Specifications
| Attribute | Value |
| Package | Tube |
| ProductStatus | Obsolete |
| 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 PCA9538PW is a low-voltage 8-bit I/O port with interrupt and reset capabilities, manufactured by NXP Semiconductors. It operates as an I2C-bus slave, allowing for communication with a microcontroller via the I2C protocol. The device features eight general-purpose I/O pins, which can be configured as either inputs or outputs.
Key features include an interrupt output pin that alerts the microcontroller to any changes in the input port, providing efficient monitoring of pin states without continuous polling. The PCA9538PW supports a supply voltage range from 2.3V to 5.5V, making it suitable for a variety of applications. It also includes a reset pin to restore default settings and ensure reliable operation.
Housed in a TSSOP (Thin Shrink Small Outline Package) with 16 pins, the PCA9538PW is ideal for space-constrained applications. Its low power consumption and versatile I/O expandability make it popular in consumer electronics, industrial control, and other applications requiring flexible I/O management.
Key features include an interrupt output pin that alerts the microcontroller to any changes in the input port, providing efficient monitoring of pin states without continuous polling. The PCA9538PW supports a supply voltage range from 2.3V to 5.5V, making it suitable for a variety of applications. It also includes a reset pin to restore default settings and ensure reliable operation.
Housed in a TSSOP (Thin Shrink Small Outline Package) with 16 pins, the PCA9538PW is ideal for space-constrained applications. Its low power consumption and versatile I/O expandability make it popular in consumer electronics, industrial control, and other applications requiring flexible I/O management.
Equivalent
The PCA9538PW is an I2C-bus I/O port with 8-bit output that is functionally similar to several other products. Equivalent alternatives include:
1. PCF8574 - Another 8-bit I2C I/O expander.
2. TCA9538 - From Texas Instruments, similar functionality.
3. MCP23008 - From Microchip, an 8-bit I/O expander with similar features.
4. MAX7300 - From Maxim Integrated, offers 20-port expandability including 8-bit compatibility.
These alternatives provide similar I2C-bus I/O expansion capabilities.
1. PCF8574 - Another 8-bit I2C I/O expander.
2. TCA9538 - From Texas Instruments, similar functionality.
3. MCP23008 - From Microchip, an 8-bit I/O expander with similar features.
4. MAX7300 - From Maxim Integrated, offers 20-port expandability including 8-bit compatibility.
These alternatives provide similar I2C-bus I/O expansion capabilities.
Features
The PCA9538PW is an I²C-bus controlled 8-bit I/O expander from NXP Semiconductors. Key features include:
1. I²C Interface: Operates as a slave device on the I²C bus, supporting standard and fast mode up to 400 kHz.
2. GPIO Expansion: Provides eight general-purpose I/O pins that can be configured individually as inputs or outputs.
3. Voltage Range: Supports a wide voltage range from 2.3V to 5.5V, making it compatible with various microcontrollers.
4. Low Standby Current: Offers low power consumption in standby mode, which is ideal for battery-powered applications.
5. Interrupt Output: Features an interrupt output that signals changes in input states, reducing the need for constant polling.
6. Polarity Inversion: Each input can be inverted, allowing for flexible signal processing.
7. Bit Masking: Allows for selective reading and writing of the I/O pins.
8. Compact Package: Available in TSSOP and HVQFN packages, saving space in compact designs.
Overall, the PCA9538PW is a versatile component for expanding I/O capabilities with minimal processor overhead.
1. I²C Interface: Operates as a slave device on the I²C bus, supporting standard and fast mode up to 400 kHz.
2. GPIO Expansion: Provides eight general-purpose I/O pins that can be configured individually as inputs or outputs.
3. Voltage Range: Supports a wide voltage range from 2.3V to 5.5V, making it compatible with various microcontrollers.
4. Low Standby Current: Offers low power consumption in standby mode, which is ideal for battery-powered applications.
5. Interrupt Output: Features an interrupt output that signals changes in input states, reducing the need for constant polling.
