HLF8574T – 8-Bit I²C/SMBus I/O Expander with Interrupts (SOP16W) 8-Bit Remote I/O Expander | I²C/SMBus Interface | 2.5 V–6 V | –40 °C to +85 °C | Wide SOP16 Package

The HLF8574T (SOP16W) is an 8-bit I²C/SMBus I/O expander that allows easy extension of microcontroller I/O capabilities using a simple two-wire serial interface. It provides 8 quasi-bidirectional input/output pins, each capable of generating an interrupt output when input changes are detected. Designed for 2.5 V–6 V operation, it offers low power consumption and wide compatibility for embedded and industrial systems.

Key Features:

• Function: 8-Bit I²C/SMBus I/O Expander with Interrupt

• Operating Voltage: 2.5 V – 6 V

• I/O Lines: 8 (configurable as input or output)

• Interface: I²C/SMBus Compatible

• Interrupt Output: Active-Low (INT)

• Operating Temperature: –40 °C to +85 °C

• Package Type: SOP16W (Wide Small Outline Package)

• Mounting Type: Surface-Mount

• Low Standby Current

• Supports Multiple Device Addressing

• Hot-Swap I²C Bus Compatibility

Applications:

• Microcontroller and MCU Port Expansion

• LCD or Keypad Interfaces

• Industrial Control Systems

• I/O Expansion in Embedded Boards

• Consumer and Smart Home Devices