PCA9537DP,118

I/o Expanders Overview

The PCA9537DP,118 is a 4-bit I2C-bus and SMBus low power I/O port with interrupt and reset. It provides General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications. The device operates within an operating power supply voltage range of 2.3 V to 5.5 V. It features 5 V tolerant I/Os and includes a polarity inversion register. The open-drain interrupt output is activated when any input state differs from its corresponding Input Port register state. The device supports a clock frequency of 0 Hz to 400 kHz. It is offered in a TSSOP10 package.

I/o Expanders Feature Summary

• Provides 4 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset capabilities.
• Features an active LOW interrupt output that activates when an input state changes.
• Includes an active LOW reset input for initializing the device without de-powering.
• Offers 5 V tolerant I/Os suitable for various system controller interfaces.

I/o Expanders Applications

• ACPI power switches
• Sensors
• Push-buttons
• LEDs
• Fans

I/o Expanders Procurement Notes

Verify the exact ordering part number against the manufacturer's current documentation before procurement. Confirm the package type and temperature range requirements match the specific application needs. Ensure compliance with RoHS standards as specified in the product data sheet. Check for any recent product change notices or discontinuation updates that may affect long-term availability.

I/o Expanders Selection Notes

Select this component when additional I/O expansion is required for I2C-bus or SMBus applications. Consider the fixed I2C-bus address limitation, which allows only one device on the same bus. Evaluate the need for interrupt and reset functionalities. Ensure the operating voltage range aligns with the system controller's supply voltage. Verify the package size constraints fit the design layout.

I/o Expanders Part Context

The PCA9537 is part of NXP Semiconductors' family of I2C-bus I/O expanders. It was developed to enhance the existing series by providing a simple solution for adding extra I/O pins. The device integrates configuration, input, output, and polarity inversion registers. It is designed to minimize interconnections while expanding system capabilities.

I/o Expanders Replacement Considerations

PCA9537DPZ is documented as a drop-in replacement for PCA9537DP,118 according to PCN 2020104008A. This packing method uses a Static Shielding Bag (SSB) solution. Material should be kept in the sealed bag between uses.