NXP USA Inc. PCAL6524HEHP

The PCAL6524HEHP is a 24-bit general-purpose I/O expander produced by NXP USA Inc. This device is designed to provide remote I/O expansion for various microcontroller families via the Fast-mode Plus (Fm+) I²C-bus interface. It is particularly useful in applications where additional I/O pins are required while minimizing interconnections. The PCAL6524HEHP supports ultra-low-voltage operation, allowing direct connection to microcontrollers operating down to 0.8 V, and it features built-in level shifting to facilitate communication between different voltage levels.

• Agile I/O Features: Programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, and maskable interrupt.
• Level Shifting: Bi-directional voltage level translation between the I²C-bus interface and the I/O port, allowing communication between different voltage levels.
• Interrupt Capabilities: Interrupt output can be specified by level or edge, and can be cleared individually without disturbing other interrupt events. The interrupt status register identifies the source of an interrupt.
• Power-on Reset (POR): Robust against power fluctuations with a built-in POR feature.
• Low Power Consumption: Ultra-low standby current of 1.5 uA, making it suitable for battery-powered applications.
• Flexible Output Configuration: Output port configuration can be set to either push-pull or open-drain output stages, and the output drive strength is programmable.
• Switch Debounce Hardware: Implemented to handle input signal debouncing.

• Industrial Controls: Suitable for industrial automation and control systems.
• Automotive Applications: Used in automotive displays and other automotive systems.
• Home Automation: Ideal for smart home devices and home automation systems.
• Server Management: Useful in server management and data center applications.
• LED Dimming and Keypad Scanning: Can be used for LED dimming, keypad scanning, and other general-purpose I/O expansion needs.
• Industrial IoT and Smart Energy Solutions: Applicable in industrial IoT and smart energy solutions.

1. Q: What is the PCAL6524HEHP used for?

   A: The PCAL6524HEHP is a 24-bit general-purpose I/O expander used to provide remote I/O expansion for microcontroller systems via the I²C-bus interface.

2. Q: What is the voltage supply range of the PCAL6524HEHP?

   A: The PCAL6524HEHP operates within a voltage supply range of 1.65 V to 5.5 V.

3. Q: What is the clock frequency of the PCAL6524HEHP?

   A: The PCAL6524HEHP supports a clock frequency up to 1 MHz.

4. Q: Does the PCAL6524HEHP support level shifting?

   A: Yes, the PCAL6524HEHP features bi-directional voltage level translation between the I²C-bus interface and the I/O port.

5. Q: What are the key features of the Agile I/O in the PCAL6524HEHP?

   A: The Agile I/O features include programmable output drive strength, latchable inputs, programmable pull-up/pull-down resistors, and maskable interrupt.

6. Q: How does the interrupt output work in the PCAL6524HEHP?

   A: The interrupt output can be specified by level or edge and can be cleared individually without disturbing other interrupt events. The interrupt status register identifies the source of an interrupt.

7. Q: What is the operating temperature range of the PCAL6524HEHP?

   A: The PCAL6524HEHP operates within a temperature range of -40°C to 85°C.

8. Q: Is the PCAL6524HEHP suitable for battery-powered applications?

   A: Yes, the PCAL6524HEHP is suitable for battery-powered applications due to its ultra-low standby current of 1.5 uA.

9. Q: What package type does the PCAL6524HEHP come in?

   A: The PCAL6524HEHP comes in a 32-UFQFN Exposed Pad (32-HUQFN, 5x5) package.

10. Q: What warranty is offered for the PCAL6524HEHP by some distributors?

    A: Some distributors, like Ovaga, offer a 1-year warranty on the PCAL6524HEHP, covering any defects in materials and workmanship under normal use.