
NXP Semiconductors
PCA9674; PCA9674A
Remote 8-bit I/O expander for Fm+ I
2
C-bus with interrupt
NXP B.V. 2011.
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: 29 September 2011
Document identifier: PCA9674_PCA9674A
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
2
3
4
5
6
6.1
6.2
7
7.1
7.1.1
7.2
General description. . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information. . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 6
Device address. . . . . . . . . . . . . . . . . . . . . . . . . 6
Address maps. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Software Reset Call, and device ID
addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Software Reset. . . . . . . . . . . . . . . . . . . . . . . . 11
Device ID (PCA9674; PCA9674A ID field) . . . 12
I/O programming . . . . . . . . . . . . . . . . . . . . . . . 13
Quasi-bidirectional I/O architecture . . . . . . . . 13
Writing to the port (Output mode). . . . . . . . . . 13
Reading from a port (Input mode) . . . . . . . . . 14
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 15
Interrupt output (INT) . . . . . . . . . . . . . . . . . . . 15
Characteristics of the I
2
C-bus . . . . . . . . . . . . 16
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
START and STOP conditions . . . . . . . . . . . . . 16
System configuration . . . . . . . . . . . . . . . . . . . 16
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 17
Application design-in information . . . . . . . . . 18
Bidirectional I/O expander applications . . . . . 18
High current-drive load applications . . . . . . . . 18
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 19
Static characteristics. . . . . . . . . . . . . . . . . . . . 20
Dynamic characteristics . . . . . . . . . . . . . . . . . 21
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 23
Handling information. . . . . . . . . . . . . . . . . . . . 26
Soldering of SMD packages . . . . . . . . . . . . . . 26
Introduction to soldering . . . . . . . . . . . . . . . . . 26
Wave and reflow soldering . . . . . . . . . . . . . . . 26
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 26
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 27
Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 28
Revision history. . . . . . . . . . . . . . . . . . . . . . . . 29
Legal information. . . . . . . . . . . . . . . . . . . . . . . 30
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 30
Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
7.2.1
7.2.2
8
8.1
8.2
8.3
8.4
8.5
9
9.1
9.1.1
9.2
9.3
10
10.1
10.2
11
12
13
14
15
16
16.1
16.2
16.3
16.4
17
18
19
19.1
19.2
19.3
19.4
20
21
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Contact information . . . . . . . . . . . . . . . . . . . . 31
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32