NCA9555

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NCA9555

16-BIT I2C-BUS I/O PORT

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Thông số kỹ thuật

Part Status Active
Number of I/O 16
Interface I2C, SMBus
Interrupt Output Yes
Output Type Open Drain
Current - Output Source/Sink 10mA
Clock Frequency 400 kHz
Voltage - Supply 2.3V ~ 5.5V
Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount
Package / Case 24-TSSOP (0.307", 4.40mm Width)
Supplier Device Package 24-TSSOP

Tổng quan

Description

The NCA9555 is a 16-channel I/O port expander designed for interfacing with microcontrollers via an I2C bus. It allows for the expansion of GPIO (General Purpose Input/Output) pins, enabling a microcontroller to control multiple devices or read multiple inputs without requiring additional pins. The device supports both input and output configurations, making it versatile for various applications such as LED control, sensor reading, and more.
Key features include programmable pull-up resistors, interrupt generation for input changes, and the ability to address multiple NCA9555 devices on the same I2C bus. The device operates typically at a supply voltage of 1.8V to 5.5V, making it compatible with a wide range of microcontrollers. Its compact design and efficient functionality make it suitable for embedded systems, consumer electronics, and automation projects where additional I/O capability is needed. Overall, the NCA9555 provides a convenient solution for expanding I/O in resource-constrained environments.

Features

The NCA9555 is a 16-channel I/O expander designed for use with microcontrollers and microprocessors via the I2C bus. Key features include:
1. I/O Ports: 16 general-purpose I/O pins configurable as inputs or outputs.
2. I2C Interface: Supports standard and fast-mode I2C communication (up to 400 kHz).
3. Addressing: Configurable I2C addresses (up to 4 devices on the same bus).
4. Interrupt Capability: Provides an interrupt output pin to notify the host controller of any changes on the input pins.
5. Pull-Up Resistors: Internal pull-up resistors that can be enabled for input pins.
6. Power Supply Range: Operates from 1.8V to 5.5V, making it suitable for various applications.
7. LED Control: Supports LED driving applications with multiple outputs.
8. Low Power Consumption: Designed for low energy usage, enhancing battery-operated device longevity.
These features make the NCA9555 ideal for applications in consumer electronics, industrial controls, and automation systems.

Package

The NCA9555 is typically packaged in a TSSOP (Thin Shrink Small Outline Package) or a QFN (Quad Flat No-lead) package. These packages are designed for space-efficient mounting on printed circuit boards while providing reliable electrical performance.

Pinout

The NCA9555 is an I2C I/O port expander with a total of 16 pins. It features two 8-bit GPIO ports, allowing for the expansion of GPIO capabilities in microcontroller applications. Below are the key pin functions:
1. VCC: Power supply (usually 1.8V to 5.5V).
2. GND: Ground.
3. SDA: Serial Data Line for I2C communication.
4. SCL: Serial Clock Line for I2C communication.
5. INT: Interrupt output pin that signals when input states change.
6. GPIO0 - GPIO7: Configurable as inputs or outputs for general-purpose use (8 pins for each port).
7. A0, A1, A2: Address selection pins used to set the I2C address for multiple devices.
The device allows for remote control of pins, facilitating easy integration into various applications, especially in embedded systems.

Manufacturer

The NCA9555 is manufactured by NXP Semiconductors, a global semiconductor company known for its focus on automotive, security, and Internet of Things (IoT) applications. NXP is a leader in providing high-performance mixed-signal and standard product solutions. The company specializes in developing solutions for connected devices and is heavily involved in the automotive electronics sector, including vehicle networking and advanced driver-assistance systems (ADAS). NXP was formed in 2006 as a spin-off from Philips, and it has since grown to become a key player in the semiconductor industry, emphasizing innovation and providing products that enhance the functionality and efficiency of electronic systems.

Application

The NCA9555 is a GPIO (General Purpose Input/Output) expander used in various application areas, including industrial automation, consumer electronics, automotive systems, and smart home devices. It enables additional I/O pin expansion for microcontrollers, facilitating tasks like sensor interfacing, LED control, and communication with other peripherals. Its I2C interface allows for easy integration in complex systems requiring multiple input and output signals.

Equivalent

The NCA9555 chip is a dual I2C I/O port expander. Equivalent products include the PCA9555, MCP23017, and PCF8575. These alternatives provide similar functionality for GPIO expansion via I2C, but check specifications for features like voltage levels and pin counts to ensure compatibility with your application.

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