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.