PCA9535RTWR

I/o Expanders Overview

The PCA9535RTWR is a remote 16-bit I/O expander designed for I2C and SMBus protocols. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features configuration registers and an interrupt pin, housed in a WQFN-24 package suitable for surface mount installation. It functions across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Supports bidirectional data transfer via I2C and SMBus interfaces
• Includes dedicated interrupt output pin for event signaling
• Provides individual configuration registers for input/output direction control

I/o Expanders Applications

• Portable systems requiring low power consumption
• Industrial control applications with limited GPIO availability
• Consumer electronics utilizing I2C bus architectures

I/o Expanders Procurement Notes

Verify the specific suffix RTWR against official Texas Instruments documentation to confirm the reel packaging format and tape width. Ensure compatibility with existing PCB footprints for the WQFN-24 package before procurement. Confirm moisture sensitivity levels and reflow soldering profiles align with assembly requirements.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is required on an I2C or SMBus network. The WQFN-24 package offers a compact solution for space-constrained designs. Verify that the operating voltage range of 2.3 V to 5.5 V matches the system power rails and that the interrupt functionality meets the host controller's polling or interrupt handling capabilities.

I/o Expanders Part Context

This part belongs to the PCA9535 family of I/O expanders from Texas Instruments. It serves as a remote peripheral to increase general-purpose I/O lines for microcontrollers or processors. The RTWR suffix specifically denotes the reel packaging variant, distinguishing it from cut-tape or tube options within the same functional series.

I/o Expanders Replacement Considerations

The TCA9535RTWR is listed as a related product in distributor catalogs. Verify electrical specifications and pinout compatibility before substitution. Other variants like PCA9535RGER differ primarily in package type (VQFN vs WQFN) while maintaining similar core functionality.