PCA9534RGVRG4

I/o Expanders Overview

The PCA9534RGVRG4 is an 8-bit I/O expander from Texas Instruments, designed for remote I2C and SMBus applications. 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 eight general-purpose digital input/output pins with configurable interrupt outputs. It is housed in a 16-pin VQFN package suitable for surface-mount assembly. The component includes configuration registers to set pin directions and offers ESD protection rated at 2 kV. It functions reliably across an operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides eight bidirectional digital I/O channels accessible via standard I2C or SMBus interfaces.
• Includes dedicated interrupt output pin to signal state changes on configured input ports.
• Features internal configuration registers allowing individual pin direction control.
• Supports low-power operation with wide supply voltage compatibility.

I/o Expanders Applications

• Remote I/O expansion in embedded systems requiring additional GPIO pins.
• Industrial control panels utilizing I2C communication buses.
• Consumer electronics devices needing low-power interface solutions.

I/o Expanders Procurement Notes

Verify the specific suffix 'G4' indicates lead-free composition and compliance with RoHS directives as per Texas Instruments documentation. Confirm the package type matches the required PCB footprint, specifically the VQFN-16 variant. Ensure the ordering part number aligns with current manufacturing status and availability through authorized distributors. Cross-reference datasheet revisions to confirm electrical characteristics remain consistent with design requirements.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with interrupt capability is required for I2C-based designs. Consider the 2.3 V minimum supply voltage if operating in low-voltage environments compared to other expanders starting at 1.65 V. Evaluate the VQFN-16 package constraints against available board space and thermal management needs. Verify that the 400 kHz maximum clock speed meets the system's bus timing requirements.

I/o Expanders Part Context

This part belongs to the PCA9534 family of 8-bit I/O expanders. It shares functional similarities with the TCA9534 series but differs in supply voltage specifications, with the PCA9534 starting at 2.3 V while the TCA9534 supports down to 1.65 V. Both families offer similar I2C interface capabilities and interrupt features, catering to different voltage domain requirements in mixed-signal systems.

I/o Expanders Replacement Considerations

The PCA9534DGVR serves as a pin-compatible alternative in a TVSOP-16 package. For lower voltage applications, the TCA9534 series provides similar functionality with a wider input voltage range. Verify register compatibility and interrupt polarity settings when substituting between these variants.