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PCA9557PW

Name: PCA9557PW
Rating: 4.7 (12 reviews)

IC XPND 400KHZ I2C SMBUS 16TSSOP

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仕様

Part Status	Obsolete
Base Product Number	PCA9557
DigiKey Programmable	Not Verified
Number of I/O	8
Interface	I2C, SMBus
Interrupt Output	No
Features	POR
Output Type	Open Drain, Push-Pull
Current - Output Source/Sink	10mA, 25mA
Clock Frequency	400 kHz
Voltage - Supply	2.3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package	16-TSSOP
Packaging	Tube

概要

Description

The PCA9557PW is a dual I²C-bus I/O port expander from NXP Semiconductors, designed to increase the number of I/O pins available for microcontrollers or processors. It features 16 GPIO pins that can be configured as inputs or outputs, allowing for flexible interfacing with various devices. The PCA9557 operates with a supply voltage range of 1.8V to 5.5V and communicates over the I²C protocol, making it compatible with a wide range of systems.
Key features include:
- 16 programmable I/O pins
- Interrupt capabilities for input changes
- Configurable pull-up resistors
- Multiple device addressing, allowing for connection of up to eight devices on the same I²C bus
- Low-power consumption and high-speed operation
This makes the PCA9557PW ideal for applications in consumer electronics, industrial automation, and other embedded systems where additional I/O is required without increasing the complexity of the microcontroller design.

Features

The PCA9557PW is a dual I2C-bus I/O port expander designed for microcontroller applications. Key features include:
1. I2C Interface: Supports standard I2C communication with a 2-wire interface, allowing easy integration with microcontrollers.
2. 16 I/O Ports: Provides 16 programmable I/O ports, configurable as either inputs or outputs, to expand GPIO capabilities.
3. Interrupt Capability: Features an interrupt output pin that signals when an input state changes, improving efficiency in monitoring.
4. Voltage Range: Operates within a wide power supply range of 1.8V to 5.5V, making it suitable for various applications.
5. Pull-up Resistors: Integrated pull-up resistors for inputs simplify circuit design.
6. Low Power Consumption: Designed for low power operation, making it ideal for battery-powered applications.
7. Multiple Devices: Supports multiple PCA9557 devices on the same I2C bus, allowing for scalability.
These features make the PCA9557PW a versatile solution for expanding I/O capabilities in embedded systems.

Package

The PCA9557PW is housed in a TSSOP-16 package, which is a thin, surface-mount package with 16 pins. This package type is designed for compact applications and provides a low profile, making it suitable for space-constrained electronic designs.

Pinout

The PCA9557PW is a I2C-bus I/O port with interrupt capability, featuring a 16-pin package. It provides 8 bits of input/output (I/O) control.
### Pin Count:
- Total Pins: 16
### Pin Functions:
1. VDD (Pin 1): Power supply.
2. GND (Pin 8): Ground reference.
3. SDA (Pin 2): Serial data line for I2C communication.
4. SCL (Pin 3): Serial clock line for I2C communication.
5. INT (Pin 4): Interrupt output.
6. AIN0 - AIN7 (Pins 5-12): Input pins for external connections, can be configured as outputs.
7. RESET (Pin 13): Active-low reset input.
8. P0 - P7 (Pins 14-16): Additional I/O port functionality.
The PCA9557PW allows for flexible configuration of I/O pins for various applications, making it useful in embedded systems needing GPIO expansion.

Manufacturer

The PCA9557PW is manufactured by NXP Semiconductors, a global semiconductor company based in the Netherlands. NXP specializes in designing and manufacturing a wide range of integrated circuits and semiconductor solutions, focusing on automotive, industrial, IoT, and mobile applications. The PCA9557PW is a dual I2C-bus I/O port expander that allows for the expansion of GPIO pins in various electronic systems, facilitating increased connectivity and functionality in embedded designs. NXP is known for its commitment to innovation in connectivity and security technologies, making it a key player in the semiconductor industry.

Application

The PCA9557PW is a dual I2C-bus I/O port expander with interrupt capability. It is commonly used in applications such as microcontroller expansion, keypads, LED control, and sensor interfacing. It enhances GPIO capabilities in embedded systems, enabling more complex user interfaces and peripheral connections while conserving microcontroller I/O pins. Typical areas include consumer electronics, automotive systems, and industrial automation.

Equivalent

The PCA9557PW is an I2C I/O port expander. Equivalent products include:
1. MCP23017 - 16-bit I/O expander from Microchip.
2. PCF8574 - 8-bit I/O expander from NXP.
3. TCA9534 - 16-bit I/O expander from Texas Instruments.
4. MCP23008 - 8-bit I/O expander from Microchip.
These alternatives may vary in features like I2C address, number of ports, and voltage levels. Always check specific datasheets for compatibility.