The PCA9306DCUT device is a dual bidirectional I2C and SMBusvoltage-level translator with an enable (EN) input, and is operational from 1.2-V to 3.3-VVREF1 and 1.8-V to 5.5-V VREF2.
The PCA9306DCUT device 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 theswitch allows connections to be made with minimal propagation delay. When EN is high, thetranslator 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 switchis off, and a high-impedance state exists between ports.
In addition to voltage translation, the PCA9306DCUT device can be used to isolate a 400-kHzbus from a 100-kHz bus by controlling the EN pin to disconnect theslower bus during fast-mode communication.
Feature
2-Bit bidirectional translator for SDA and SCL lines in mixed-modeI2C Applications
I2C and SMBus Compatible
Less than 1.5-ns Maximum Propagation Delay to Accommodate Standard-mode andFast-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-VVREF2
2.5-V VREF1 and 3.3-V or 5-VVREF2
3.3-V VREF1 and 5-V VREF2
Provides Bidirectional Voltage Translation with no Direction Pin
Low 3.5-Ω ON-state ResistanceBetween Input and Output Ports Provides Less SignalDistortion
Open-drain I2C I/O ports (SCL1, SDA1, SCL2, andSDA2)
5-V Tolerant I2C I/O Ports to Support Mixed-mode SignalOperation
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
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