Crystal unit Product Number (please contact us) MC-306 : Q1xMC3062xxxx00 MC-405 : Q1xMC4052xxxx00 MC-406 : Q1xMC4062xxxx00 kHz RANGE CRYSTAL UNIT MC - 306 MC - 405 / MC - 406 Frequency range Thickness Overtone order Applications : : 32.768 kHz (20 kHz to 120 kHz) 8.0 x 3.8 x 2.54 mm ***MC-306 10.41 x 4.06 x 3.6 mm ***MC-405 / 406 : Fundamental : Clock and Microcomputer Actual size MC-306 MC-405 / 406 Specifications (characteristics) Item Nominal frequency range Storage temperature Operating temperature Level of drive Frequency tolerance (standard) Turnover temperature Parabolic coefficient Load capacitance Motional resistance (ESR) Symbol f_nom 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 120 kHz -55 C to +125 C -40 C to +85 C 1.0 W 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 k Max. As per table below 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. -6 -6 3 10 / year Max. 5 10 / year Max. 32.768 kHz Conditions / Remarks Please contact us about available frequencies. Storage as single product. +25 C, DL=0.1 W Please specify MC-306 MC-405 / 406 MC-306 MC-405 / 406 +25 C, First year Motional resistance (ESR) 20 kHzf_nom< 31.2 kHz 55 k Max. Product name (Standard form) MC-306 32.768000kHz 12.5 +20.0-20.0 Model Frequency Load capacitance(pF) 31.2 kHzf_nom< 40 kHz 35 k Max. 40 kHzf_nom< 90 kHz 20 k Max. 90 kHzf_nom120 kHz 12 k Max. -6 Frequency tolerance(x 10 , +25 C) External dimensions (Unit:mm) Internal connection in MC-405 (TOP VIEW) MC-405 / 406 MC-306 3.2 #3 32.768 k #4 E 6571A #1 #2 10.41 Max. 2.38 2.54 Max. #2 0.5 (0.9) (0.9) 2.54 Do not connect #2 and #3 to external device. The metal case inside of the molding compound may be exposed on the top or bottom of this product. This purely cosmetic and does not have any effect on quality, reliability or electrical specs. 2.54 #2 #4 #3 #1 #2 0.51 0.2 Min. 1.9 5.5 #3 #1 3.6 Max. #1 #4 Internal connection in MC-406 (TOP VIEW) 9.60 #2 #1 Internal connection (TOP VIEW) #3 #4 3.15 32.768 k E 5 71 3.8 Max. #3 #4 4.06 Max. 8.0 Max. 0.51 2.29 Do not connect #2 and #3 of MC-406 to external device. The first digit of No. means: 5xxxx 6xxxx 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 . Frequency Motional resistance 1.3 4.2 1.3 4.1 3.9 4.1 3.9 4.1 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Epson: MC-306 32.7680K-A:ROHS MC-306 32.7680K-A0: PURE SN MC-306 32.7680K-A3:ROHS MC-306 32.7680K-AC3: ROHS MC-306 32.7680K-AE0: ROHS MC-306 32.7680K-E0: PURE SN MC-306 32.7680K-E0:ROHS MC-306 32.7680K-E3: PURE SN MC-306 32.7680K-E3:ROHS MC-306 32.7680K-A0:ROHS MC-306 32.768K-E3:ROHS