UM3212

UM3212 Dual Bidirectional I2C-Bus and SMBus Voltage-Level Translator UM3212M8 MSOP8 UM3212DA DFN8 2.1×1.6 General Description The UM3212 is a dual bidirectional I2C-bus and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.0V to 3.6V (Vref(1)) and 1.8V to 5.5V(Vbias(ref)(2)). The UM3212 allows bidirectional voltage translations between 1.0V and 5V 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. The UM3212 is not a bus buffer which provides both level translation and physically isolates the capacitance to either side of the bus when both sides are connected. The UM3212 only isolates both sid...