GXA546

1 Basic Performance
• Compatible with SMBus and I2C communication protocols
• Supports bus communication frequency of 0~1MHz
• Supports 4-channel bidirectional data transmission
• Equipped with a low effective reset pin RESET
• Has 3 slave address selection pins
• Allow cross voltage domain data transmission
• Low on resistance, low idle current
• Power supply voltage: 1.65V~5.5V
• Supports hot plugging of devices
• Packageinformation:

2 Application Scenarios
• Server
• Router
•I2C devices with slave address conflicts

3. Chip Overview
GXA546 is a 4-channel bidirectional data transmission switch chip controlled by I2C bus. The upstream host selects one or more downstream slaves through the SCL and SDA pins of the chip and performs specified data transmission. GXA546 supports selecting any combination of downstream channel slaves.  
GXA546 provides a low effective reset pin RESET. If the I2C bus of a downstream slave is locked, the RESET pin can be pulled low to reset GXA546, so as not to select the downstream slave and release the locked I2C bus.  
GXA546 allows upstream hosts and downstream slaves to perform cross voltage domain data transmission. At this point, the power supply voltage VCC of GXA546 limits the minimum voltage VPASS allowed for upstream and downstream transmission. This function enables data exchange between upstream and downstream devices in the voltage domains of 1.8V, 3.3V, and 5.0V without the need for additional protection. When using this function, it is necessary to ensure that the I2C buses of each upstream and downstream channel are connected to their respective power supply voltages through pull-up resistors RP. The withstand voltage value of all pins of GXA546 is 5.5V

Ordering Information

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