PCAL6524HEAZ NXP Semiconductors | Octopart Electronic Parts

Introduzione

The PCAL6524HEAZ from Xecor is an innovative I/O expander that brings extensive flexibility and robust performance to various electronic systems. Featuring 24 General Purpose Input/Output (GPIO) pins and a high-speed I2C interface, this device is designed for applications ranging from consumer electronics to industrial automation and IoT devices. With its ultra-low-voltage interface and comprehensive feature set, the PCAL6524HEAZ stands out as a versatile and reliable solution for expanding I/O capabilities. In this article, we will delve into the detailed features, pin configuration, applications, technical specifications, usage guidelines, and more to provide a thorough understanding of this powerful component.

Key Features

24 GPIO Pins

The PCAL6524HEAZ offers an impressive 24 GPIO pins, providing extensive flexibility for a wide array of applications. Each pin can be individually configured as an input or output, making the device highly adaptable to different requirements and enabling sophisticated control and monitoring functionalities.

High-Speed I2C Interface

Equipped with a Fast-mode Plus (Fm+) I2C interface, the PCAL6524HEAZ ensures efficient and reliable communication with other devices in the system. Operating at speeds up to 1 MHz, this feature is particularly beneficial in applications where high data transfer rates and robust communication are critical.

Ultra-Low-Voltage Interface

The PCAL6524HEAZ’s ultra-low-voltage interface allows for direct connection to a microcontroller operating down to 0.8 V. This capability is essential for modern, low-power designs, ensuring seamless integration and minimal power consumption.

Voltage-Level Translation

One of the standout features of the PCAL6524HEAZ is its support for bidirectional voltage-level translation. The device can interface with other components operating at different voltage levels, thanks to its dual supply voltages: VDD(I2C-bus) for the I2C interface and VDD(P) for the core circuits and Port P. This versatility simplifies system design and enhances compatibility.

Agile I/O Features

The PCAL6524HEAZ includes Agile I/O features such as programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, maskable interrupt, interrupt status register, and programmable open-drain or push-pull outputs. These features provide designers with the flexibility to fine-tune the device’s performance for specific applications.

Robust Interrupt Capabilities

The device’s open-drain interrupt (INT) output is activated when any input state differs from its corresponding Input Port register state. This output can also be configured to activate on input pin edges, providing flexibility in handling interrupt signals. The INT output can be connected to a microcontroller’s interrupt input, allowing the remote I/O to inform the microcontroller of incoming data on its ports without continuous communication via the I2C bus.

Built-In Level Shifting

The PCAL6524HEAZ is equipped with built-in level shifting capabilities, allowing it to interface with devices that operate at different voltage levels without the need for external components. This built-in functionality simplifies design and reduces the overall component count in the system.

Enhanced ESD Protection

With electrostatic discharge (ESD) protection that exceeds JESD 22 standards, the PCAL6524HEAZ ensures robust performance and reliability even in environments prone to ESD events. This enhanced protection safeguards the device against potential damage, prolonging its operational lifespan.

Pinout and Configuration

Power Supply Pins

The power supply pins of the PCAL6524HEAZ are designed to support specific voltage levels and power requirements. VDD(I2C-bus) supplies the voltage for the I2C interface, while VDD(P) provides the voltage for the core circuits and GPIO ports. Proper configuration of these pins is essential for ensuring safe and optimal operation.

I2C Interface Pins

The I2C interface pins consist of data (SDA) and clock (SCL) lines, which are crucial for establishing communication with other I2C-compatible devices. The device fully complies with the Fm+ I2C-bus specification, ensuring reliable and high-speed data transfer.

GPIO Pins

The 24 GPIO pins are numbered and detailed for easy identification and usage. Each pin can be configured as an input or output, providing users with the flexibility to customize the device according to their specific needs. The GPIO pins also support various features such as programmable pull-up/pull-down resistors and output drive strength.

Additional Functional Pins

The device includes several additional functional pins, such as the RESET pin for resetting the device, the INT pin for interrupt signaling, and a hardware address pin (ADDR) for varying the I2C-bus address. These pins enhance the device’s functionality and ease of integration into different systems.

