1 Features

? 2-bit dual supply bidirectional translator for I3C,

I2C, SMBus, SPI applications

? Provides bidirectional voltage translation with no

direction pin

? High-impedance output Ax and Bx pins when

OE = 0 V or VCC = 0 V

? Internal 10-kΩ pull-up resistor on Ax and Bx pins

? 0.72 V to 1.98 V on both A and B ports;

VCCA ≤ VCCB

? Compatible with MIPI I3C supporting speeds up to

12.5 MHz

? VCC Isolation feature: If either VCC input is at GND,

both A and B ports are in the high-impedance state

? No power-supply sequencing required: either VCCA

or VCCB can be ramped first

? Low Ioff of 2.5 μA when either VCCA or VCCB = 0 V

? OE input can be tied directly to VCCA or controlled

by GPIO

? Latch-up performance exceeds 100 mA per JESD

78, class II

? ESD Protection exceeds JESD 22

– 4000-V Human-body model (A114-B)

– 1500-V Charged-device model (C101)

2 Applications

? Servers

? Wearables

? Personal electronics

3 Description

The TCA39416 is a 2-bit bidirectional MIPI I3C v1.1.1,

I2C, SMBus and SPI voltage-level translator with an

output enable (OE) input and rising and falling edge

accelerators. It is operational from 0.72 V to 1.98 V

on both the A-side and B-side with VCCA must be less

than VCCB for proper operation. This limitation allows

the device to interface between lower and higher logic

signal levels at any of the typical 1-V, 1.2-V and 1.8-V

supply rails.

The OE input pin is referenced to VCCA, can be tied

directly to VCCA, but it is also 1.98-V tolerant. The OE

pin can also be controlled and set to a logic low to

place all the Ax (A1, A2) and Bx (B1, B2) pins in a

high-impedance state, which significantly reduces the

quiescent current consumption.

The TCA39416 is compatible with 12.5 MHz

I3C speeds and also supports higher speed SPI

applications with two devices. It also enables

bidirectional voltage level translation for traditional

I2C-bus/SMBus applications under normal I2C and

SMBus configurations.

The TCA39416 features internal 10-kΩ pull-up

resistors on Ax and Bx that act as high-keeper and

are enabled based on respective VCC voltage when

bus is high.