PCA9306DQER

1FEATURES 

• 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 Masters

• Allows Voltage-Level Translator 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 Connection 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 

• 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)

DESCRIPTION/ORDERING INFORMATION 

This dual bidirectional I 2C 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 PCA9306DQER 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 I 2C applications, the bus capacitance limit of 400 pF restricts the number of devices and bus length. Using the PCA9306DQER enables the system designer to isolate two halves of a bus; thus, more I 2C devices or longer trace length can be accommodated. 

Feature