PCA9534BS3,118

I/o Expanders Overview

The PCA9534BS3,118 is an 8-bit I2C-bus and SMBus low-power I/O port with interrupt. It provides General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications. The device operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. It features 5 V tolerant I/Os, polarity inversion, and active LOW interrupt output. The component includes noise filters on SCL/SDA inputs and internal power-on reset. It is housed in an HVQFN16 package with dimensions of 3 x 3 x 0.85 mm.

I/o Expanders Feature Summary

• Provides 8-bit I2C-bus GPIO expansion with individual I/O configuration capabilities
• Features active LOW open-drain interrupt output triggered by input state changes
• Includes polarity inversion register for flexible logic level handling
• Offers 5 V tolerant I/Os suitable for mixed-voltage system integration

I/o Expanders Applications

• ACPI power switches
• Sensors
• Push buttons
• LEDs
• Fans

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',118' corresponds to the reel packing method and standard marking requirements as defined in the official NXP documentation. Confirm that the HVQFN16 package variant matches the required board layout specifications, particularly regarding the exposed thermal pad soldering for proper operation.

I/o Expanders Selection Notes

Select this component when 8-bit I/O expansion is required with low standby current consumption. Ensure the application utilizes I2C or SMBus protocols compatible with the 0 Hz to 400 kHz clock frequency range. Verify that the operating temperature range of -40 °C to +85 °C meets the environmental constraints of the target design.

I/o Expanders Part Context

The PCA9534 series enhances the NXP Semiconductors family of I2C-bus I/O expanders. It is identical to the PCA9554 except for the removal of internal I/O pull-up resistors, which reduces power consumption when I/Os are held LOW. The BS3 variant specifically denotes the smaller 3x3 mm HVQFN16 package option within the broader product line.

I/o Expanders Replacement Considerations

PCA9534BS is a pin-compatible alternative using the larger 4x4 mm HVQFN16 package.