Quartz Crystal Units 21SMX STANDARD SMD CRYSTALS Temperature stability (referred to +25゜ C) 0.00568 gm (wt.) 21SMX VCXO 0.7 0.65 Drive level (P) 0.5 0.55 #3 0.55 #1 SMI Part No. TCXO 0.75 1.35 26.000000 260 60 27.000000 270 60 27.120000 271 60 AT-Cut / Fundamental 10 seconds max. at +250゜ C ±10゜ C 1.05 AT-CUT +100 +80 +60 +40 Load capacitance (CL) Frequency designator Frequency 21M400-8 21 = 21SMX M = Parallel resonance CL= 8 pF 400 = 40.000 MHz 21S270 21 = 21SMX S = Series resonance 270 = 27.000 MHz Package Lid 21SMX Metal Base Ceramic Sealing Seam Terminal Tungsten (metalized) +20 Terminal plating 0 -20 -40 RoHS -60 -80 0 21 M 400 - 8 Circuit Calibration Condition Item (ppm) OCXO 80 +15 +30 +45 +60 28.636300 286 60 30.000000 300 60 32.000000 320 60 36.000000 360 60 38.400000 384 60 40.000000 400 50 42.000000 420 50 44.545000 44545 50 48.000000 480 50 PACKAGE DATA 0.85 -15 250 Package #2 SOLDERING PATTERN -30 25.000000 Example #3 -100 -45 80 100 μW max. (10 μW for testing) ±5 ppm max. at +25゜ C ±3゜ C per year Package type Circuit calibration condition <Top View> #4 #2 <#2 & #4 : Grounded to metal lid> ∆f/f 240 PART NUMBERING GUIDE 0.65 #4 24.000000 5 pF max. Reflow condition #2 #1 ±30 ppm over -20゜ C to +70゜ C Shunt capacitance (C0) 0.4±0.1 #1 200 8 pF, Typical Cut / Oscillation mode #3 1.6±0.1 #4 20.000000 Load capacitance (CL) Aging 2.0±0.1 20.000 MHz to 80.000 MHz ±30 ppm at +25゜ C ±3゜ C Max. Equivalent Series Resistance Ohms (Ω) ESR 100 +75 OCXO CLK OSC Actual size Frequency Designator CLK OSC Frequency tolerance Frequency MHz VCXO Frequency range Specifications 21SMX TCXO XTAL Item Package type XTAL 21SMX STANDARD FREQUENCIES STANDARD SPECIFICATIONS 21SMX Gold / Nickel (surface) / (under) Compliant (Pb-free) C) +90 (゜ MCF MCF TYPICAL TEMPERATURE CHARACTERISTICS TAPE SPECIFICATIONS ∅ 1.5 + 0 -0 .1 1.75±0.1 4.0±0.1 2.0±0.1 A C D L B J M F A B C D F J L M Reel Dia. Qty/Reel 2.25 1.85 8.0 3.5 4.0 1.05 0.25 0.65 180 3000pcs (1000pcs) 24 25