PCA9539D,118

I/o Expanders Overview

The PCA9539D,118 is a 24-pin CMOS device providing 16 bits of General Purpose parallel Input/Output (GPIO) expansion with interrupt and reset for I2C-bus/SMBus applications. It operates within an operating power supply voltage range of 2.3 V to 5.5 V and supports 5 V tolerant I/Os. The device features an active LOW interrupt output and an active LOW reset input. It includes a polarity inversion register and noise filters on SCL/SDA inputs. The clock frequency ranges from 0 Hz to 400 kHz. ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101. Latch-up testing exceeds 100 mA per JEDEC Standard JESD78. The package is SO24 plastic small outline with a body width of 7.5 mm.

I/o Expanders Feature Summary

• Provides 16-bit I2C-bus GPIO expansion with dedicated interrupt and reset capabilities.
• Features an open-drain active LOW interrupt output that activates when any input state differs from its corresponding input port register state.
• Includes configuration registers allowing individual I/O pins to be set as inputs or outputs, defaulting to inputs at reset.
• Contains a polarity inversion register to invert the polarity of read register data for active HIGH or active LOW operation.

I/o Expanders Applications

• ACPI power switches
• Sensors and push buttons
• LED indicators and fans

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',118' corresponds to the Reel 13” Q1/T1 packing method with a minimum order quantity of 1000 units in the SO24 package. Confirm the temperature range is T amb = -40 °C to +85 °C. Ensure the datasheet revision matches the required specifications for your design implementation.

I/o Expanders Selection Notes

Select this component when 16 additional I/O lines are required via I2C communication. It is suitable for systems needing hardware interrupt notifications for input changes without continuous polling. Consider the 2.3 V to 5.5 V supply range and 5 V tolerance for compatibility with various logic levels. Verify if the internal pull-up resistor removal compared to similar models like the PCA9555 meets your power consumption requirements.

I/o Expanders Part Context

The PCA9539 series enhances the NXP Semiconductors family of I2C-bus I/O expanders. It is identical to the PCA9555 except for the removal of internal I/O pull-up resistors, replacement of the A2 address pin with a RESET pin, and a different address range. This design reduces power consumption when I/Os are held LOW.

I/o Expanders Replacement Considerations

The PCA9539R offers similar functionality but resets only the device state machine while keeping general-purpose registers unchanged upon hardware reset. The PCA9555 includes internal I/O pull-up resistors and uses an A2 pin instead of RESET. Verify functional equivalence regarding reset behavior and address mapping before substitution.