EURO EUROQUARTZ HC49-4H and HC49-4HL Crystals Low-profile crystal units Low-cost, industry-standard crystal unit AT-Cut strip crystal with hermetically sealed can Frequency range 3.2MHz to 70MHz Package height options available OUTLINES & DIMENSIONS DESCRIPTION HC49-4H crystals have the same base outline as the industrystandard HC49 crystal. The crystal uses at AT-cut strip crystal with an hermetically sealed can. HC49-4H crystals provide a low cost source of system clock frequency. SPECIFICATION Frequency Range: Oscillation Mode/Frequency AT-Cut Fundamental: AT-Cut 3rd Overtone: BT-Cut Fundamental: Calibration Tolerance at 25ºC: 3.2MHz to 70.0MHz 3.2MHz to 48.0MHz 27.0MHz to 70.0MHz 24.0MHz to 48.0MHz ±5ppm, ±10ppm, ±20ppm or ±30ppm at 25°C Frequency Stability: Load Capacitance (CL): Ageing at 25°C: Series or from 8pF to 32pF ±3ppm maximum, 1st year, ±1ppm per year thereafter. 100mW typical, 500mW maximum -50° to +105°C Resistance-weld hermetic seal Compliant Bulk pack (Radial tape and reel is available) Drive Level: Storage Temperature Range: Crystal Holder: RoHS Status: Supply format: ESR and OSCILLATION MODE Frequency Range MHz 3.2 ~ 3.4 3.5 ~ 6.0 6.1 ~ 10.0 10.1 ~ 30.0 24.0 ~ 48.0 27.0 ~ 30.0 30.1 ~ 50.0 50.1 ~ 70.0 Crystal Cut Osc. Mode AT-Fund. AT-Fund. AT-Fund. AT-Fund. BT-Fund. AT-3rd ot AT-3rd ot AT-3rd ot ESR Ω Max. 300 120 60 40 40 150 100 80 PART NUMBERS Part numbers for HC49-4H crystals are generated as follows: Example: 8.000MHz HC49-4H/30/50/-20+70/30pF/30R Frequency FREQUENCY STABILITY vs OPERATING TEMPERATURE RANGE ±10 ±15 ±20 ±25 ±30 -10 to +60 Temp. °C/ppm ü ü ü ü ü -20 to +70 ASK ü ü ü ü -40 to +85 X ü ü ü ü Package HC49-4H HC49-4HL Calibration tolerance at 25°C (ppm) Stability over temp. (ppm) Operating temp. range (°C) Circuit Condition (SR = Series or 10~32pF) Max ESR (i.e. 30R = 30Ω max.) ( ) or 'ATF' or 'BTF' for AT or BT-cut fundamental, 3OT for 3rd overtone 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