What is the Additional Feature ?

Name: PCA9539PW
Brand: Texas Instruments
SKU: PCA9539PW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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Texas Instruments PCA9539PW

Part No.:: PCA9539PW

Manufacturer:: Texas Instruments

Package:: 24-TSSOP (0.173, 4.40mm Width)

Datasheet:: PCA9539PW.pdf

Description:: IC I/O EXPANDER I2C 16B 24TSSOP

In Stock:: 2466

Quantity:: Add To Cart

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PCA9539PW Specifications

Package/Case:
24-TSSOP (0.173, 4.40mm Width)
Packaging:
Bulk,Tube
Series:
-
ProductStatus:
Obsolete
NumberofI/O:
16
Interface:
I²C, SMBus
InterruptOutput:
Yes
Features:
POR
OutputType:
Push-Pull
Current-OutputSource/Sink:
10mA, 25mA
ClockFrequency:
400 kHz
Voltage-Supply:
2.3V ~ 5.5V
OperatingTemperature:
-40°C ~ 85°C
MountingType:
Surface Mount

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PCA9539PW information

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PCA9539PW Typical application Circuitry

PCA9539PW

The PCA9539PW is a 16-bit I2C-bus and SMBus low-power I/O expander. It is specifically designed to provide additional input/output (I/O) ports to a microcontroller or processor in systems where the number of available GPIO pins is limited. The chip is widely used to expand the I/O capabilities via the I2C bus for communication.

PCA9539PW Application Scenarios:

1. I/O Expansion in Embedded Systems: Commonly used in embedded systems such as in home automation, industrial automation, or Internet of Things (IoT) devices, where more GPIOs are required for interfacing with sensors, LEDs, or other peripherals.

2. Control Functions in Consumer Electronics: Employed in consumer electronics like smartphones, tablets, and PCs to manage various control functionalities.

PCA9539PW Key Features and Parameters:

1. 16-Bit I/O Expansion: Offers sixteen additional I/O ports, each configurable as input or output.

2. I2C-Bus Interface: Compatible with the I2C-bus and SMBus, facilitating easy integration into most microcontroller-based systems.

3. Low Power Consumption: Designed for energy efficiency, suitable for battery-powered devices.

4. Programmable Polarity Inversion: Includes programmable polarity inversion for input ports.

5. Operating Voltage Range: Typically operates within a 2.3V to 5.5V range, accommodating various logic levels.

Circuit Connection Example: Expanding GPIOs in an IoT Device

Overview: Using PCA9539PW to increase the number of GPIOs available for a microcontroller in an Internet of Things (IoT) device.

1. Power Supply Connection: VDD (pin 24) should be linked to the microcontroller's power supply, typically within the 2.3V to 5.5V range.

2. Ground Connection: GND (pin 12) needs to be connected to the system's ground.

3. I2C Bus Integration: SDA (pin 23) and SCL (pin 22) are to be connected to the I2C data and clock lines of the microcontroller.

4. Configuring I/O Ports: P0.0 to P0.7 (pins 1-7) and P1.0 to P1.7 (pins 13-20) serve as the I/O ports, programmable as inputs or outputs as required.

5. I2C Address Setting: A0, A1, and A2 (pins 21, 20, and 19, respectively) must be set to define the I2C address of the device, connecting them to either VCC or GND.

Design Considerations:

1. Voltage Level Compatibility: Ensure that VDD matches the logic level voltage of the microcontroller.

2. I2C Address Configuration: Appropriately set A0, A1, and A2 to prevent conflicts on the I2C bus.

3. Pull-Up Resistors on I2C Lines: Include suitable pull-up resistors on the SDA and SCL lines to ensure stable I2C communication.

4. Input/Output Port Configuration: Properly set up P0.0 to P1.7 as inputs or outputs based on the specific IoT application requirements.

5. Power Consumption Management: Be mindful of the low power consumption feature, particularly in battery-powered applications.

In conclusion, the PCA9539PW is an effective solution for expanding the GPIO capabilities of microcontroller systems, particularly beneficial in IoT applications and complex electronics. Its 16-bit I/O expansion, compatibility with I2C-bus standards, and energy-efficient design make it a valuable component in various applications where additional GPIOs are needed.

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6. What is the process for return or replacement of PCA9539PW?

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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of PCA9539PW.

(3)The PartNo is unused and only in the original unpacked packaging.

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