The TCA9617A is a BiCMOS dual bidirectional buffer intended for I2C bus and SMBus systems. It can provide bidirectional voltage-level translation (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (2.2 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.
The TCA9617A buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, allowing two buses of 550-pF or greater bus capacitance to be connected in an I2C application. This device can also be used to isolate two halves of a bus for voltage and capacitance.
Two-Channel Bidirectional I2C Buffer
Support for Standard Mode, Fast Mode (400 kHz), and Fast Mode+ (1 Mhz) I2C Operation
Operating Supply Voltage Range of 0.8 V to 5.5 V on A-Side
Operating Supply Voltage Range of 2.2 V to 5.5 V on B-Side
Voltage-Level Translation From 0.8 V to 5.5 V and 2.2 V to 5.5 V
Footprint and Function Replacement for TCA9517
Active-High Repeater-Enable Input
Open-Drain I2C I/O
5.5-V Tolerant I2C and Enable Input Support
Mixed-Mode Signal Operation
Lockup-Free Operation
Support for Clock Stretching and Multiple Master Arbitration Across The Device
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
