DUAL BIDIRECTIONAL I²C BUS AND SMBUS VOLTAGE-LEVEL TRANSLATOR

DESCRIPTION

The UTC UCA9306B device is a dual bidirectional I²C and SMBus

voltage-level translator between 1.2 V and 5 V, and is operational from

1.2 V to 3.3 V VREF1 and 1.8 V to 5.5 V VREF2.

The UTC UCA9306B device allows bidirectional voltage translations

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. With an enable (EN) input. 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.

FEATURES

* 2-Bit Bidirectional Translator for SDA and SCL Lines in Mixed-Mode

I²C Applications

* Open-Drain I²C I/O Ports(SCL1,SDA1,SCL2,and SDA2)

* Provides Bidirectional Voltage Translation With No Direction Pin

* High-Impedance SCL1,SDA1,SCL2,and SDA2 Pins for EN=Low

* 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

* 5-V Tolerant I2C I/O Ports to Support Mixed-Mode Signal Operation

* Green & Pb Free