PCA9535PW

Series:	--
Packaging:	Tube
Lead Free Status / RoHS Status:	--
Part Status:	Not For New Designs
Moisture Sensitivity Level (MSL):	--
Number of I/O:	16
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:	24-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	24-TSSOP
Base Part Number:	PCA9535

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Introduction to PCA9535PW

The PCA9535PW is an I/O expander from Texas Instruments. It is an 8-bit, I2C two-line buffered and latched inputs-outputs interface with built-in logic that simplifies electronic system application and adds flexibility to system designs. It can be used to provide user interfaces to systems or to expand the number of I/O lines available on the existing processor.

Application field and working principle of PCA9535PW

The PCA9535PW is used in a variety of applications such as control and monitoring, interfacing to sensors and actuators, and general-purpose input/output (GPIO) expansion. It is useful in applications that require a high number of I/O lines in a small package and with minimal power consumption. It also features an interrupt logic, which can be used for critical event notification, such as when a sensor has tripped or when a critical temperature has been reached. The PCA9535PW has two primary parts—the I2C interface and the I/O. The I2C interface is used to read and write data to the I/O lines, as well as to control the interrupt logic. The I/O lines are 8 bit wide and can be configured as either input or output lines. When configured as an output, the level of the output can be either high or low. The input lines can be used to sense the level of a signal or to detect the presence of a switch or sensor. The PCA9535PW features an interrupt logic which can be used to alert the system when a particular event has been detected. This can be useful in applications that require immediate notification when a critical event has occurred. When an interrupt is generated, the system will be alerted and the system can then take action. The PCA9535PW is powered by either a 2.5V or 3.3V supply. It can operate over a temperature range of -40°C to +85°C and it features low current consumption (less than 200μA).

Conclusion

The PCA9535PW is a versatile and powerful I/O expander that can be used to add individual I/O lines to a system. It has an I2C interface for communication and control and an interrupt logic for critical event notification. It is small in size and requires only a low voltage for operation. The PCA9535PW is an ideal choice for applications that require a large number of inputs and/or outputs in a small package with minimal power consumption.

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