NXP Semiconductors
PCA9544A
4-channel I
2
C-bus multiplexer with interrupt logic
© NXP Semiconductors N.V. 2014. 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: 23 April 2014
Document identifier: PCA9544A
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
20. Contents
1 General description. . . . . . . . . . . . . . . . . . . . . . 1
2 Features and benefits . . . . . . . . . . . . . . . . . . . . 1
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
3.1 Ordering options. . . . . . . . . . . . . . . . . . . . . . . . 2
4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Pinning information. . . . . . . . . . . . . . . . . . . . . . 4
5.1 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
6 Functional description . . . . . . . . . . . . . . . . . . . 6
6.1 Device addressing . . . . . . . . . . . . . . . . . . . . . . 6
6.2 Control register. . . . . . . . . . . . . . . . . . . . . . . . . 6
6.2.1 Control register definition . . . . . . . . . . . . . . . . . 6
6.3 Interrupt handling . . . . . . . . . . . . . . . . . . . . . . . 7
6.4 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.5 Voltage translation . . . . . . . . . . . . . . . . . . . . . . 8
7 Characteristics of the I
2
C-bus . . . . . . . . . . . . . 9
7.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7.2 START and STOP conditions . . . . . . . . . . . . . . 9
7.3 System configuration . . . . . . . . . . . . . . . . . . . . 9
7.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.5 Bus transactions. . . . . . . . . . . . . . . . . . . . . . . 11
8 Application design-in information . . . . . . . . . 12
9 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 13
10 Thermal characteristics . . . . . . . . . . . . . . . . . 13
11 Static characteristics. . . . . . . . . . . . . . . . . . . . 14
12 Dynamic characteristics . . . . . . . . . . . . . . . . . 16
13 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 18
14 Soldering of SMD packages . . . . . . . . . . . . . . 21
14.1 Introduction to soldering . . . . . . . . . . . . . . . . . 21
14.2 Wave and reflow soldering . . . . . . . . . . . . . . . 21
14.3 Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 21
14.4 Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 22
15 Soldering: PCB footprints. . . . . . . . . . . . . . . . 24
16 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 27
17 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 28
18 Legal information. . . . . . . . . . . . . . . . . . . . . . . 29
18.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 29
18.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
18.3 Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 29
18.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
19 Contact information. . . . . . . . . . . . . . . . . . . . . 30
20 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

PCA9544AD,112

Mfr. #:
Manufacturer:
NXP Semiconductors
Description:
Multiplexer Switch ICs 4-CH I2C MUX
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union