PCA9306DCTR

• 2-Bit bidirectional translator for SDA and SCL lines in mixed-mode I 2C Applications
• I 2C and SMBus compatible
• Less than 1.5-ns maximum propagation delay to accommodate standard-mode and fast-mode I 2C 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 resistance between input and output ports provides less signal distortion
• Open-drain I 2C I/O ports (SCL1, SDA1, SCL2, and SDA2)
• 5-V Tolerant I 2C 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
• Latch-up performance exceeds 100 mA Per JESD 78, class II
• ESD protection exceeds JESD 22
  • 2000-V Human-body model (A114-A)
  • 1000-V Charged-device model (C101)

The PCA9306 device is a dual bidirectional I 2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-V V REF1 and 1.8-V to 5.5-V V REF2.

The PCA9306 device 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.

In addition to voltage translation, the PCA9306 device can be used to isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.