TCA9509 - Texas Instruments

TCA9509 Level-Translating I2C and SMBUS Bus Repeater

This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems. It can also provide bidirectional voltage-level translation (uptranslation/down-translation) between low voltages (down to 0.9 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without de.

Features

•1 Two-Channel Bidirectional Buffer
• I2C Bus and SMBus Compatible
• Operating Supply Voltage Range of 2.7 V to 5.5 V on B side
• Operating Voltage Range of 0.9 V to 5.5 V on A-Side
• Voltage-Level Translation From 0.9 V to 5.5 V and 2.7 V to 5.5 V
• Active-High Repeater-Enable Input
• Requires No External Pullup Resistors on Lower-Voltage Port-A
• Open-Drain I2C I/O
• 5.5-V Tolerant I2C and Enable Input Support Mixed-Mode Signal Operation
• Lockup-Free Operation
• Accommodates Standard Mode and Fast Mode I2C Devices and Multiple Masters
• Supports Arbitration and Clock Stretching Across Repea.