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Name: PCA9544APWT
Brand: Texas Instruments
SKU: PCA9544APWT
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 PCA9544APWT

Part No.:: PCA9544APWT

Manufacturer:: Texas Instruments

Package:: 20-TSSOP (0.173, 4.40mm Width)

Datasheet:: PCA9544APWT.pdf

Description:: IC INTERFACE SPECIALIZED 20TSSOP

In Stock:: 32357

Quantity:: Add To Cart

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PCA9544APWT Specifications

Package/Case:
20-TSSOP (0.173, 4.40mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®,Bulk
Series:
-
ProductStatus:
Last Time Buy
Applications:
Translating Switch
Interface:
I²C, SMBus
Voltage-Supply:
2.3V ~ 5.5V

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PCA9544APWT information

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PCA9544APWT Typical application Circuitry

PCA9544APWT

The PCA9544APWT is a 4-channel I2C-bus and SMBus multiplexer with interrupt logic. This chip allows a single I2C master to interface with multiple I2C devices (slaves) that have the same address by providing channel selection through an I2C-bus interface.

PCA9544APWT Application Scenarios:

1. I2C Bus Expansion: Commonly used in complex systems requiring communication with multiple I2C devices having identical addresses, such as in embedded systems, multi-sensor platforms, or server motherboards.

2. Management of Multiple I2C Devices: Ideal for scenarios that require interfacing with multiple I2C devices like sensors or EEPROMs within a single system without address conflicts.

PCA9544APWT Key Features and Parameters:

1. 4-Channel Multiplexer: Offers four separate I2C-bus channels for effective device communication.

2. I2C-Bus Compatibility: Fully compatible with I2C-bus and SMBus standards, ensuring seamless system integration.

3. Interrupt Logic: Supports interrupt logic, allowing for efficient I2C-bus communication.

4. Wide Voltage Range: Operates typically within a 2.3V to 5.5V range, accommodating different logic levels.

5. Low Standby Current: Energy-efficient design with a low standby current.

Circuit Connection Example: Multi-Sensor I2C System

Overview: Implementing PCA9544APWT to interface multiple I2C sensors with the same address to a single I2C master.

1. Power Supply Connection: VCC (pin 16) should be connected to the system's power supply, typically within the 2.3V to 5.5V range.

2. Grounding the Multiplexer: GND (pin 8) needs to be connected to the system's ground.

3. I2C Master Connection: SDA (pin 15) and SCL (pin 14) are to be connected to the SDA and SCL lines of the I2C master.

4. Connecting I2C Sensors: SD0 to SD3 (pins 1-4) and SC0 to SC3 (pins 5-8) correspond to the SDA and SCL lines for each of the four sensor channels.

5. Channel Selection via Addressing: A0, A1, and A2 (pins 13, 12, and 11, respectively) are used for hardware addressing of the PCA9544APWT, determining which I2C channel is active.

6. Managing Sensor Interrupts: INT (pin 9) can be connected to an interrupt pin on the I2C master to manage interrupt signals from the sensors.

Design Considerations:

1. Voltage Level Compatibility: Ensure VCC matches the logic levels of the I2C master and connected sensors.

2. Channel Address Configuration: Set A0, A1, and A2 correctly to avoid address conflicts and ensure accurate channel selection.

3. I2C Bus Capacitance Management: Keep the total bus capacitance within the limits specified for I2C.

4. Effective Interrupt Handling: Utilize the INT pin effectively for efficient management of interrupts from the sensors.

5. Power Efficiency: Consider the low standby current for energy-efficient operation, especially in battery-powered systems.

In conclusion, the PCA9544APWT is an efficient solution for managing multiple I2C devices with identical addresses in a single system. Its 4-channel multiplexing capability, compatibility with I2C standards, and interrupt handling features make it a valuable component in complex I2C-bus systems, especially in multi-sensor applications.

PCA9544APWT FAQ

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6. What is the process for return or replacement of PCA9544APWT?

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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 PCA9544APWT.

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

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