EPSON_EG-2121 EPSON | Alldatasheet

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Technical content

ç EG2121 LVDS Rev 1.4 35D 2.5V operation LVDS SAW Oscillator EG-2121CA-Lç ♦ Features

  • Generates high frequency clock from a high stability SAW (surface acoustic wave) resonator.
  • 2.5V-LVDS output.
  • Very low jitter/low phase noise.
  • Small SMD in 7x5mm, Max1.4mm height, ceramic package.ç ♦ Applications
  • Gigabit Ethernet, Fibre channel, Infini Band, PCI-express, Rapid IO, Hyper Transport, Memory clock, CPU clock ♦ Absolute Maximum Ratings Item Symbol Unit MIN. TYP. MAX. Condition Supply Voltage V CC V -0.5 +4.0 V CC – GND Storage temperature Tstg °C -40 +100 Stored as bare product Solder heat resistance Tsol Max. 240 °C x Max. 10s x 2 times ♦ Operating range Item Symbol Unit MIN. TYP. MAX. Condition Supply voltage V CC V 2.375 2.5 2.625 0 +70 P version Operating temperature Topr °C -5 +85 R version Output load RL Ω 100 Differential resistor ♦ Frequency characteristics (VCC=2.375 to 2.625,GND=0.0V,Load=100Ω ) Item Symbol Unit MIN. TYP. MAX. Condition Output frequency Range fosc MHz 53.125 700 -100 +100 H version, *1 Frequency Stability df/f0 ppm -50 +50 G version, *1 *1 This includes initial frequency tolerance, temperature, supply voltage variation and loading variation. Please refer to Part Numbering Guide (page3). ♦ Electrical characteristics (VCC=2.375 to 2.625,GND=0.0V,Load=100Ω ) Item Symbol Unit MIN. TYP. MAX. Condition Start up time Tosc ms 10 t=0 at V CC=2.375V 20 30 fosc<=500MHz Current consumption I OP mA 25 35 fosc>500MHz OE High level input voltage V IH V 0.7V CC OE Low level input voltage V IL V 0.3V CC OE High level input current I IH uA 1 OE= V CC OE Low level input current I IL uA -100 -10 OE=GND Differential output voltage V OD mV 247 350 454 V OD1 ,VOD2 Change to VOD dV OD mV 50 dV OD=VOD1 - VOD2 Offset Voltage V OS V 1.125 1.25 1.375 V OS1 ,VOS2 Change to VOS dV OS mV 150 dV OS=VOS1 - VOS2 48 52 V version: <=175MHz 45 55 53.125M to 350MHz Duty at outputs crossing point tw/t % 40 60 >350M Output Rise time t TLH ps 400 20-80% of V OD Output Fall time t THL ps 400 80-20% of V OD UI 0.044x10 53.125 to 700MHz Phase Jitter *2 Offset =12KHz to 20MHz TPJ ps 0.29 1 @156.25MHz tRJ ps 3 4 σ of Random Jitter Period Jitter *3 n=50000 samples tp-p ps 25 40 Peak to Peak of jitter distribution Accumulated Jitter *3 n=2 to 50000 cycles tacc ps 4 5 σ of Total jitter distribution *2 Measured by SSB phase noise test equipment. *3 Measured by Time interval analyzer or oscilloscope. EPSON ELECTRONICS AMERICA, INC. www.eea.epson.com

ç EG2121 LVDS Rev 1.4 35D ♦ Test circuit ♦ Timing chart ♦ External Dimensions ( Unit : mm ) 1.40 E EG-2121 150.000L HPA21MA 7.0 ±0.2 5.081.4 Max 5.0 ±0.20.70 2.60 1.10 #3#2 #2#3 No. Pin Name OE N.C. GND OUT OUT V CC

  • Soldering position (Metallize) 1.600.94 5.08 1.50 3.90 2.40 ç ç Bypass capacitor 0.01 to 0.1 µF By-pass capacitor 10µF Power Supply OUT IOP OE GND Vcc Test Point A OUT NC Test Point 100Ω OE 50Ω Line Impedance Outputs crossing 20% Vcc VOD Differential Voltage GND t tw tTHLtTLH Duty=tw/t x 100 80% OUT OUT VOS Offset Voltage EPSON ELECTRONICS AMERICA, INC. www.eea.epson.com

ç EG2121 LVDS Rev 1.4 35D ♦ Part Numbering Guide *1 Available combination : xHPA, xHPN, xHRA, xHRN, xGPN For xGPA and xGRN stability, please contact Epson. xGRA is not available. *2 V (Duty +/-2%) version is available under 175MHz. ç ♦ Standard Frequency List 53.1250 *3 62.5000 *3 622.0800 625.0000 644.5313 *6 Please round off 5 th digit and specify 4-digit accuracy under decimal point. *3 available only xHPA and xHPN. Nominal frequency: *4=161.1328125MHz, *5=322.265625MHz, *6=644.53125MHz EPSON ELECTRONICS AMERICA, INC. www.eea.epson.com EG-2121CA - 156.2500M - L H P A Stability condition A: Including 10yrs Aging N: Excluding Aging Temperature Range P: 0 to +70C R: - 5 to +85C Frequency Stability H: +/-100ppm G: +/-50ppm Output L: LVDS V: LVDS (Duty +/-2%)*2 Output Frequency : see Standard frequency list