PCA9534DW

I/o Expanders Overview

The PCA9534DW is a 16-pin CMOS device providing 8 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C and SMBus applications. It operates within a power supply voltage range of 2.3 V to 5.5 V and supports clock frequencies from 0 kHz to 400 kHz. The component features 5 V tolerant I/Os, an active low interrupt output, and individual I/O configuration registers. It includes noise filters on SCL/SDA inputs, internal power-on reset, and ESD protection exceeding 2000 V HBM. The device is housed in a SOIC-16 package.

I/o Expanders Feature Summary

• Provides 8-bit I2C GPIO expansion with configurable input/output directions
• Features an active low interrupt output pin for efficient event handling
• Includes polarity inversion register for flexible signal logic management

I/o Expanders Applications

• ACPI power switch control
• Sensor interface expansion
• Pushbutton and LED matrix scanning

I/o Expanders Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-16 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the supplier provides valid traceability records for quality assurance purposes.

I/o Expanders Selection Notes

Select this component when 8-bit I/O expansion is required over I2C/SMBus interfaces. It is suitable for systems needing 5 V tolerance on I/O lines while operating at lower core voltages. Consider the SOIC-16 package constraints regarding board space and thermal dissipation requirements during PCB layout planning.

I/o Expanders Part Context

This part belongs to the PCA9534 family of remote 8-bit I/O expanders. It shares functional similarities with other members like the PCA9534PW and PCA9534DB but differs in physical packaging. The DW suffix specifically denotes the SOIC-16 plastic small outline package variant manufactured by Texas Instruments.

I/o Expanders Replacement Considerations

Direct substitutes include PCA9534PW (TSSOP-16) and PCA9534DB (SSOP-16). Verify pin compatibility and package dimensions before substitution. Cross-reference with NXP PCA9534 variants for functional equivalence if Texas Instruments stock is unavailable.