TCA9548APWR 8-Channel I²C Bus Multiplexer – 24-Pin TSSOP

The TCA9548APWR is an 8-channel I²C/SMBus multiplexer designed to simplify communication with multiple I²C devices that share the same slave address. Operating from 1.65V to 5.5V, it allows a single I²C master to communicate with up to eight independent downstream I²C buses. With low ON-resistance, hot-insertion support, active-low reset, and 5V-tolerant inputs, it is ideal for embedded systems, sensor networks, servers, routers, industrial automation, and IoT applications.

Key Features -

• 8-channel bidirectional I²C bus multiplexer

• Compatible with I²C and SMBus interfaces

• Wide operating voltage range from 1.65V to 5.5V

• Supports Standard Mode and Fast Mode I²C (up to 400kHz)

• Active-low RESET input for bus recovery

• All channels deselected during power-up

• Low ON-resistance (Ron) switches for minimal signal loss

• No output glitches during power-up

• Supports hot insertion of downstream devices

• Low standby current consumption

• 5V-tolerant inputs for flexible interfacing

• Green, RoHS-compliant device with no antimony (Sb) or bromine (Br) flame retardants

Specifications -

• Product Type - I²C Bus Multiplexer / Switch

• Part Number - TCA9548APWR

• Communication Interface - I²C / SMBus

• Number of Channels - 8

• Supply Voltage (VCC) - 1.65V to 5.5V

• Maximum I²C Clock Frequency - 400kHz

• Input Voltage Tolerance - 5V Tolerant

• RESET Input - Active Low

• Package Type - TSSOP-24

• Number of Pins - 24

• Mounting Type - Surface Mount (SMD/SMT)

• Standby Current - Low Power Operation

• Latch-Up Immunity - Exceeds 100mA per JESD78 Class II

Applications -

• Expanding I²C buses in embedded systems

• Connecting multiple identical I²C sensors

• Raspberry Pi and Arduino projects

• ESP32 and STM32 development boards

• Industrial automation systems

• Servers and networking equipment

• IoT sensor hubs

• Data acquisition systems

• Medical instrumentation

• Robotics and automation controllers