Applications

Elettronica di consumo

In the realm of consumer electronics, the PCAL6524HEAZ enhances functionality and user interfaces. It can be used in devices such as smart TVs, gaming consoles, and home automation systems to expand input/output capabilities, enabling more sophisticated control and interaction.

Automazione industriale

The PCAL6524HEAZ is an asset in industrial automation, where it provides control and monitoring capabilities. It can be integrated into machinery and industrial systems to enhance performance and reliability, enabling precise control over various processes.

IoT Devices

For Internet of Things (IoT) applications, the PCAL6524HEAZ facilitates connectivity and sensor integration. It enables IoT devices to interface with various sensors and actuators, contributing to the development of smart and connected systems that can monitor and respond to environmental changes in real-time.

Technical Specifications

Operating Voltage

The PCAL6524HEAZ operates within a detailed voltage range, ensuring safe and reliable performance. The operating voltage for the I2C-bus side ranges from 0.8 V to 3.6 V, while the voltage for Port P ranges from 1.8 V to 5.5 V. Understanding the operating voltage is crucial for integrating the device into various systems.

Current Consumption

One of the critical technical specifications is the low current draw of the PCAL6524HEAZ. The device consumes minimal power, with a standby current consumption of just 2.0 µA typical at 3.3 V VDD(P). This feature makes it suitable for energy-sensitive applications, where minimizing power consumption is essential.

Temperature Range

The device is designed to operate within specific temperature limits, ensuring reliability across different environments. The operating temperature range for the PCAL6524HEAZ is from -40°C to +85°C, making it suitable for use in a variety of conditions, including industrial and outdoor applications.

Additional Specifications

Schmitt trigger action for noise tolerance and signal integrity.
5.5 V tolerant I/O ports and 3.6 V tolerant I2C-bus pins.
Active LOW reset input (RESET) and open-drain active LOW interrupt output (INT).
Internal power-on reset and noise filter on SCL/SDA inputs.
Latched outputs with 25 mA drive maximum capability for directly driving LEDs.
Built-in level shifting capabilities.
Latch-up performance exceeding 100 mA per JESD 78, Class II.
ESD protection exceeding JESD 22.

Usage Guidelines

Integration

Integrating the PCAL6524HEAZ into a circuit involves specific steps to ensure proper functionality. These steps include connecting the power supply pins correctly, configuring the I2C interface pins, and setting up the GPIO pins according to the application requirements. Following these guidelines can help avoid common pitfalls and ensure a smooth implementation.

Safety Considerations

Handling and operating the PCAL6524HEAZ require certain precautions to avoid damage. These include ensuring that the voltage levels are within the specified range, avoiding electrostatic discharge, and following proper soldering techniques. Adhering to these safety guidelines helps protect the device and extends its operational lifespan.

Datasheet Reference

For engineers and developers working with the PCAL6524HEAZ, the detailed datasheet provides in-depth technical information. The datasheet includes comprehensive details on the device’s features, pin configuration, electrical characteristics, and application guidelines. It is an essential resource for understanding the full capabilities and specifications of the device, and it can be accessed on the manufacturer’s website.

Conclusione

The PCAL6524HEAZ from Xecor is a versatile and high-performance I/O expander that offers 24 GPIO pins, a high-speed I2C interface, and robust design features. Its low power consumption, voltage-level translation capabilities, and comprehensive feature set make it an excellent choice for a wide range of applications, including consumer electronics, industrial automation, and IoT devices. By following the usage guidelines and referring to the datasheet, users can maximize the potential of this powerful component and enhance the functionality of their systems.

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FAQ

Q1: What is the primary function of the PCAL6524HEAZ?

A1: The PCAL6524HEAZ is a 24-bit general-purpose I/O expander that enables remote I/O expansion for most microcontroller families through the Fast-mode Plus (Fm+) I2C-bus interface.

Q2: How does the high-speed I2C interface benefit the PCAL6524HEAZ?

A2: The high-speed I2C interface supports data transfer speeds up to 1 MHz, ensuring efficient and reliable communication with other I2C-compatible devices.

Q3: Can the PCAL6524HEAZ operate with devices at different voltage levels?

A3: Yes, the PCAL6524HEAZ supports bidirectional voltage-level translation, allowing it to interface seamlessly with devices operating at different voltage levels (between 0.8 V to 3.6 V for SCL