NXP PCA9306DP Dual I2C Bus Voltage Level Translator, TSSOP-8

The NXP PCA9306DP is a dual bidirectional I²C-bus and SMBus voltage-level translator with an enable (EN) input, designed for mixed-mode I²C-bus applications. It operates from 1.0V to 3.6V on the Vref(1) side and 1.8V to 5.5V on the Vbias(ref)(2) side, allowing seamless voltage translations between 1V and 5V without requiring a direction pin. The low ON-state resistance (Ron) ensures minimal propagation delay, making it ideal for high-speed communication.

When EN is high, the translator switch connects SCL1 and SDA1 to SCL2 and SDA2, enabling bidirectional data flow between ports. When EN is low, the switch is off, providing a high-impedance state to isolate both sides. Unlike bus buffers, the PCA9306 delivers voltage-level translation when active but only isolates capacitance when disabled, offering flexibility in mixed-voltage systems.

Features

• 2-bit bidirectional translator for SDA and SCL lines
• Standard-mode, fast-mode, and fast-mode plus I²C-bus and SMBus compatible
• Low 3.5Ω ON-state connection between input and output ports
• High-impedance SCL1, SDA1, SCL2, and SDA2 pins when EN = low
• Lock-up free operation
• Flow-through pinout for ease of PCB trace routing
• Propagation delay: 1.5ns
• Supply voltage range: 1.2V to 3.6V
• Operating temperature: -40°C to 85°C

Specifications

The PCA9306DP comes in a TSSOP-8 package with two inputs and eight pins. It supports standard, fast, and fast-mode plus I²C-bus speeds, ensuring compatibility with a wide range of devices. The device is supplied in a compact TSSOP package, suitable for space-constrained PCB designs.

Ideal for applications in communications and networking, this translator simplifies mixed-voltage I²C-bus interfaces, providing reliable and efficient level shifting in multi-voltage systems.