C4550A2-0275 OCXO Typical Applications SONET/SDH Transmission Systems Features Low Profile, Compact Package Stratum 3E Performance SC-Cut Crystal Description The C4550A2-0275 has been designed to meet the Holdover requirements for a Stratum 3e Clock source as called out in GR-1244-CORE, per Table 3-1 as described in Sections 5.2 and 9.1. Nominal Frequency: 20.000 MHZ Initial Accuracy (Time of Shipment) : ± 1.5 ppm @ Time of Shipment Frequency stabilities Parameter vs. operating temperature range vs. supply voltage vs. short-term vs. holdover / Day vs. aging / 20 Years Value Condition ± 10 ppb < ± 2 ppb 1e-11/sec < ± 1 ppb < ± 2.0 ppm -40°C to +85°C 1% change in voltage Allan Variance 1 sec Tau < ± 3°C change in 24hrs RF output Parameter Waveform Load Duty Cycle Rise/Fall Time Value Condition HCMOS 15 pF 45/55% <10nSec @ 50% level 10% to 90% level Supply Voltage Parameter Supply voltage (Vs) Power consumption steady state Power consumption during warm up Value Condition +3.3VDC ± 10% < 1.5 watts < 3.3 watts @ 25°C Value Condition <-130 dBc/Hz <-145 dBc/Hz <-150 dBc/Hz <-150 dBc/Hz < 3min 100Hz 1KHz 10KHz 100KHz @25°C to final frequency (1 Hour) within ± 0.1ppm Additional Parameters Parameter Phase Noise Warm-up time Vectron International · www.vectron.com Vectron International Headquarters 267 Lowell Road Hudson, New Hampshire 03051 +1-888-328-7661 tel +1-888-329-8328 fax 1-26-11 drs Vectron International LLC. 100 Watts Street Mount Holly Springs, PA 17065 USA +1-717-486-3411 tel +1-717-486-5920 fax v.2011-01-26 · page 1 of 2 Vectron international GmbH & Co. KG Landstrasse D-74924 Neckarbischofsheim Germany +49-07268-801-0 tel +49-07268-801-281 fax Vectron Asia Pacific Sales Office Unit 3119 31st Floor, Jin Mao Tower, 88 Century Boulevard, Shanghai, P.R. China 200120 +86 21 28909740 tel. +86 21 28909240 fax C4550A2-0275 OCXO ADEV 7e-12 8e-12 20e-12 60e-12 1sec tau 10sec tau 100sec tau 1000sec tau 5e-12 50e-12 600e-12 3000e-12 1sec tau 10sec tau 100sec tau 1000sec tau TDEV Notes 1 Unless otherwise stated all values are valid after warm-up time and refer to typical conditions for supply voltage, frequency control voltage, load, temperature (25°C) 2 This is a Zarlink custom part – restricted for Zarlink customers Enclosure Package Codes: Code Height “H” A2 13.40 Pin Length “L” 6.35 MARKING SURFACE "H" MAX TYP 0.64±0.13 "L" .50 TYP 0.76 25.4 0.38 SQ CORNER INDICATES PIN 1 1 2 3 25.4 0.38 11.43 SQ 19.05 SQ 5 4 Dimensions: mm Pin Connections 1 2 3 4 5 RF Output Ground (Case) NC NC Supply Voltage Input (Vs) Vectron International · www.vectron.com Vectron International Headquarters 267 Lowell Road Hudson, New Hampshire 03051 +1-888-328-7661 tel +1-888-329-8328 fax 1-26-11 drs Vectron International LLC. 100 Watts Street Mount Holly Springs, PA 17065 USA +1-717-486-3411 tel +1-717-486-5920 fax v.2011-01-26 · page 2 of 2 Vectron international GmbH & Co. KG Landstrasse D-74924 Neckarbischofsheim Germany +49-07268-801-0 tel +49-07268-801-281 fax Vectron Asia Pacific Sales Office Unit 3119 31st Floor, Jin Mao Tower, 88 Century Boulevard, Shanghai, P.R. China 200120 +86 21 28909740 tel. +86 21 28909240 fax