The PCA9536DRG4 from Texas Instruments is a highly efficient, compact, and versatile I²C/SMBus I/O expander.

• Package: Small 8-pin SOIC package
• GPIO Pins: Four GPIO pins that can be individually configured as inputs or outputs
• I²C Interface: Supports both standard (100 kHz) and fast (400 kHz) modes
• I²C Devices: Supports up to eight devices on the same bus
• Power-On Reset: Internal power-on reset
• Interrupt Output: Can alert the host controller when there is a change in the input state
• Operating Voltage Range: 2.3V to 5.5V
• Standby Current: Low
• Operating Temperature Range: Extended industrial temperature range of -40°C to +85°C
• RoHS Compliant: Yes
• Lead-Free: Yes