PCA9534PWRG4

I/o Expanders Overview

The PCA9534PWRG4 is an 8-bit I/O expander from Texas Instruments designed for I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting low-power applications. The device features configuration registers that allow individual input or output selection for each port pin. It includes an interrupt output pin that activates when any input state differs from its corresponding register value. The component supports standard (100 kHz), fast (400 kHz), and high-speed modes, with eight hardware-configurable addresses. It is housed in a 16-pin TSSOP package.

I/o Expanders Feature Summary

• Configurable I/O ports allowing independent direction setting per pin via configuration registers
• Interrupt output mechanism signaling state changes on inputs relative to register values
• Wide operating voltage range compatible with various system power supplies
• Multiple address configurations enabling multiple devices on a single bus

I/o Expanders Applications

• Remote I/O expansion in embedded systems
• Consumer electronics requiring additional GPIO pins
• Industrial control systems utilizing I2C communication
• Low-power portable devices needing voltage level translation

I/o Expanders Procurement Notes

Verify the G4 suffix indicates lead-free status and compliance with RoHS directives as per Texas Instruments documentation. Confirm the specific tape and reel packaging quantity matches project requirements. Ensure the TSSOP-16 footprint aligns with PCB design constraints. Cross-reference the datasheet revision date to confirm current electrical characteristics and mechanical dimensions before finalizing procurement.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with interrupt capability is required for I2C-based designs. It is suitable for applications needing operation down to 1.65 V. Consider the TSSOP-16 package size for space-constrained layouts. Verify that the maximum clock frequency of 400 kHz meets system timing requirements. Ensure the eight available hardware addresses are sufficient for the target bus topology.

I/o Expanders Part Context

The PCA9534PWRG4 belongs to the PCA9534 family of remote 8-bit I/O expanders. It shares functional similarities with the PCA9534PW but differs in packaging and compliance specifications. The G4 suffix typically denotes lead-free construction and environmental compliance. This part serves as a bridge between microcontrollers and peripheral devices, extending digital I/O capabilities over the I2C bus.

I/o Expanders Replacement Considerations

The PCA9534DGVR is a documented alternative offering identical functionality in a TVSOP-16 package. Designers must verify pin-to-pin compatibility and ensure the different package dimensions fit the existing board layout. Other family members like the PCA9534DB provide similar features in SSOP-16 packages.