Crystal unit Epson Toyocom Product Number (please contact us) MC-306 : Q13MC3061xxxx00 MC-405 : Q1xMC4051xxxx00 MC-406 : Q1xMC4061xxxx00 kHz RANGE CRYSTAL UNIT SMD MC - 306 MC - 405 / MC - 406 •Frequency range •Thickness : : •Overtone order •Applications : : 32.768 kHz (20 kHz to 165 kHz) 8.0 × 3.8 × 2.54 t (mm) ···MC-306 10.41 × 4.06 × 3.6 t (mm) ···MC-405 / 406 Fundamental /Overtone (307.2 kHz) Clock and Microcomputer Actual size MC-306 MC-405 / 406 Specifications (characteristics) Item Symbol Nominal frequency range f_nom Temperature Storage temperature range Operating temperature Level of drive Frequency tolerance (standard) Turnover temperature Parabolic coefficient Load capacitance Motional resistance (ESR) T_stg T_use DL f_tol Ti B CL R1 Motional capacitance C1 Shunt capacitance C0 Frequency aging f_age Specifications 20 kHz to 165 kHz 307.2 kHz(MC-405 / 406) -55 °C to +125 °C -40 °C to +85 °C 1.0 μW Max. ±20 × 10-6, ±50 × 10-6 ±50 × 10-6, ±100 × 10-6 +25 °C ±5 °C -0.04 × 10-6 / °C2 Max. 6 pF to ∞ (standard :12.5 pF) 50 kΩ Max. 55 kΩ to 6 kΩ 1.8 fF Typ. 4.0 fF to 0.6 fF 2.0 fF Typ. 0.9 pF Typ. 2.0 pF to 0.6 pF 0.85 pF Typ. ±3 × 10-6 / year Max. ±5 × 10-6 / year Max. 32.768 kHz Remarks Please contact us regarding available frequencies Store as bare product after unpacking +25 °C, DL=0.1 μW Please specify As per below table MC-306 MC-405 / 406 MC-306 MC-405 / 406 +25 °C, First year Motional resistance (ESR) Frequency 20 kHz≤f_nom< 31.2 kHz 31.2 kHz≤f_nom< 40 kHz 40 kHz≤f_nom< 90 kHz 90 kHz≤f_nom< 130 kHz 130 kHz≤f_nom≤165 kHz Motional resistance 55 kΩ Max. 35 kΩ Max. 20 kΩ Max. 12 kΩ Max. 10 kΩ Max. External dimensions (Unit:mm) Internal connection in MC-405 (TOP VIEW) MC-405 / 406 MC-306 8.0 Max. #4 #3 #1 #2 #3 32.768 k E 6571A #4 #1 #2 Internal connection in MC-406 (TOP VIEW) #3 #4 9.60 #1 10.41 Max. #2 3.15 2.54 Max. 2.38 #1 0.5 (0.9) 2.54 (0.9) Do not connect #2 and #3 to external device. Metal may be exposed on the top or bottom of this product. This will not affect any quality, reliability or electrical spec. 2.54 0.51 0.2 Min. 1.9 5.5 #2 3.6 Max. #2 #1 Internal connection (TOP VIEW) #3 #4 4.06 Max. 3.2 32.768 k 571 E 3.8 Max. #3 #4 0.51 2.29 Do not connect #2 and #3 of MC-406 to external device. The first digit of No. means: 5×××× 6×××× MC-405 MC-406 Footprint (Recommended) (Unit:mm) MC-406 0.8 4.1 1.9 1.52 MC-405 1.3 1.52 MC-306 4.1 1.9 . 1.3 4.2 307.2 kHz 6 kΩ Max. 4.1 3.9 4.1 1.3 http://www.epsontoyocom.co.jp 3.9 4.1