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Name: PCA9535PWG4
Brand: Texas Instruments
SKU: PCA9535PWG4
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 PCA9535PWG4

Part No.:: PCA9535PWG4

Manufacturer:: Texas Instruments

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

Datasheet:: PCA9535PWG4.pdf

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

In Stock:: 3681

Quantity:: Add To Cart

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PCA9535PWG4 Specifications

Package/Case:
24-TSSOP (0.173, 4.40mm Width)
Packaging:
Tube
Series:
-
ProductStatus:
Discontinued at Mosen
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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PCA9535PWG4 information

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PCA9535PWG4 Typical application Circuitry

PCA9535PWG4

The PCA9535PWG4 is a 16-bit I2C-bus and SMBus I/O expander. It is designed to provide additional input/output (I/O) ports to a microcontroller or processor, which is particularly useful in systems with limited GPIO pins. This chip is commonly used to expand the I/O capabilities using the I2C bus for communication.

PCA9535PWG4 Application Scenarios:

1. I/O Expansion in Embedded Systems: Frequently employed in embedded systems like home automation devices, industrial controls, or IoT gadgets, where additional GPIOs are required for interfacing with various sensors, LEDs, or other peripherals.

2. Control Functions in Complex Electronics: Utilized in sophisticated electronic systems such as server motherboards and networking equipment for managing multiple control functions.

PCA9535PWG4 Key Features and Parameters:

1. 16-Bit I/O Ports: The PCA9535PWG4 provides sixteen additional I/O ports, each configurable as input or output.

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

3. Low Power Consumption: It is appropriate for battery-powered gadgets because it is energy-efficiently designed.

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

Circuit Connection Example: Expanding GPIO in an IoT Device

Overview: Using PCA9535PWG4 to extend the GPIO functionality of a microcontroller in an Internet of Things (IoT) device.

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

2. System Grounding: GND (pin 12) needs to be linked to the system's ground.

3. I2C Bus Connection: The microcontroller's I2C data and clock lines should be connected to pins 23 and 22, respectively, for SDA and SCL.

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 based on the specific needs of the IoT application.

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

Design Considerations:

1. Voltage Level Match: Ensure that VDD is compatible with the logic levels of the microcontroller.

2. Address Configuration on I2C Bus: Correctly configure A0, A1, and A2 to avoid address conflicts on the I2C bus.

3. Pull-Up Resistors on I2C Lines: Incorporate appropriate pull-up resistors on the SDA and SCL lines for stable communication.

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

5. Interrupt Feature Utilization: If the system requires, the interrupt feature can be used to enhance responsiveness to input changes.

In conclusion, the PCA9535PWG4 is a versatile and effective solution for expanding the GPIO capabilities of microcontroller systems, particularly beneficial in IoT applications and advanced electronic systems. Its 16-bit I/O expansion, low power consumption, and compatibility with I2C-bus standards make it a valuable component in various applications where additional GPIOs are necessary.

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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 PCA9535PWG4.

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