Voltage Level Translator 8-Pin SSOP T/R

The PCA9306 is a dual bidirectional I2C and SMBus voltage-level translator, with an enable (EN) input, is operational from 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2. The PCA9306 allows bidirectional voltage translations between 1.2 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 PCA9306 can be used to isolate a 400-kHz bus from a 100-kHz 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 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-O 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)

APPLICATIONS

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