PCA9555DWR

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PCA9555DWR

IC XPNDR 400KHZ I2C SMBUS 24SOIC

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規格

Part Status Active
DigiKey Programmable Not Verified
Number of I/O 16
Interface I2C, SMBus
Interrupt Output Yes
Features POR
Output Type 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 / Case 24-SOIC (0.295", 7.50mm Width)
Supplier Device Package 24-SOIC
Base Product Number PCA9555

概述

Description

The PCA9555DWR is an I²C-bus I/O port expander designed by NXP Semiconductors. It features 16 configurable GPIO pins, enabling the expansion of input/output capabilities for microcontrollers in various applications. The device can operate at supply voltages ranging from 2.3V to 5.5V and communicates over the I²C protocol, allowing for easy integration into existing systems.
Each GPIO pin can be individually configured as an input or output, and the device supports interrupt generation for input pins, facilitating efficient monitoring of external signals. The PCA9555DWR includes built-in pull-up resistors and can be daisy-chained with multiple devices on the same I²C bus, making it versatile for complex applications.
Applications include consumer electronics, industrial automation, automotive systems, and any project requiring additional I/O beyond the capabilities of the primary microcontroller. The PCA9555DWR is available in a compact 32-pin TQFP package, making it suitable for space-constrained designs.

Features

The PCA9555DWR is a 16-bit I/O port expander designed for communication with microcontrollers via I2C bus. Key features include:
1. 16 GPIO Pins: Configurable as input or output, allowing for flexible interfacing with various devices.
2. I2C Interface: Supports standard and fast modes, with a 100 kHz or 400 kHz data rate.
3. Addressing: Up to eight devices can be connected on the same bus, with configurable addresses using three address pins.
4. Interrupts: Provides interrupt functionality for monitoring input changes, enhancing responsiveness.
5. Power Supply Voltage Range: Operates typically between 1.8V to 5.5V, making it suitable for a wide variety of applications.
6. Low Power Consumption: Designed for low power usage, ideal for battery-operated devices.
7. Internal Pull-Up Resistors: Simplifies connections for input configurations.
8. Package: Available in a TSSOP 20-pin package, facilitating compact designs.
These features make the PCA9555DWR versatile for applications requiring additional I/O expansion.

Package

The PCA9555DWR is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) form factor.

Pinout

The PCA9555DWR is an I²C-bus I/O port expander with a pin count of 16. It features two 8-bit I/O ports, allowing for a total of 16 GPIO pins. The device can be configured for input or output on each pin.
Pin Functions:
- Ports: P0 to P7 (Port 0) and P8 to P15 (Port 1) serve as general-purpose I/O.
- VCC: Power supply pin.
- GND: Ground pin.
- SDA: Serial data line for I²C communication.
- SCL: Serial clock line for I²C communication.
- RESET: Active-low reset pin to reset the device.
- INT: Interrupt output pin, which signals the host when a change occurs on the I/O pins.
The PCA9555DWR provides flexibility in controlling multiple digital inputs and outputs with minimal microcontroller I/O usage, making it suitable for various applications in embedded systems.

Manufacturer

The PCA9555DWR is manufactured by NXP Semiconductors. NXP is a global semiconductor company that specializes in designing and manufacturing a wide range of electronic components and solutions, particularly for automotive, industrial, and Internet of Things (IoT) applications. The company is known for its expertise in mixed-signal and digital signal processing technologies, providing products that include microcontrollers, processors, and connectivity solutions. NXP was formed in 2006 as a spin-off from Philips, and it has since become a leader in the semiconductor industry, focusing on innovation and providing high-performance solutions to meet the evolving needs of various markets.

Application

The PCA9555DWR is a 16-bit I/O port expander used in various applications such as industrial automation, consumer electronics, and communication systems. It enables the expansion of GPIO for microcontrollers, facilitating tasks like switch detection, LED control, and sensor interfacing. Its I2C interface allows integration into complex systems, enhancing connectivity and flexibility in designs, particularly in embedded systems and robotics.

Equivalent

The PCA9555DWR chip is an I2C GPIO expander. Equivalent products include the MCP23017 from Microchip, which also provides I2C GPIO expansion with similar functionality, and the TCA9555 from Texas Instruments. Both alternatives offer multiple GPIO pins and I2C interface, suitable for similar applications. Always check specific datasheets for detailed features and compatibility.

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