TI PCA9306DCTR

A dual bidirectional I²C and SMBus voltage-level translator with an enable (EN) input, operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2. Allows bidirectional voltage translations between 1.2 V and 5 V without a direction pin. The low ON-state resistance (RON) of the switch allows connections with minimal propagation delay. When EN is high, the translator switch is ON, enabling bidirectional data flow between ports; when EN is low, the switch is off, and a high-impedance state exists between ports. Can be used to isolate a 400-kHz bus from a 100-kHz bus by controlling the EN pin.

• 2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode I²C Applications
• I²C and SMBus Compatible
• Less Than 1.5-ns Maximum Propagation Delay to Accommodate Standard-Mode and Fast-Mode I²C Devices and Multiple Masters
• Allows Voltage-Level Translation Between:
  • 1.2-V VREF1 and 1.8-V, 2.5-V, 3.3-V, or 5-V VREF2
  • 1.8-V VREF1 and 2.5-V, 3.3-V, or 5-V VREF2
  • 2.5-V VREF1 and 3.3-V or 5-V VREF2
  • 3.3-V VREF1 and 5-V VREF2
• 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 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
• 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)

• I2C, SMBus, PMBus, MDIO, UART, Low-Speed SDIO, GPIO, and Other Two-Signal Interfaces
• Servers
• Routers (Telecom Switching Equipment)
• Personal Computers
• Industrial Automation