19-4558; Rev 1; 3/10 3.3V Dual-Output LVPECL Clock Oscillator The DS4625 is a dual-output, low-jitter clock oscillator capable of producing frequency output pair combinations ranging from 100MHz to 625MHz. The device combines an AT-cut crystal, an oscillator, and a lownoise phase-locked loop (PLL) in a 5.0mm x 3.2mm surface-mount LCCC package. Standard frequency options are listed in the Ordering Information/Selector Guide table. For custom frequency options, contact the factory at: [email protected]. The DS4625 provides dual, low-voltage, positive emitter-coupled logic (LVPECL) clock output drivers. The output drivers can be enabled and disabled through the OE pin, which is an active-high CMOS input that has an internal pullup resistor. When high, both output pairs are enabled. Features ♦ Standard Clock Output Frequencies: 100MHz, 125MHz, 150MHz, 156.25MHz, and 200MHz ♦ Phase Jitter < 0.7ps RMS (typical) from 12kHz to 20MHz ♦ LVPECL Output ♦ +3.3V ±10% Operating Voltage ♦ -40°C to +85°C Temperature Range ♦ Excellent Power-Supply Noise Rejection ♦ 5.0mm x 3.2mm Ceramic LCCC Package ♦ Output Enable/Disable The device operates from a single +3.3V ±10% supply. The operating temperature range is -40°C to +85°C. Applications XGMII Clock Oscillator InfiniBandTM/SM SAS/SATA PCIe® 1GbE/10GbE Ordering Information/Selector Guide PART TEMP RANGE FREQUENCY (OP1:ON1) (MHz) (fC)* FREQUENCY (OP2:ON2) (MHz) (fC)* PIN-PACKAGE TOP MARK DS4625P+100/100 -40°C to +85°C 100.000 100.000 10 LCCC 6AA DS4625P+100/150 -40°C to +85°C 100.000 150.000 10 LCCC 6AC DS4625P+125/125 -40°C to +85°C 125.000 125.000 10 LCCC 6BB DS4625P+125/156 -40°C to +85°C 125.000 156.250 10 LCCC 6BD DS4625P+150/150 -40°C to +85°C 150.000 150.000 10 LCCC 6CC DS4625P+150/200 -40°C to +85°C 150.000 200.000 10 LCCC 6CE +Denotes a lead(Pb)-free/RoHS-compliant package. The lead finish is JESD97 category e4 (Au over Ni) and is compatible with both lead-based and lead-free soldering processes. *Standard frequency options. Contact the factory at [email protected] for custom frequencies. Pin Configuration and Typical Application Circuit appear at end of data sheet. InfiniBand is a trademark and service mark of the InfiniBand Trade Association. PCIe is a registered trademark of PCI-SIG Corp. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 DS4625 General Description DS4625 3.3V Dual-Output LVPECL Clock Oscillator ABSOLUTE MAXIMUM RATINGS θJA ...................................................................+90°C/W (Note 1) Storage Temperature Range ...............................-55°C to +85°C Lead Temperature (soldering, 10s) .................................+260°C Soldering Temperature (reflow) .......................................+260°C (All voltages referenced to ground unless otherwise noted.) Voltage Range on Any Pin Relative to Ground......-0.3V to +4.0V Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Note 1: Package thermal resistances were obtained using a two-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. 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. RECOMMENDED OPERATING CONDITIONS MIN TYP MAX UNITS Operating Voltage Range PARAMETER SYMBOL VCC CONDITIONS 2.97 3.3 3.63 V Input-Voltage High (OE) VIH 0.7 x VCC VCC V Input-Voltage Low (OE) VIL 0 0.3 x VCC V ELECTRICAL CHARACTERISTICS (VCC = +2.97V to +3.63V, TA = -40°C to +85°C, typical values are at VCC = +3.3V and TA = +25°C, unless otherwise noted.) (Notes 2, 3) PARAMETER Operating Current SYMBOL Startup Time MIN TYP MAX UNITS ICC_PU LVPECL, output unloaded 65 90 mA ICC_PL LVPECL, output loaded 120 140 mA VOE = V IL 80 115 mA VOE = V IH fC MHz (Note 4) 1.0 ms ICC_OEZ Output Frequency CONDITIONS f OUT1 f OUT2 t START Frequency Stability fTOTAL/fC Temperature, aging, load, supply, and initial tolerance (Note 5) -50 +50 ppm Frequency Stability Over Temperature with Initial Tolerance fTEMP/fC VCC = +3.3V -35 +35 ppm +3 ppm/V Initial Tolerance f INITIAL/fC VCC = +3.3V, TA = +25°C Frequency Change Due to VCC f VCC Frequency Change Due to Load Variation fLOAD/fC Aging (15 Years) fAGING/fC OE Pullup Resistance 2 RPU VCC = +3.3V ±10%, TA = +25°C ±20 -3 ±10% variation in termination resistance ±1 -7 TA = +25°C ppm 70 100 _______________________________________________________________________________________ ppm +7 ppm 130 k 3.3V Dual-Output LVPECL Clock Oscillator (VCC = +2.97V to +3.63V, TA = -40°C to +85°C, typical values are at VCC = +3.3V and TA = +25°C, unless otherwise noted.) (Notes 2, 3) PARAMETER SYMBOL CONDITIONS MIN Output High Voltage VOH Output connected to 50 at PECL_BIAS at VCC - 2.0V Output Low Voltage VOL |V OD | Differential Output Voltage TYP MAX UNITS VCC 1.085 VCC 0.88 V Output connected to 50 at PECL_BIAS at VCC - 