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PCA2002CX8/5/1 数据表(PDF) 25 Page - NXP Semiconductors |
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PCA2002CX8/5/1 数据表(HTML) 25 Page - NXP Semiconductors |
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25 / 25 page ![]() NXP Semiconductors PCA2002 32 kHz watch circuit programmable output period and pulse width © NXP B.V. 2008. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 11 November 2008 Document identifier: PCA2002_5 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 18. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6 Pinning information . . . . . . . . . . . . . . . . . . . . . . 3 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 Functional description . . . . . . . . . . . . . . . . . . . 4 7.1 Motor pulse . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 Time calibration . . . . . . . . . . . . . . . . . . . . . . . . 4 7.3 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.4 Programming possibilities. . . . . . . . . . . . . . . . . 5 7.5 Type recognition . . . . . . . . . . . . . . . . . . . . . . . . 6 7.6 Programming procedure . . . . . . . . . . . . . . . . . . 7 7.7 Programming the memory cells . . . . . . . . . . . . 8 7.8 Checking the memory content . . . . . . . . . . . . . 9 7.9 Frequency tuning at assembled watch . . . . . . 10 7.10 Measurement of the oscillator frequency and the inhibition time. . . . . . . . . . . . . . . . . . . 10 8 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12 9 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13 10 OTP programming characteristics . . . . . . . . . 14 11 Bare die outline . . . . . . . . . . . . . . . . . . . . . . . . 15 12 Packing information. . . . . . . . . . . . . . . . . . . . . 17 12.1 Tray information . . . . . . . . . . . . . . . . . . . . . . . 17 12.2 Unsawn wafer information . . . . . . . . . . . . . . . 19 13 Soldering of WLCSP packages. . . . . . . . . . . . 20 13.1 Introduction to soldering WLCSP packages . . 20 13.2 Board mounting . . . . . . . . . . . . . . . . . . . . . . . 20 13.3 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 20 13.3.1 Stand off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 13.3.2 Quality of solder joint . . . . . . . . . . . . . . . . . . . 21 13.3.3 Rework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 13.3.4 Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 14 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 22 15 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 23 16 Legal information. . . . . . . . . . . . . . . . . . . . . . . 24 16.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 24 16.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 16.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 16.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 17 Contact information. . . . . . . . . . . . . . . . . . . . . 24 18 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 |
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