TCA39306DCURQ1

The TCA39306-Q1 is a dual bidirectional voltage-level translator compatible with I²C, SMBus, and I³C with an enable (EN) input, and is operational from 0.9–V to 3.3V VREF1 and 1.8-V to 5.5-V VREF2. The device allows bidirectional voltage translations between 0.85 V and 5 V, without the use of a direction pin. The low ON-state resistance (RON) of the switch allows connections to be made with minimal propagation delay. When EN is high, the translator switch is ON, and the SCL1 and SDA1 I/O are connected to the SCL2 and SDA2 I/O, respectively, allowing bidirectional data flow between ports. When EN is low, the translator switch is off, and a high-impedance state exists between ports. In addition to voltage translation, the TCA39306-Q1 can be used to isolate a higher speed bus from a lower speed bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.

Applications

• I2C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other two-signal interfaces
• Servers
• Routers (telecom switching equipment)
• Personal computers
• Industrial automation

Key features

• Qualified for automotive applications
• Functional Safety-Capable Documentation available to aid in functional safety system design
• 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I²C applications
• Standard-mode, fast-mode, and fast-mode plus I²C and SMBus compatible
• I³C compatible (12.5 MHz supported)
• Allows voltage-level translation between 0.9 - VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
• Provides bidirectional voltage translation with no direction Pin
• Low ON-state resistance between input and output ports provides less signal distortion
• Open-drain I²C I/O ports (SCL1, SDA1, SCL2, and SDA2)
• 5-V Tolerant I²C I/O ports to support mixed-mode signal operation
• High-impedance SCL1, SDA1, SCL2, and SDA2 pins for EN = Low
• Lockup-free operation for isolation when EN = Low
• Flow-through pinout for ease of printed-circuit board trace routing
• ESD Protection Exceeds JESD 22
• 2000-V human-body model (A114-A)
• 1000-V charged-device model (C101)