2.0V VCC 1.825 VCC 1.62 V Output connected to 50 at PECL_BIAS at VCC - 2.0V 0.595 0.710 V ps Output Rise Time tR 20% to 80% 200 Output Fall Time tF 80% to 20% 200 Duty Cycle DCYCLE 45 ps 55 % Propagation Delay from OE Going Low to Output High Impedance t PAZ (See Figure 2) 100 ns Propagation Delay from OE Going High to Output Active t PZA (See Figure 2) 100 ns Jitter JRMS Integrated phase RMS, 12kHz to 20MHz, VCC = +3.3V, TA = +25°C 0.7 ps 125.00MHz output, VCC = +3.3V, TA = +25°C 0.1 ps 10kHz 12.9 ps 100kHz 26.3 ps 200kHz 20.1 ps 1MHz 6.4 ps Accumulated Deterministic Jitter Due to Reference Spurs Accumulated Deterministic Jitter Due to Power-Supply Noise (P-P) (Note 6) Note 2: Note 3: Note 4: Note 5: Note 6: Limits at -40°C are guaranteed by design and are not production tested. AC parameters are guaranteed by design and not production tested. Startup time is from VCC = VCCMIN until PLL locks to the crystal oscillator output. Frequency stability is calculated as: ΔfTOTAL = ΔfTEMP + ΔfVCC x (3.3 x 10%) + ΔfLOAD + ΔfAGING. Supply-induced jitter is the deterministic jitter as measured on a LeCroy SDA11000 measured with a 50mVP-P sine wave forced on VCC. SINGLE-SIDEBAND PHASE NOISE SSB PHASE NOISE (dBc/Hz) (TYPICAL, +25°C, +3.3V) OFFSET fC = 100MHz fC = 125MHz fC = 150MHz fC = 156.25MHz fC = 200MHz 100Hz -71 -85 -84 -79 -85 1kHz -116 -117 -116 -115 -113 -113 10kHz -119 -118 -116 -117 100kHz -126 -125 -122 -123 -120 1MHz -143 -142 -141 -140 -139 10MHz -151 -149 -149 -148 -149 20MHz -151 -150 -149 -149 -150 UNITS dBc/Hz _______________________________________________________________________________________ 3 DS4625 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) fC DEVIATION vs. VCC 30 140 DS4625 toc02 DS4625 toc01 40 ICC vs. VCC 3.0 2.5 130 ICC_PU 120 10 0 -10 -20 2.0 CURRENT (mA) DEVIATION (ppm) 20 1.5 110 100 ONE OUTPUT LOADED 90 80 1.0 ICC_PL 70 -30 DS4625 toc03 fC DEVIATION vs. TEMPERATURE 50 DEVIATION (ppm) DS4625 3.3V Dual-Output LVPECL Clock Oscillator 0.5 60 -40 50 0 -50 -40 -20 0 20 40 60 3.0 3.1 TEMPERATURE (°C) 3.2 3.3 3.4 3.5 3.6 3.0 3.1 3.2 3.3 3.4 3.5 3.6 VCC (V) VCC (V) Pin Description PIN 4 NAME FUNCTION 1 OE 2, 3 GND Ground Active-High Output Enable. Has an internal pullup resistor (RPU). 4 OP1 Positive Output 1 for LVPECL 5 ON1 Negative Output 1 for LVPECL 6 VCC Supply Voltage Input A1, A2 N.C. No Internal Connection. Must be connected to ground. A3 OP2 Positive Output 2 for LVPECL A4 ON2 Negative Output 2 for LVPECL — EP Exposed Pad. The exposed pad must be used for thermal relief. This pad must be connected to ground. _______________________________________________________________________________________ 3.3V Dual-Output LVPECL Clock Oscillator DS4625 VCC VCC RPU X1 OE X0 PLL OP1 LC-VCO PFD X2 DIV M LVPECL LPF ON1 DIV N OP2 DIV P DS4625 LVPECL ON2 GND Figure 1. Block Diagram 0.7 x VCC OE 0.3 x VCC tPZA tPAZ OP_ PECL_BIAS PECL_BIAS PECL_BIAS PECL_BIAS ON_ Figure 2. LVPECL Output Timing Diagram When OE is Enabled and Disabled _______________________________________________________________________________________ 5 3.3V Dual-Output LVPECL Clock Oscillator DS4625 Pin Configuration Detailed Description The DS4625 is a dual-output, low-jitter clock oscillator that produces frequency output pair combinations as shown in the Ordering Information/Selector Guide table. The phase relationship between the outputs is not guaranteed. The device combines an AT-cut, fundamentalmode crystal, an oscillator, and a low-noise PLL in a 5.0mm x 3.2mm surface-mount LCCC package. The DS4625 provides dual LVPECL clock output drivers. The output drivers can be enabled and disabled through the OE pin. The OE pin is an active-high CMOS input that has an internal pullup resistor. When OE is high, both output pairs are enabled. TOP VIEW + OE 1 GND 2 GND 3 N.C. N.C. A1 A2 DS4625 *EP A3 6 VCC 5 ON1 4 OP1 Chip Information A4 PROCESS: Bipolar SiGe OP2 ON2 Package Information For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. (5.00mm × 3.20mm × 1.49mm) *EXPOSED PAD PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 10 LCCC L1053+H2 21-0389 Typical Application Circuit VCC 0.1μF OP1 0.01μF 50Ω PECL_BIAS AT VCC - 2.0V DS4625 50Ω ON1 OE OP2 50Ω PECL_BIAS AT VCC - 2.0V GND 50Ω ON2 6 _______________________________________________________________________________________ 3.3V Dual-Output LVPECL Clock Oscillator REVISION NUMBER REVISION DATE 0 4/09 Initial release. 1 3/10 Changed the operating temperature range limit from +70°C to +85°C, and added a new part number to the Ordering Information table. DESCRIPTION PAGES CHANGED — 1, 2, 3 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 © 2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. DS4625 Revision History