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1Pc TCA9548A I2C Multiplexer Module 8-Channel I2C Switch Board with Reset Function
- 8-Channel TCA9548A I2C Multiplexer Module: This TCA9548A expansion module provides 8 independent I2C channels, allowing a single I2C bus to communicate with multiple downstream devices. Each channel can be selected individually or in combination through programmable control registers.; Solves I2C Address Conflict Issues: Ideal for connecting multiple I2C devices with the same address, this module lets up to 8 identical-address devices operate on one I2C port. With selectable addresses from 0x70 to 0x77, up to 8 multiplexers can be used on one bus for expanded multi-device projects.; Wide Voltage and Level Shifting Support Operating from 1.65V to 5.5V, the module supports mixed-voltage I2C systems. With proper pull-up resistors on each channel, it can help 1.8V, 2.5V, 3.3V, and 5V I2C devices communicate in the same system without additional level-shifting circuits.; Reset Function and Reliable Bus Control: The low-active RESET input allows the system controller to reset the TCA9548A during timeout or improper operation without powering down the device. Power-on reset deselects all channels and initializes the I2C/SMBus state machine for stable startup.; Compact Module for Embedded Development: Compatible with I2C bus and SMBus, supporting up to 400kHz clock frequency, hot-plugging, low standby current, and no power-up glitch pulses. With a compact 31.5mm x 21.4mm board and M3 mounting holes.
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The TCA9548A I2C multiplexer expansion module is designed to expand a single I2C bus into 8 independent I2C channels, making it an ideal solution for connecting multiple I2C devices with the same address. Each channel is controlled through the I2C bus, allowing the system controller to select any individual SCn/SDn channel or a combination of channels according to the programmable control register. The default I2C address is 0x70, and it can be configured within the range of 0x70 to 0x77. In theory, up to 8 TCA9548A multiplexers can be used on the same I2C bus, and each multiplexer can connect up to 8 devices with the same address, allowing up to 64 same-address I2C devices to operate on a single I2C port.
Product
Expansion Module Function: 8-channel I2C switch
Main Chip: TCA9548A
Operating Voltage: 1.65V 5.5V
IC Clock Frequency: 0400 kHz
Default I2C Address: 0x70
Configurable Address Range: 0x700x77 Number of
I2C Channels: 8 bidirectional I2C switch channels
Compatible Bus: I2C bus and
SMBus Reset Function: Low-active /RESET input
Voltage Level Support: 1.8V, 2.5V, 3.3V, and 5V bus voltages
I/O Pin Rating: All I/O pins are rated for 5V
Operating Temperature Range: -40°C to 85°C
Board Dimensions: 31.5 mm × 21.4 mm
Mounting Holes: Two M3 mounting holes How It Works The TCA9548A works as an I2C-controlled switch. The main controller communicates with the module using the selected module address, typically 0x70 by default. A...
Product
Specifications
Product Name: TCA9548A MultiplexerExpansion Module Function: 8-channel I2C switch
Main Chip: TCA9548A
Operating Voltage: 1.65V 5.5V
IC Clock Frequency: 0400 kHz
Default I2C Address: 0x70
Configurable Address Range: 0x700x77 Number of
I2C Channels: 8 bidirectional I2C switch channels
Compatible Bus: I2C bus and
SMBus Reset Function: Low-active /RESET input
Voltage Level Support: 1.8V, 2.5V, 3.3V, and 5V bus voltages
I/O Pin Rating: All I/O pins are rated for 5V
Operating Temperature Range: -40°C to 85°C
Board Dimensions: 31.5 mm × 21.4 mm
Mounting Holes: Two M3 mounting holes How It Works The TCA9548A works as an I2C-controlled switch. The main controller communicates with the module using the selected module address, typically 0x70 by default. A...
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