Specification of Crystal Unit 1 NDK PART NUMBER NX2520SA 5 Type NX2520SA (STD-CSW-2) 6 6.1 6.2 6.3 6.4 6.5 6.6 Electrical characteristics Nominal frequency(F0) Overtone order Adjustment tolerance Tolerance over the temperature range Equivalent resistance (R1) Maximum Drive Level 7 7.2 7.1.1 7.1.2 7.1.3 7.2 7.2.1 7.2.2 7.2.3 Measurement circuit Frequency measurement Measuring instrument Load capacitance(CL) Level of drive Equivalent resistance measurement Measuring instrument Load capacitance(CL) Level of drive 8 Dimension ±10×10-6 max. (+25 °C) ±10×10-6 max. (-10~+60 °C) The reference temperature shall be +25 *ATTACHED SHEETS 5 100μW max. π circuit 10pF 10μW π circuit Series 10μW 0.1 0.65 Max 2.0 0.1 2.5 * ATTACHED SHEETS 5 Fundamental Cover Metal Base Alumina Ceramics (0.8) (0.8) #1 (0.65) #2 C 0.3 Terminal (0.65) Tungsten Metalize (Au plating on Ni pre plating) #3 #4 LAND PATTERN (TYPICAL) [TOP VIEW] PIN CONNECTION 1.0 1.3 1.7 #4 #3 #1 #2 TERMINAL #1,#3:X'tal #2,#4:GND(CONNECTION COVER) 1.2 13 Feb. 2009 Rev.B Frequency(MHz) 16 20 24 24.576 26 30 32 40 44 48 IC(ESR) 80 ohm 70 ohm 70 ohm 70 ohm 70 ohm 50 ohm 50 ohm 50 ohm 50 ohm 50 ohm