• AEC-Q100 qualified for automotive applications
  • Temperature grade 2: –40°C to 105°C, T_A
  • HBM ESD classification level H2
  • CDM ESD classification level C4B
• 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I²C applications
• Compatible with I²C and SMBus
• Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I²C devices and multiple controllers
• Allows voltage-level translation between
  • 1.2-V V_REF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V V_REF2
  • 1.8-V V_REF1 and 2.5-V, 3.3-V, or 5-V V_REF2
  • 2.5-V V_REF1 and 3.3-V, or 5-V V_REF2
  • 3.3-V V_REF1 and 5-V V_REF2
• Provides bidirectional voltage translation with no direction pin
• Low 3.5-Ω ON-state connection 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
• Lock-up-free operation for isolation when EN = Low
• Flow-through pinout for ease of printed-circuit board trace routing
• Latch-up performance exceeds 100 mA Per JESD 78, Class II
• ESD protection exceeds JESD 22
  • 2000-V Human-body model (A114-A)
  • 200-V Machine model (A115-A)
  • 1000-V Charged-device model (C101)

• I²C, SMBus, PMBus, MDIO, UART, low-speed SDIO, GPIO, and other two-signal interfaces
• Automotive head units
• Automotive instrument clusters
• Automotive driver assistance cameras

This dual bidirectional I²C and SMBus voltage-level translator, with an enable (EN) input, is operational from 1.2-V to 3.3-V V_REF1 and 1.8-V to 5.5-V V_REF2.

The PCA9306-Q1 allows bidirectional voltage translations between 1.2 V and 5 V, without the use of a direction pin. The low ON-state resistance (r_on) 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.