ECS HC-49/US SERIES MICROPROCESSOR CRYSTALS

If stock is insufficient to meet your needs, please see
potential replacement list below:

ECS            REPLACEMENT         DIFFERENCES

520-HCU357-17    559-FOXS036-S     Load cap of 18pF
                                   instead of 17pF
                 73-XT49S357-20    Load cap of 20pF
                                   instead of 17pF
520-HCU357-S     73-XT49S357-S     No difference
520-HCU368-18    559-FOXS0368S     Load cap of 20pF
                                   instead of 18pF
                 73-XT49S368-20    Load cap of 20pF
                                   instead of 18pF
520-HCU368-S     559FOXS368S       No difference
                 73-XT49S368S      NO difference
520-HCU400-20    559-FOXS040       No difference
                 73-XT49S400-20    NO difference
520-HCU400-S     559-FOXS040A      No difference
                 73-XT49S400-S     NO difference
520-HCU409-30    559-FOXS0496-20   Load cap of 20pF
                                   instead of 30pF
                 73-XT49S409-20    Load cap of 20pF
                                   instead of 30pF
520-HCU419-12    559-FOXS041       No difference
                 73-XT49S419-20    Load cap of 20pF
                                   instead of 12pF
520-HCU443-20    559-FOXS0443      FREQ. DIFF. BY .1
                 73-XT49S443-20    FREQ. DIFF. BY .1
520-HCU491-20    559FOXS049-20     No difference
                 73-XT49S443-20    No difference
520-HCU491-S     559-FOXS049       No difference
520-HCU737-20    559-FOXS073-20    No difference
                 73-XT49S737-20    No difference
520-HCU737-S     559-FOXS073       No difference
520-HCU800-S    559-FOXS080        No difference
                73-XT49S800-S      No difference
520-HCU800-18   559-FOXS080-20     Load cap. of 20pF
                                   instead of 18pF
                73-XT49S800-20     Load cap. of 20pF
                                   instead of 20pF
520-HCU800-20   559-FOXS080-20     No difference
                73-XT49S800-20     NO difference
520-HCU800-32   559-FOXS080-20     Load cap. of 20pF
                                   instead of 32pF
                73-XT49S800-20     Load cap. of 20pF
                                   instead of 32pF
520-HCU921-20   73-XT49S921-20     No difference
520-HCU983-S    559-FOXS098        No difference
520-HCU983-20   559-FOXS098-20     No difference
520-HCU1000-S   559-FOXS100        No difference
                73-XT49S1000-S     No difference
520-HCU1105-20  559-FOXS115-20     No difference
                73-XT49S1105-20    No difference
520-HCU1105-32  559-FOXS115-20     Load cap. of 20pF
                                   instead of 32pF
                73-XT49S1105-20    Load cap. of 20pF
                                   instead of 32pF
520-HCU1105-S   559-FOXS115        No difference
                73-XT49S1105-S     No difference
520-HCU1200-S   559-FOXS120        No difference
                73-XT49S1200-S     No difference
520-HCU1200-32  559-FOXS120-20     Load cap of 20pF
                                   instead of 32pF
                73-XT49S1200-20    Load cap of 20pF
                                   instead of 32pF
520-HCU1228-S   559-FOXS128        No difference
520-HCU1431-S   559-FOXS143        No difference
                73-XT49S1431-S     No difference
520-HCU1474-20  559-FOXS147-20     No difference
                73-XT49S1474-20    No difference
520-HCU1474-S   559-FOXS147        No difference
520-HCU1600-20  559-FOXS160-20     No difference
                73-XT49S1600-20    No difference
520-HCU1600-S   559-FOXS160        No difference
                73-XT49S160-S      No difference
520-HCU1843-20  559-FOXS184-20     No difference
520-HCU1966-20  559-FOXS196-20     No difference
520-HCU2000-20  559-FOXS200-20     No difference
                73-XT49S2000-20    No difference
520-HCU2000-S   559-FOXS200        No difference
                73-XT49S2000-S     No difference
520-HCU2400-16  559-FOXS240F-20    Load cap. of 20pF
                                   instead of 16pF
                73-XT49S2400-20    Load cap. of 20pF
                                   instead of 16pF
520-HCU2400-20  559-FOXS240F-20    No difference
                73-XT49S2400-20    No difference
520-HCU2400-S   559-FOXS240F       No difference
                73-XT49S2400-S     NO difference



5-0101-22