PCA9538PW

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PCA9538PW

IC I/O EXPANDER I2C 8B 16TSSOP

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  • Fr. Teil #PCA9538PW
  • Paket 16-TSSOP
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Spezifikationen

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)

Übersicht

Description

The PCA9538PW is an I2C bus I/O port expander designed by NXP Semiconductors. It features 8 GPIO (General Purpose Input/Output) pins, which can be configured as either inputs or outputs, allowing for flexibility in various applications. The device operates with a supply voltage range of 2.3V to 5.5V, making it suitable for a wide range of digital systems.
Key features include interrupt functionality for input state changes, programmable pull-up resistors, and a 2-wire I2C interface that supports multiple devices on the same bus. The PCA9538PW is widely used in applications such as LED control, button interfacing, and other scenarios where additional I/O lines are needed.
It is available in a compact TSSOP-20 package, which helps save PCB space. The device is popular in consumer electronics, industrial automation, and automotive applications due to its ease of integration and versatility.

Features

The PCA9538PW is an 8-bit I²C I/O port expander with interrupt capabilities. Key features include:
1. 8 GPIO Pins: Configurable as inputs or outputs, allowing flexibility in device integration.
2. I²C Interface: Supports standard mode (up to 100 kHz) and fast mode (up to 400 kHz) for efficient communication.
3. Interrupt Output: Provides an interrupt signal to alert the host controller of input state changes, facilitating real-time monitoring.
4. Voltage Range: Operates with a supply voltage from 2.3V to 5.5V, making it suitable for various applications.
5. Addressing: Supports up to 8 devices on the same I²C bus by configuring the device address through external pins.
6. Open-Drain Outputs: Output pins can be driven low while allowing for pull-up resistors to establish high states.
7. High-Noise Immunity: Features internal pull-up resistors and high input voltage thresholds for improved noise immunity.
These features make the PCA9538PW ideal for applications requiring additional I/O expansion in embedded systems.

Package

The PCA9538PW is packaged in a TSSOP (Thin Shrink Small Outline Package) with a 20-pin configuration.

Pinout

The PCA9538PW is an I²C I/O port expander with 8 GPIO pins. It features a 16-pin TSSOP package. The pin count and function are as follows:
1. VDD: Power supply input.
2. GND: Ground.
3. SCL: Serial clock line for I²C communication.
4. SDA: Serial data line for I²C communication.
5. A0, A1, A2: Address pins for I²C device address selection (3 bits).
6. P0 to P7: GPIO pins (8 total), configurable as input or output.
The PCA9538PW facilitates the expansion of GPIOs in microcontroller applications, allowing for increased connectivity in embedded systems. It operates on a voltage range of 2.3V to 5.5V and supports interrupt functionality for change detection on input pins.

Manufacturer

The PCA9538PW is manufactured by NXP Semiconductors. NXP is a global semiconductor company that specializes in designing and producing a wide range of integrated circuits, microcontrollers, and other semiconductor solutions. The company focuses on various markets, including automotive, industrial, IoT (Internet of Things), mobile, and communication infrastructure. NXP is known for its innovation in secure connectivity and smart solutions, providing essential components for modern electronic systems.

Application

The PCA9538PW is an I2C-bus I/O port expander with interrupt capability, commonly used in applications such as embedded systems, consumer electronics, industrial automation, and communication devices. It expands GPIO capabilities for microcontrollers, allowing more sensors and controls. Typical areas include LED control, keypad interfaces, and managing multiple peripherals in space-constrained environments. Its features support efficient device communication and system integration.

Equivalent

Equivalent products to the PCA9538PW chip include the PCF8575, MCP23017, and TCA9555. These chips offer similar functionalities for I2C GPIO expansion but may have different pin counts, operating voltages, or features. Always check the datasheets for specific compatibility and application requirements.

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