EURO EUROQUARTZ HC49 Crystals General specification for HC49 family crystals Low-cost, industry-standard crystal unit Available to close tolerances Frequency range 1.0MHz to 250MHz Pakcage options DESCRIPTION HC49 crystals are long-established, industry-standard crystals. Standard HC49 crystals provide a very low cost source of system clock frequency and due to the dimensions of the crystal blank employed, vthey are also able to be produced to very close tolerances where required. Supply in several holder variants is available SPECIFICATION Frequency Range: Oscillation Mode: Calibration Tolerance at 25ºC: Frequency Stability: 1.0MHz to 250MHz See table from ±3ppm to ±50ppm from ±3ppm to ±50ppm Shunt Capacitance (C0): Load Capacitance (CL): 7pF maximum Series or from 8pF to 32pF ( ) ±3ppm maximum, 1st year, ±1ppm per year thereafter. 100mW typical, 500mW maximum Resistance-weld hermetic seal Bulk pack Ageing: Drive Level: Crystal Holder: Supply format: ESR and OSCILLATION MODE Frequency Range MHz Crystal Cut Osc. Mode 1.0 ~1.3 2.01 ~ 3.0 3.01 ~ 3.2 3.21 ~ 3.5 3.51 ~ 3.9 3.91 ~ 5.0 5.01 ~ 7.0 7.01 ~ 10.0 10.0 ~ 30.0 30.1 ~ 45.0 24.0 ~ 100 80.0 ~ 160 110 ~ 250 SL Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT Fund. AT 3rd OT AT 5th OT AT 7th OT ESR Ω Max. 5000 400 200 150 120 100 50 35 25 20 40 70 120 PART NUMBERS Part numbers for HC49 family crystals are generated as follows: Example: 16.000MHz HC49/30/50/-20+70/30pF/30R Frequency Package HC49, HC49T HC49/3W, HC49T/3W HC50 Calibration tolerance at 25°C (ppm) Max ESR (i.e. 30R = 30Ω max.) ( ) 'ATF' or 'BTF' for AT or BT-cut fundamental, 3OT for 3rd overtone Circuit Condition (SR = Series or 8pF ~ 32pF) Operating temp. range (°C) Stability over temp. (ppm) EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE Tel: +44 (0)1460 230000 Fax: +44 (0)1460 230001 [email protected] www.euroquartz.co.uk