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PCA9557 Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Reset and Configuration Registers
SCPS133K
December 2005 – December 2024
PCA9557
PRODUCTION DATA
CONTENTS
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PCA9557 Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Reset and Configuration Registers
1
1
Features
2
Applications
3
Description
4
Pin Configuration and Functions
5
Specifications
5.1
Absolute Maximum Ratings
5.2
ESD Ratings
5.3
Recommended Operating Conditions
5.4
Thermal Information
5.5
Electrical Characteristics
5.6
I2C Interface Timing Requirements
5.7
Reset Timing Requirements
5.8
Switching Characteristics
5.9
Typical Characteristics
6
Parameter Measurement Information
7
Detailed Description
7.1
Functional Block Diagram
7.2
Feature Description
7.2.1
RESET
7.2.1.1
RESET Errata
7.2.1.1.1
System Impact
7.2.1.1.2
System Workaround
7.2.2
Power-On Reset
7.3
Programming
7.3.1
I2C Interface
7.4
Register Maps
7.4.1
Device Address
7.4.2
Control Register And Command Byte
7.4.3
Register Descriptions
7.4.3.1
Bus Transactions
7.4.3.1.1
Writes
7.4.3.1.2
Reads
8
Application and Implementation
8.1
Application Information
8.2
Typical Application
8.2.1
Detailed Design Procedure
8.2.1.1
Minimizing ICC when I/O is Used to Control LED
8.3
Power Supply Recommendations
8.3.1
Power-On Reset Errata
8.3.1.1
System Impact
9
Device and Documentation Support
9.1
Documentation Support
9.1.1
Related Documentation
9.2
Receiving Notification of Documentation Updates
9.3
Support Resources
9.4
Trademarks
9.5
Electrostatic Discharge Caution
9.6
Glossary
10
Revision History
11
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DGV|16
MPDS006C
PW|16
MPDS361A
DB|16
MPDS507A
RGY|16
MPQF115G
D|16
MPDS178G
RGV|16
MPQF121F
Thermal pad, mechanical data (Package|Pins)
RGY|16
QFND040P
RGV|16
QFND107G
Orderable Information
scps133k_oa
scps133k_pm
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Data Sheet
PCA9557
Remote 8-Bit I
2
C and SMBus Low-Power I/O Expander With Reset and Configuration Registers