6. Polarity Inversion: Each input can be inverted, allowing for flexible signal processing.
7. Bit Masking: Allows for selective reading and writing of the I/O pins.
8. Compact Package: Available in TSSOP and HVQFN packages, saving space in compact designs.
Overall, the PCA9538PW is a versatile component for expanding I/O capabilities with minimal processor overhead.
Pinout
The PCA9538PW is an I2C-bus controlled 8-bit I/O port with interrupt capabilities. It is housed in a TSSOP package and has a total of 16 pins. The primary function of the PCA9538PW is to provide additional GPIO (General Purpose Input/Output) ports that can be controlled via an I2C interface. Each of the 8 I/O pins can be configured as an input or an output.
Here is a basic overview of the pin functions:
- Pins 1-8 (P0-P7): These are the I/O pins that can be individually programmed as inputs or outputs.
- Pin 9 (GND): Ground reference.
- Pin 10 (INT): Interrupt output pin, active low.
- Pin 11 (SCL): Serial clock input for I2C bus.
- Pin 12 (SDA): Serial data input/output for I2C bus.
- Pin 13 (A2), Pin 14 (A1), Pin 15 (A0): Address pins used to set the I2C slave address.
- Pin 16 (VCC): Supply voltage.
This design allows the device to expand I/O capabilities in microcontroller-based systems efficiently.
Here is a basic overview of the pin functions:
- Pins 1-8 (P0-P7): These are the I/O pins that can be individually programmed as inputs or outputs.
- Pin 9 (GND): Ground reference.
- Pin 10 (INT): Interrupt output pin, active low.
- Pin 11 (SCL): Serial clock input for I2C bus.
- Pin 12 (SDA): Serial data input/output for I2C bus.
- Pin 13 (A2), Pin 14 (A1), Pin 15 (A0): Address pins used to set the I2C slave address.
- Pin 16 (VCC): Supply voltage.
This design allows the device to expand I/O capabilities in microcontroller-based systems efficiently.
Manufacturer
The PCA9538PW is manufactured by NXP Semiconductors. NXP is a global semiconductor company that specializes in the design and production of various kinds of semiconductor devices and solutions. The company focuses on creating products for automotive, industrial, mobile, and communication infrastructure markets, among others. They are known for their work in areas such as automotive processing, secure identification solutions, and wireless connectivity. NXP is headquartered in Eindhoven, Netherlands, and operates worldwide, serving a diverse range of industries with its advanced technologies.
Application
The PCA9538PW is an I²C-bus controlled 8-bit I/O expander, commonly used in applications where microcontrollers or other digital systems require additional I/O pins. Key application areas include:
1. Consumer Electronics: Expanding I/O ports in devices like TVs and set-top boxes.
2. Industrial Automation: Controlling sensors, relays, and other peripherals in machinery.
3. Automotive Systems: Managing dashboard indicators or infotainment systems.
4. Home Automation: Enabling smart home devices to communicate with multiple sensors or actuators.
5. Networking Equipment: Providing additional control lines for routers and switches.
6. Medical Devices: Facilitating communication between processors and numerous sensors or user interfaces.
Its versatility in expanding I/O capabilities makes it useful in diverse electronic systems.
1. Consumer Electronics: Expanding I/O ports in devices like TVs and set-top boxes.
2. Industrial Automation: Controlling sensors, relays, and other peripherals in machinery.
3. Automotive Systems: Managing dashboard indicators or infotainment systems.
4. Home Automation: Enabling smart home devices to communicate with multiple sensors or actuators.
5. Networking Equipment: Providing additional control lines for routers and switches.
6. Medical Devices: Facilitating communication between processors and numerous sensors or user interfaces.
Its versatility in expanding I/O capabilities makes it useful in diverse electronic systems.
Package
The PCA9538PW is housed in a TSSOP (Thin Shrink Small Outline Package), specifically a 16-pin TSSOP. This package type is compact, suitable for surface-mount technology, and is often used in applications where space is limited.
