PCA9534ADB

I/o Expanders Overview

The PCA9534ADB is a remote 8-bit I2C and SMBus low-power I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.65V to 5.5V, supporting multiple logic voltage levels including 1.80V, 2.50V, 3.30V, and 5.00V. The device features an interrupt output and configuration registers for flexible system integration. It supports clock frequencies up to 400 kHz and functions reliably across an operating temperature range of -40°C to +85°C. The component is housed in a 16-pin SOIC package.

I/o Expanders Feature Summary

• Provides eight general-purpose digital input and output ports accessible via the I2C or SMBus interface.
• Includes dedicated configuration registers that allow individual pins to be defined as inputs or outputs.
• Features an interrupt output pin that signals state changes on input ports to the host processor.

I/o Expanders Applications

• Portable battery-powered devices requiring low power consumption
• Industrial control systems utilizing I2C communication
• Consumer electronics with limited microcontroller GPIO availability

I/o Expanders Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and electrical characteristics. Ensure compatibility with existing PCB footprints and signal integrity requirements before procurement. Confirm RoHS compliance status through current manufacturer documentation.

I/o Expanders Selection Notes

Select this component when an 8-bit expansion is required for I2C-based architectures. Consider the 1.65V minimum supply voltage for low-power applications. Verify that the 400 kHz speed meets system timing constraints and that the SOIC package fits the design layout.

I/o Expanders Part Context

This part belongs to the PCA9534 family of I/O expanders from Texas Instruments. It serves as a bridge between high-speed microcontrollers and slower peripheral devices, allowing system designers to extend I/O capabilities without consuming additional processor pins.

I/o Expanders Replacement Considerations

The TCA9534 series offers similar functionality with extended voltage ranges. Verify pinout compatibility and register mapping before substitution. Check for any differences in interrupt polarity or drive strength specifications.