What is the Additional Feature ?

Name: PCA9557PW
Brand: Texas Instruments
SKU: PCA9557PW
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 PCA9557PW

Part No.:: PCA9557PW

Manufacturer:: Texas Instruments

Package:: 16-TSSOP (0.173, 4.40mm Width)

Datasheet:: PCA9557PW.pdf

Description:: IC I/O EXPANDER I2C 8B 16TSSOP

In Stock:: 1114

Quantity:: Add To Cart

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PCA9557PW Specifications

Package/Case:
16-TSSOP (0.173, 4.40mm Width)
Packaging:
Bulk,Tube
Series:
-
ProductStatus:
Active
NumberofI/O:
8
Interface:
I²C, SMBus
InterruptOutput:
No
Features:
POR
OutputType:
Open Drain, 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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PCA9557PW information

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PCA9557PW Typical application Circuitry

PCA9557PW

The PCA9557PW is an 8-bit I2C-bus and SMBus I/O expander. It is intended to give a microcontroller or CPU more input/output (I/O) ports, which is particularly helpful in systems with constrained I/O port availability.

Application Situations:

Embedded Systems: A popular method for increasing the I/O capabilities of microcontrollers in embedded systems.

2. Industrial Automation: Fit for managing actuators, sensors, and additional peripherals in industrial automation configurations.

Crucial attributes and parameters:

1. 8-Bit I/O Expansion: Provides 8 more I/O ports for a moderate expansion.

2. I2C/SMBus Interface: Ensures easy integration with I2C and SMBus communication protocols.

3. Configurable Port Direction: Allows each port to be set as input or output as needed.

4. Low Standby Current: Ideal for energy-sensitive applications.

5. Wide Voltage Compatibility: Operates over a broad range of system voltages.

Circuit Connection Example: Home Automation System

Overview: Implementing PCA9557PW in a home automation system for managing lighting and environmental sensors.

1. Power Supply Connection: VCC (pin 16) needs to be connected to the power supply of the home automation system in a way that complies with the voltage requirements of the PCA9557PW.

2. I2C Bus Integration: The SDA (pin 15) and SCL (pin 14) lines of the home automation system's I2C bus must be linked to their corresponding pins.

3. Device Interface through I/O Ports: I/O Ports (P0 to P7 on pins 1 to 7 and 9) for interfacing with lighting controls and environmental sensors. Configure each port based on the specific needs of the connected devices.

4. I2C Address Setting: Address Pins (A0, A1, and A2 on pins 10 to 12) are essential for determining the I2C address of PCA9557PW, ensuring correct device communication.

Design Considerations:

1. Voltage Level Matching: Ensure that VCC matches the power requirements of the connected home automation system and devices.

2. Accurate I2C Addressing: Configure the address pins correctly to prevent conflicts on the I2C bus.

3. Port Configuration: Appropriately set each port as input or output according to the connected devices' functions.

4. Integration and Testing: Ensure the PCA9557PW is seamlessly integrated into the home automation system, including thorough testing for functionality and connectivity.

In summary, the PCA9557PW is an effective solution for adding I/O ports to systems like home automation setups. Its 8-bit I/O expansion, I2C/SMBus compatibility, configurable ports, low power consumption, and wide voltage range make it suitable for such applications. Key aspects in circuit design include ensuring voltage compatibility, I2C addressing, port setup, and robust integration into the broader system.

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6. What is the process for return or replacement of PCA9557PW?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the PCA9557PW we delivered, we will accept the replacement or return of the PCA9557PW only when all of the below conditions are fulfilled:

(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 PCA9557PW.

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

Two processes to return the products:

(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations