GXA9617

1 Features 
• Two-channel bidirectional I2C buffer 
• Support for standard mode (100kHz), 
fast mode (400kHz) and fast mode+ (1MHz) 
• Supply voltage range of 0.8V to 5.5V on A-side 
• Supply voltage range of 2.2V to 5.5V on B-side 
• Voltage-level translation from 0.8V to 5.5V and 2.2V to 5.5V 
• Footprint and function replacement for xCA9617 and xCA9517 
• Active-high repeater-enable input 
• Open-drain I2C I/O 
• Lockup-free operation 
• Support for clock stretching and multiple 
controller arbitration across the device 
• Package information: 

2 Applications 
• Servers 
• Routers 
• Industrial equipment 
• Products with many I2C targets and/or long PCB traces 

3 Description 
The GXA9617 is a dual bidirectional buffer intended for I2C bus and SMBus systems. The device provides bidirectional voltage-level translation (up-translation and down-translation) between low voltages (down to 0.8V) and higher voltages (2.2V to 5.5V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting. 
The GXA9617 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, allowing two buses of 550pF to be connected in an I2C application. This device can also be used to separate two halves of a bus for voltage and capacitance. 

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