PCA8575PW,112

I/o Expanders Overview

The PCA8575PW,112 is a remote 16-bit I/O expander for the I2C-bus with an interrupt output. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum clock frequency of 400 kHz. The device features latched outputs with a sink capability of 25 mA per bit and a total package sink capability of 400 mA. It includes an active LOW open-drain interrupt output and allows for 8 programmable slave addresses using three address pins. The component functions within an ambient temperature range of -40 °C to +85 °C.

I/o Expanders Feature Summary

• Provides general purpose remote I/O expansion via a two-line bidirectional I2C-bus interface.
• Features quasi-bidirectional ports that default to inputs at power-up.
• Includes an interrupt line to notify microcontrollers of incoming data without bus communication.
• Offers high current drive capability for directly driving LEDs.

I/o Expanders Applications

• LED signs and displays
• Industrial control systems
• Medical equipment
• Programmable logic controllers (PLCs)
• Cellular telephones

I/o Expanders Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and tape-and-reel specifications. Confirm RoHS compliance status through manufacturer datasheets or environmental declarations. Ensure the component meets required operating temperature ranges for the intended application environment before finalizing procurement decisions.

I/o Expanders Selection Notes

Select this component when a system requires expanding microcontroller I/O capabilities over an I2C bus. Consider the 25 mA per-pin sink capability for direct LED driving applications. Verify that the available address space accommodates the required number of devices on the bus. Ensure the host microcontroller supports the I2C protocol and can handle the interrupt signaling mechanism effectively.

I/o Expanders Part Context

The PCA8575PW,112 belongs to the PCA8575 family of 16-bit I/O expanders manufactured by NXP Semiconductors. This family provides versatile remote I/O solutions for various microcontroller architectures. The PW suffix indicates the TSSOP24 plastic thin shrink small outline package variant, offering a compact footprint suitable for space-constrained designs.

I/o Expanders Replacement Considerations

The PCF8575 serves as a drop-in replacement for the PCA8575 without electrical or software modifications. Note differences in interrupt output release timing during read operations between these variants. Other compatible options include the PCA9673, which offers higher bus speeds and drive capabilities.