Crystal unit Product Number (please contact us) MC-306 : Q1xMC3062xxxx00 MC-405 : Q1xMC4052xxxx00 MC-406 : Q1xMC4062xxxx00 kHz RANGE CRYSTAL UNIT SMD MC - 306 MC - 405 / MC - 406 Frequency range Thickness Overtone order Applications : : 32.768 kHz (20 kHz to 120 kHz) 8.0 × 3.8 × 2.54 mm ···MC-306 10.41 × 4.06 × 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. 3 10-6 / year Max. 5 10-6 / 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) Frequency Motional resistance 31.2 kHzf_nom< 40 kHz 35 k Max. 40 kHzf_nom< 90 kHz 20 k Max. 90 kHzf_nom120 kHz 12 k Max. External dimensions (Unit:mm) Internal connection in MC-405 (TOP VIEW) MC-405 / 406 MC-306 3.2 #3 32.768 k E 6571A #4 #1 #2 #2 2.38 2.54 Max. 10.41 Max. 0.5 (0.9) 2.54 (0.9) 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 571 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: 5×××× 6×××× MC-405 MC-406 Footprint (Recommended) (Unit:mm) MC-405 0.8 4.1 1.9 1.52 MC-406 1.3 1.52 MC-306 4.1 1.9 . 20 kHzf_nom< 31.2 kHz 55 k Max. 1.3 4.2 1.3 4.1 3.9 4.1 3.9 4.1 PROMOTION OF ENVIRONMENTAL MANAGEMENT SYSTEM CONFORMING TO INTERNATIONAL STANDARDS At Seiko Epson, all environmental initiatives operate under the Plan-Do-Check-Action (PDCA) cycle designed to achieve continuous improvements. The environmental management system (EMS) operates under the ISO 14001 environmental management standard. All of our major manufacturing and non-manufacturing sites, in Japan and overseas, completed the acquisition of ISO 14001 certification. ISO 14000 is an international standard for environmental management that was established by the International Standards Organization in 1996 against the background of growing concern regarding global warming, destruction of the ozone layer, and global deforestation. WORKING FOR HIGH QUALITY In order provide high quality and reliable products and services than meet customer needs, Seiko Epson made early efforts towards obtaining ISO9000 series certification and has acquired ISO9001 for all business establishments in Japan and abroad. We have also acquired ISO/TS 16949 certification that is requested strongly by major automotive manufacturers as standard. ISO/TS16949 is the international standard that added the sector-specific supplemental requirements for automotive industry based on ISO9001. ►Explanation of the mark that are using it for the catalog ►Pb free. ►Complies with EU RoHS directive. *About the products without the Pb-free mark. Contains Pb in products exempted by EU RoHS directive. (Contains Pb in sealing glass, high melting temperature type solder or other.) ►The products have been designed for high reliability applications such as Automotive. Notice • • • • • • This material is subject to change without notice. Any part of this material may not be reproduced or duplicated in any form or any means without the written permission of Seiko Epson. The information about applied circuitry, software, usage, etc. written in this material is intended for reference only. Seiko Epson does not assume any liability for the occurrence of infringing on any patent or copyright of a third party. 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When using them in specific applications that require extremely high reliability, such as the applications stated below, you must obtain permission from Seiko Epson in advance. / Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related (automobiles, aircraft, trains, vessels, etc.) / Medical instruments to sustain life / Submarine transmitters / Power stations and related / Fire work equipment and security equipment / traffic control equipment / and others requiring equivalent reliability. • All brands or product names mentioned herein are trademarks and/or registered trademarks of their respective. Seiko Epson Corporation