PCA9536TK,118

I/o Expanders Overview

The PCA9536TK,118 is an 8-pin CMOS device providing 4 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus/SMBus applications. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies from 0 Hz to 400 kHz. The device features 5 V tolerant I/Os, low standby current, and noise filters on SCL/SDA inputs. It includes an internal power-on reset, polarity inversion register, and defaults to 4 inputs with 100 kΩ internal pull-up resistors upon reset. The component is housed in an HVSON8 package.

I/o Expanders Feature Summary

• Provides 4-bit I2C-bus GPIO expansion with configurable input or output directions via configuration registers.
• Features 5 V tolerant I/Os allowing operation across a wide supply voltage range of 2.3 V to 5.5 V.
• Includes internal power-on reset and noise filters on serial clock and data lines to ensure stable initialization and signal integrity.

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the specific ordering suffix

I/o Expanders Selection Notes

Select this part when a compact, leadless surface-mount solution is required for I2C-based GPIO expansion. The HVSON8 package offers a small footprint suitable for space-constrained designs. Ensure the system design accommodates the fixed I2C address limitation, as only one device can exist on the same bus segment without address shifting mechanisms.

I/o Expanders Part Context

The PCA9536 series enhances the NXP Semiconductors family of I2C-bus I/O expanders. While the base model PCA9536 is available in SO8 and TSSOP8 packages, the PCA9536TK variant specifically utilizes the HVSON8 package. This thermal enhanced very thin small outline package provides no leads with 8 terminals, measuring 3 x 3 x 0.85 mm.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9536D,118 and PCA9536DP,118. These alternatives offer identical electrical functionality but differ in packaging, utilizing SO8 and TSSOP8 formats respectively instead of the HVSON8 package found in the PCA9536TK,118.