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PCA9675DB датащи(PDF) 34 Page - NXP Semiconductors |
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PCA9675DB датащи(HTML) 34 Page - NXP Semiconductors |
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34 / 34 page ![]() NXP Semiconductors PCA9675 Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt © NXP B.V. 2007. 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: 1 February 2007 Document identifier: PCA9675_1 Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’. 21. Contents 1 General description . . . . . . . . . . . . . . . . . . . . . . 1 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 5 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 6.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5 7 Functional description . . . . . . . . . . . . . . . . . . . 6 7.1 Device address . . . . . . . . . . . . . . . . . . . . . . . . . 6 7.1.1 Address maps. . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.2 Software Reset call, and Device ID addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.2.1 Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . 9 7.2.2 Device ID (PCA9675 ID field) . . . . . . . . . . . . . 10 8 I/O programming . . . . . . . . . . . . . . . . . . . . . . . 12 8.1 Quasi-bidirectional I/O architecture . . . . . . . . 12 8.2 Writing to the port (Output mode) . . . . . . . . . . 12 8.3 Reading from a port (Input mode) . . . . . . . . . 13 8.4 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 16 8.5 Interrupt output (INT) . . . . . . . . . . . . . . . . . . . 16 9 Characteristics of the I2C-bus. . . . . . . . . . . . . 17 9.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 9.1.1 START and STOP conditions . . . . . . . . . . . . . 17 9.2 System configuration . . . . . . . . . . . . . . . . . . . 17 9.3 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 18 10 Application design-in information . . . . . . . . . 19 10.1 Bidirectional I/O expander applications . . . . . 19 10.2 High current-drive load applications . . . . . . . . 19 10.3 Differences between the PCA9675 and the PCF8575. . . . . . . . . . . . . . . . . . . . . . . . . . 20 11 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 20 12 Static characteristics. . . . . . . . . . . . . . . . . . . . 21 13 Dynamic characteristics . . . . . . . . . . . . . . . . . 22 14 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 24 15 Handling information. . . . . . . . . . . . . . . . . . . . 30 16 Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 16.1 Introduction to soldering . . . . . . . . . . . . . . . . . 30 16.2 Wave and reflow soldering . . . . . . . . . . . . . . . 30 16.3 Wave soldering . . . . . . . . . . . . . . . . . . . . . . . . 30 16.4 Reflow soldering . . . . . . . . . . . . . . . . . . . . . . . 31 17 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 32 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 32 19 Legal information. . . . . . . . . . . . . . . . . . . . . . . 33 19.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 33 19.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 19.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 33 19.4 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 33 20 Contact information . . . . . . . . . . . . . . . . . . . . 33 21 Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 |
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