Ultra-low voltage I2C translator with rise time accelerators

The TCA9416 is a 2-bit bidirectional I2C and SMBus voltage-level translator with

an output enable (OE) input and rising and falling edge accelerators. It is operational from

1.08 V to 3.6 V on both the A-side and B-side. This allows the device to interface between

lower and higher logic signal levels at any of the typical 1.2-V, 1.8-V, 2.5-V, and 3.3-V

supply rails.

The OE input pin is referenced to

VCCA, can be tied directly to

VCCA, but it is also 3.6-V tolerant.

The OE pin can also be controlled and set to a

logic low to place all the SCL and SDA pins in a

high-impedance state, which significantly reduces

the quiescent current consumption.

Under normal I2C and SMBus configurations, the TCA9416 is compatible with

standard speeds where the frequency of SCL is 100 kHz (Standard-mode), 400 kHz (Fast-mode),

or 1 MHz (Fast-mode Plus).

The TCA9416 features internal 10-kΩ pull-up

resistors on SCLA, SDAA, SCLB, and SDAB.

Additional external pull-up resistors can be added

to the bus to reduce the total pull-up resistance

and speed up rising edges.