Specifications
| Attribute | Value |
| Package | Tape & Reel (TR),Cut Tape (CT) |
| ProductStatus | Not For New Designs |
| NumberofI/O | 8 |
| Interface | I²C, SMBus |
| InterruptOutput | Yes |
| Features | POR |
| OutputType | Push-Pull |
| Current-OutputSource/Sink | 10mA, 25mA |
| ClockFrequency | 400 kHz |
| Voltage-Supply | 2.3V ~ 5.5V |
| OperatingTemperature | -40°C ~ 85°C |
| MountingType | Surface Mount |
| Package/Case | 16-TSSOP (0.173, 4.40mm Width) |
Overview
Description
The PCA9554PWR is an I2C-bus controlled GPIO (General Purpose Input/Output) expander with 8-bit I/O ports. Manufactured by Texas Instruments, it allows for additional digital I/O ports when microcontrollers have limited GPIO capacity. This device operates over a supply voltage range of 2.3 V to 5.5 V, making it suitable for various applications.
Key features include an interrupt output to signal input state changes and programmable polarity for the interrupt. It supports both input and output operations, allowing each pin to be individually configured. The PCA9554PWR is designed for easy integration into systems through its I2C interface, supporting standard and fast I2C communication speeds.
This chip is widely used in embedded systems, consumer electronics, and industrial applications where additional GPIO ports are required. The power-on reset ensures that the device initializes to a known state, enhancing reliability. The compact TSSOP (Thin Shrink Small Outline Package) form factor allows for space-efficient PCB design. Overall, the PCA9554PWR is a versatile and cost-effective solution for expanding input/output capabilities in various electronic designs.
Key features include an interrupt output to signal input state changes and programmable polarity for the interrupt. It supports both input and output operations, allowing each pin to be individually configured. The PCA9554PWR is designed for easy integration into systems through its I2C interface, supporting standard and fast I2C communication speeds.
This chip is widely used in embedded systems, consumer electronics, and industrial applications where additional GPIO ports are required. The power-on reset ensures that the device initializes to a known state, enhancing reliability. The compact TSSOP (Thin Shrink Small Outline Package) form factor allows for space-efficient PCB design. Overall, the PCA9554PWR is a versatile and cost-effective solution for expanding input/output capabilities in various electronic designs.
Equivalent
The PCA9554PWR is a GPIO expander with I2C interface. Equivalent products include the PCF8574 and PCF8574A from NXP, the MCP23008 from Microchip, and the TCA9534 from Texas Instruments. These alternatives offer similar I2C-based GPIO expansion capabilities and can serve as replacements depending on your application requirements. Always check pin compatibility and electrical specifications when considering substitutes.
Features
The PCA9554PWR is an I²C-bus I/O port expander with interrupt and reset capabilities, manufactured by Texas Instruments. It features 8-bit I/O ports, which can be configured as either inputs or outputs, making it suitable for applications that require additional GPIOs. The device supports a wide supply voltage range from 2.3V to 5.5V, allowing for compatibility with various systems. It operates at I²C frequencies up to 400 kHz (Fast-mode), making it efficient for most communication needs. The PCA9554PWR includes an interrupt output that alerts the host controller of input state changes, optimizing system response. Moreover, it has a hardware reset pin, enabling a return to default settings if needed. With a low standby current, it is energy efficient, ideal for battery-operated devices. It is packaged in a TSSOP-16, contributing to its compact form factor. The device is versatile for use in consumer electronics, industrial control, and other applications requiring expanded I/O capabilities.
Pinout
The PCA9554PWR is an I²C-bus I/O port with 8-bit input/output ports. It is designed to provide a simple solution for interfacing microcontrollers with peripheral devices.
The PCA9554PWR comes in a 16-pin package. Here's a brief overview of its main functions:
1. I²C Interface: It allows communication with a microcontroller via the I²C-bus, utilizing two lines: Serial Clock (SCL) and Serial Data (SDA).
2. I/O Ports: It provides 8-bit parallel input/output ports (P0.0 to P0.7) that can be individually programmed as input or output. These pins are used to connect to external devices and can be dynamically configured.
3. Interrupt Output: An interrupt output pin (INT) alerts the microcontroller when there is a change in state at the input ports.
4. Address Pins: Three hardware address pins (A0, A1, A2) allow up to 8 PCA9554 devices on the same I²C bus without address conflicts.
5. Power Supply: Requires a VCC pin for power and a GND pin for ground reference.
The PCA9554PWR is widely used in various applications for its ability to expand the I/O capabilities of a microcontroller with minimal pins.
The PCA9554PWR comes in a 16-pin package. Here's a brief overview of its main functions:
1. I²C Interface: It allows communication with a microcontroller via the I²C-bus, utilizing two lines: Serial Clock (SCL) and Serial Data (SDA).
2. I/O Ports: It provides 8-bit parallel input/output ports (P0.0 to P0.7) that can be individually programmed as input or output. These pins are used to connect to external devices and can be dynamically configured.
3. Interrupt Output: An interrupt output pin (INT) alerts the microcontroller when there is a change in state at the input ports.
4. Address Pins: Three hardware address pins (A0, A1, A2) allow up to 8 PCA9554 devices on the same I²C bus without address conflicts.
5. Power Supply: Requires a VCC pin for power and a GND pin for ground reference.
The PCA9554PWR is widely used in various applications for its ability to expand the I/O capabilities of a microcontroller with minimal pins.
Manufacturer
The PCA9554PWR is manufactured by Texas Instruments (TI). Texas Instruments is a global semiconductor company that designs and manufactures a wide range of electronic components and integrated circuits. TI's products are used in various applications, including consumer electronics, automotive systems, industrial equipment, communications infrastructure, and more. The company is well-known for its innovation and development in the fields of analog and embedded processing products.
Application
The PCA9554PWR is a general-purpose I/O expander that is commonly used in applications requiring additional digital input/output pins. It is useful in microcontroller-based systems where I/O resources are limited. Key application areas include:
1. Consumer Electronics: Enhancing I/O capabilities in smart appliances and home automation.
2. Industrial Automation: Expanding control interfaces for machinery and equipment.
3. Telecommunications: Managing indicator LEDs and control signals in network equipment.
4. Automotive Electronics: Supporting control systems and dashboard electronics.
5. Embedded Systems: Facilitating prototyping and development in projects with limited GPIO availability.
Its I2C interface makes it easy to integrate into various systems, allowing communication with multiple devices over a simple bus.
1. Consumer Electronics: Enhancing I/O capabilities in smart appliances and home automation.
2. Industrial Automation: Expanding control interfaces for machinery and equipment.
3. Telecommunications: Managing indicator LEDs and control signals in network equipment.
4. Automotive Electronics: Supporting control systems and dashboard electronics.
5. Embedded Systems: Facilitating prototyping and development in projects with limited GPIO availability.
Its I2C interface makes it easy to integrate into various systems, allowing communication with multiple devices over a simple bus.
Package
The PCA9554PWR is an I2C-bus I/O port with a low-power CMOS device, packaged in a TSSOP (Thin Shrink Small Outline Package) with 16 pins. This package type is known for its compact size and suitability for surface-mounting on printed circuit boards.
