Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Number of I/O:	8
Interface:	I²C, SMBus
Interrupt Output:	Yes
Features:	POR
Output Type:	Push-Pull
Current - Output Source/Sink:	10mA, 25mA
Clock Frequency:	400kHz
Voltage - Supply:	2.3 V ~ 5.5 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP
Base Part Number:	PCA9554

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Introduction

The PCA9554PW is an 8-bit I/O expander designed for I2C-bus/SMBus applications. Used in conjunction with a microcontroller, it allows robust communication between two or more systems. This device is perfectly suited for low-pin count configurations as it provides 8 I/Os suitable for general purpose applications.

Features and Benefits

The PCA9554PW offers a variety of unique features, each with its own set of benefits:• 8-bit I/O expander• I2C-bus/SMBus Interface• 15-pin SOIC package• High system versatility• Low power consumption• Wide operating voltage (1.8-5.5V)• Low clock rate (100kHz)• Low-voltage detection (2.5V)• High/Low level voltage translation capabilities• Low stop-current• Wide industrial temperature range (-40°C to +85°C)

Application Fields

The PCA9554PW is suitable for a variety of applications such as:• Automotive• Industrial• Lighting• Medical• Security• Consumer productsIn these application fields, the PCA9554PW can be used to control user interfaces, drive external loads, read events from various sensors, or generate alarms.

Working Principle

The PCA9554PW is a CMOS based 8-bit I/O expander that allows bidirectional communication between two or more systems. It is a slave device capable of responding to commands sent by its master device.It is designed to operate using I2C-bus/SMBus protocol allowing easy communication with multiple slaves and providing features such as:• Data buffering• Automatic address recognition• In-system programming• Address and data transfer• High/low voltage translationThe PCA9554PW operates over a wide supply voltage range (1.8-5.5V) and can be connected to other I/Os present in system at different voltage levels using its internal high-low voltage translator. With a current consumption of less than 1µA in Standby mode, the PCA9554PW is suitable for low power applications.

Conclusion

The PCA9554PW is an ideal I/O expander for a variety of applications. With its small package size and low-power consumption, it is a great solution for designs that require minimal board space. With its wide operating voltage range and low-voltage detection, it is particularly well suited for automotive and industrial applications. Its integrated I2C-bus/SMBus interface allows for easy communication between two or more systems. In addition, its data buffering and automatic address recognition features, makes it simple and efficient to integrate into projects.

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