PCA8575BS,118

I/o Expanders Overview

The PCA8575BS,118 is a remote 16-bit I/O expander for the I2C-bus with an interrupt output. It provides general-purpose remote I/O expansion for microcontroller families via a two-line bidirectional I2C interface (SCL and SDA). The device features a 16-bit quasi-bidirectional port and latched outputs with high current drive capability for directly driving LEDs. It includes an active LOW open-drain interrupt line that allows the remote I/O to inform the microcontroller of incoming data without bus communication. The internal Power-On Reset initializes the I/Os as inputs.

I/o Expanders Feature Summary

• Supports 400 kHz I2C-bus interface with 2.3 V to 5.5 V operation and 5.5 V tolerant I/Os
• Features 16-bit remote I/O pins that default to inputs at power-up
• Includes latched outputs with 25 mA sink capability for directly driving LEDs
• Provides an active LOW open-drain interrupt output

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control
• Medical equipment
• PLCs

I/o Expanders Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and tape/reel specifications. Ensure compatibility with system voltage requirements and address pin configurations before integration. Cross-reference the part number with the latest datasheet revision to confirm all electrical characteristics and mechanical dimensions.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O expansion solution is required on an I2C bus. Consider the HVQFN24 package for space-constrained designs requiring thermal performance. Verify that the system can accommodate the 8 programmable slave addresses provided by the three address pins. Ensure the microcontroller supports the I2C protocol and interrupt handling capabilities.

I/o Expanders Part Context

The PCA8575BS,118 belongs to the PCA8575 family of 16-bit I/O expanders manufactured by NXP Semiconductors. This family offers various package options including SO24, SSOP24, TSSOP24, HVQFN24, and DHVQFN24. The BS variant specifically denotes the HVQFN24 package. These devices are designed for low standby current consumption and provide robust ESD protection.

I/o Expanders Replacement Considerations

The PCF8575 is documented as a drop-in replacement for the PCA8575 without electrical or software modifications, though interrupt release timing differs during read operations. The PCA9673 serves as an upgrade option offering higher I2C speed and drive capabilities.