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Name: PCA9539PWR
Brand: Texas Instruments
SKU: PCA9539PWR
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 PCA9539PWR

Part No.:: PCA9539PWR

Manufacturer:: Texas Instruments

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

Datasheet:: PCA9539PWR.pdf

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

In Stock:: 2396

Quantity:: Add To Cart

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PCA9539PWR Specifications

Package/Case:
24-TSSOP (0.173, 4.40mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Not For New Designs
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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PCA9539PWR information

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PCA9539PWR Typical application Circuitry

PCA9539PWR

The PCA9539PWR is a 16-bit I2C-bus and SMBus low-power I/O expander. This chip is designed to extend the input/output (I/O) capabilities of a microcontroller or processor, particularly in systems with limited GPIO pins.

PCA9539PWR Application Scenarios:

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

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

PCA9539PWR Key Features and Parameters:

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

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

3. Low Power Consumption: Suitable for energy-efficient and battery-powered devices.

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

5. Wide 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: Utilizing PCA9539PWR to increase the number of GPIOs available for a microcontroller in an IoT device.

1. Power Supply Integration:

- VDD (pin 24) should be connected to the microcontroller's power supply, typically within the 2.3V to 5.5V range.

2. Grounding the Device:

- GND (pin 12) needs to be connected to the system's ground.

3. I2C Bus Connectivity:

- SDA (pin 23) and SCL (pin 22) should be linked 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, configurable as inputs or outputs as required by the application.

5. I2C Address Setting:

- A0, A1, and A2 (pins 21, 20, and 19, respectively) must be set to establish the I2C address of the device, by connecting them to either VCC or GND.

Design Considerations:

1. Voltage Level Compatibility: Ensure VDD matches the microcontroller's logic level voltage.

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

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

4. Input/Output Port Configuration: Properly configure P0.0 to P1.7 as inputs or outputs, based on the specific needs of the IoT device.

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

In summary, the PCA9539PWR is an effective solution for expanding the GPIO capabilities of microcontroller systems, especially 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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(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

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