 0.3 0.8 1.3 1.8 2.3 2.8 VC (V) 20 fOUT = 77.76MHz TA = +25°C 15 DS4077 toc03 OUTPUT FREQUENCY vs. SUPPLY VOLTAGE vs. VC fOUT DEVIATION FROM VDD = 3.3V (ppm) DS4077 77.76MHz VCXO 10 VC = 0.3V 5 0 -5 VC = 1.6V -10 VC = 2.8V -15 -20 3.135 3.190 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 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. is a registered trademark of Dallas Semiconductor Corporation.