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SCPS225C – AUGUST 2011 – REVISED DECEMBER 2017 TCA9509 Level-Translating I2C and SMBUS Bus Repeater
1 Features 3 Description 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
degradation of performance even during level shifting. 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 …