PCA9534ADBR

I/o Expanders Overview

The PCA9534ADBR is a remote 8-bit I2C and SMBus low-power I/O expander manufactured by Texas Instruments. It provides general-purpose digital input and output expansion via the I2C interface, supporting standard and fast modes up to 400 kHz. The device operates within a supply voltage range of 2.3 V to 5.5 V and features an interrupt output pin for efficient host notification. It includes configuration registers to set individual I/O directions and power-on reset (POR) functionality. Packaged in a 16-SSOP surface-mount case, it is designed for applications requiring extended I/O capabilities with low power consumption across a temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 8-bit general-purpose digital input and output expansion through I2C and SMBus interfaces
• Features an interrupt output pin that signals state changes to the host processor
• Includes configuration registers allowing independent direction control for each I/O pin
• Integrates power-on reset (POR) circuitry to ensure defined initial states upon power-up

I/o Expanders Applications

• Portable consumer electronics requiring additional GPIOs in space-constrained designs
• Industrial control systems utilizing I2C-based communication protocols
• Embedded systems needing low-power I/O expansion for sensor or actuator interfacing

I/o Expanders Procurement Notes

Verify component authenticity against Texas Instruments specifications before integration. Confirm package type matches the 16-SSOP requirement and check for recent product discontinuance notifications. Ensure supply chain sources provide valid traceability documentation. Validate electrical parameters against the official datasheet to guarantee compatibility with system voltage and timing requirements.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expander with interrupt capability is required for I2C/SMBus systems. Consider the 16-SSOP package for surface-mount assembly constraints. Evaluate the 2.3 V to 5.5 V operating range against system power rails. Compare against alternatives like the TCA9534 series if lower voltage operation below 2.3 V is necessary for specific application scenarios.

I/o Expanders Part Context

The PCA9534ADBR belongs to the PCA9534 family of remote I/O expanders from Texas Instruments. This series is designed for low-power applications requiring flexible I/O management over serial interfaces. The 'A' suffix typically denotes specific electrical characteristics or revisions within the family, while 'DBR' indicates the SSOP package and tape-and-reel shipping format. It serves as a solution for expanding microcontroller ports in compact electronic designs.

I/o Expanders Replacement Considerations

The TCA9534APWR is listed as a manufacturer-recommended alternative. Verify pinout compatibility and electrical specifications before substitution. Note that package differences may exist between SSOP and TSSOP variants, requiring PCB layout adjustments.