PCA9539RGER

I/o Expanders Overview

The PCA9539RGER is a low-power 16-bit I/O expander designed for I2C and SMBus interfaces. Manufactured by Texas Instruments, it operates within a supply voltage range of 2.3 V to 5.5 V. The device supports a maximum clock frequency of 400 kHz and includes interrupt output capabilities. It features configuration registers, an interrupt pin, and a reset pin. The component is housed in a VQFN-24 package suitable for surface mount applications. It functions across a temperature range of -40°C to +85°C with a typical operating current of 100 µA.

I/o Expanders Feature Summary

• Supports I2C and SMBus serial communication protocols
• Includes dedicated interrupt output functionality
• Features internal configuration registers for pin direction control
• Provides hardware reset capability via external pin

I/o Expanders Applications

• Portable consumer electronics requiring extended I/O
• Industrial control systems utilizing SMBus networks
• Embedded systems needing remote I/O expansion
• Battery-powered devices requiring low power consumption

I/o Expanders Procurement Notes

Verify the specific ordering suffix against official Texas Instruments documentation to ensure correct packaging and tape/reel specifications. Confirm that the VQFN-24 package variant matches the design requirements. Check for RoHS compliance status as indicated in the manufacturer's datasheet. Ensure the component meets the required humidity sensitivity level for the intended manufacturing process.

I/o Expanders Selection Notes

Select this component when a 16-bit I/O expansion solution is required for I2C or SMBus buses. It is suitable for designs operating between 2.3 V and 5.5 V. Consider the VQFN-24 package size for space-constrained PCB layouts. Verify that the 400 kHz interface speed meets system timing requirements. Evaluate the 100 µA operating current against total system power budgets.

I/o Expanders Part Context

The PCA9539RGER belongs to the PCA9539 family of low-power I/O expanders from Texas Instruments. This series provides general-purpose digital input and output expansion for microcontroller-based systems. The RGER suffix typically denotes a specific reel packaging format for surface-mount assembly. It shares functional similarities with other members of the family but differs in package type and specific electrical characteristics.

I/o Expanders Replacement Considerations

The TCA9539RGER is a compatible alternative offering similar functionality with a wider voltage range starting at 1.65 V. Other variants such as PCA9539DB or PCA9539PWR provide different package options like SSOP-24 or TSSOP-24 while maintaining core electrical performance.