pca9574 NXP Semiconductors, pca9574 Datasheet - Page 27

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pca9574

Manufacturer Part Number
pca9574
Description
8-bit I2c-bus And Smbus, Level Translating, Low Voltage Gpio With Reset And Interrupt
Manufacturer
NXP Semiconductors
Datasheet

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NXP Semiconductors
22. Contents
1
2
3
4
4.1
5
6
6.1
6.2
7
7.1
7.2
7.3
7.4
7.5
7.5.1
7.5.2
7.5.3
7.5.4
7.5.5
7.5.6
7.5.7
7.5.8
7.6
7.7
7.8
7.9
7.10
8
8.1
8.1.1
8.2
8.3
9
10
11
12
13
14
15
16
17
17.1
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 5
Functional description . . . . . . . . . . . . . . . . . . . 6
Characteristics of the I
Bus transactions . . . . . . . . . . . . . . . . . . . . . . . 14
Application design-in information . . . . . . . . . 16
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 16
Static characteristics. . . . . . . . . . . . . . . . . . . . 17
Dynamic characteristics . . . . . . . . . . . . . . . . . 18
Test information . . . . . . . . . . . . . . . . . . . . . . . . 19
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 20
Handling information. . . . . . . . . . . . . . . . . . . . 22
Soldering of SMD packages . . . . . . . . . . . . . . 22
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 5
Device address . . . . . . . . . . . . . . . . . . . . . . . . . 6
Command register . . . . . . . . . . . . . . . . . . . . . . 6
Register definitions . . . . . . . . . . . . . . . . . . . . . . 7
Writing to port registers . . . . . . . . . . . . . . . . . . 7
Reading the port registers . . . . . . . . . . . . . . . . 7
Register 0 - Input port register . . . . . . . . . . . . . 7
Register 1 - Polarity inversion register . . . . . . . 8
Register 2 - Bus-hold/pull-up/pull-down
enable register . . . . . . . . . . . . . . . . . . . . . . . . . 8
Register 3 - Pull-up/pull-down selector
register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Register 4 - Configuration register . . . . . . . . . . 9
Register 5 - Output port register . . . . . . . . . . . . 9
Register 6 - Interrupt mask register . . . . . . . . 10
Register 7 - Interrupt status register . . . . . . . . 10
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 11
RESET input . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Software reset. . . . . . . . . . . . . . . . . . . . . . . . . 11
Interrupt output (INT) . . . . . . . . . . . . . . . . . . . 11
Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
START and STOP conditions . . . . . . . . . . . . . 12
System configuration . . . . . . . . . . . . . . . . . . . 13
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . 13
Introduction to soldering . . . . . . . . . . . . . . . . . 22
2
C-bus. . . . . . . . . . . . . 12
8-bit I
2
C-bus and SMBus, level translating, low voltage GPIO
17.2
17.3
17.4
18
19
20
20.1
20.2
20.3
20.4
21
22
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2008.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: salesaddresses@nxp.com
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 24
Revision history . . . . . . . . . . . . . . . . . . . . . . . 25
Legal information . . . . . . . . . . . . . . . . . . . . . . 26
Contact information . . . . . . . . . . . . . . . . . . . . 26
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Wave and reflow soldering . . . . . . . . . . . . . . . 22
Wave soldering. . . . . . . . . . . . . . . . . . . . . . . . 22
Reflow soldering. . . . . . . . . . . . . . . . . . . . . . . 23
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 26
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Disclaimers. . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Document identifier: PCA9574_1
PCA9574
Date of release: 15 May 2008
All rights reserved.

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