1 Features
• AEC-Q100 qualified for automotive applications
• Supports DC shifts up to ±40V
• AC Noise Rejection of 80VPP up to 5MHz
• CMTI of 1kV/μs
• Low Prop Delay (<5ns) and Ch-Ch Skew (<0.20ns)
• Greater than 250Mbps
• Low power consumption (0.8mA per channel at
1Mbps, 1.8V)
• Fully configurable dual-rail design allows each port
to operate from 1.71V to 5.5V
• 4, 2, 1 channel devices with multiple configurations
will be available
• Two device variants:
– TXG4020-Q1: 2 forward
– TXG4021-Q1: 1 forward, 1 reverse
• Supports VCC disconnect feature (I/Os are forced
into high-Z)
• Schmitt-trigger inputs allows for slow and noisy
signals
• Inputs with integrated static pull-down resistors
prevent channels from floating
• Operating temperature from –40°C to +125°C
• Latch-up performance exceeds 100mA per JESD
78, class II
– ESD protection exceeds JESD 22
– 4000V human-body model
– 500V charged-device model
• Package options provided:
– DSG (WSON-8)
– DDF (SOT-8)
– D (SOIC-8)

2 Applications
• Electric Power Steering
• Vehicle Control Unit
• Automotive Display
• Head Unit and Digital Cockpit

3 Description
The TXG402x-Q1 is a 2-bit, fixed direction, nongalvanic
based voltage and ground-level translator
that can support both logic-level shifting between
1.71V to 5.5V and ground-level shifting up to
±40V. Compared to traditional level shifters, the
TXG402x-Q1 family can solve the challenges of
voltage translation across different ground levels. The
Simplified Diagram shows a common use case where
DC shift occurs between GNDA to GNDB due to
parasitic resistance or capacitance.
VCCA is referenced to GNDA and VCCB is referenced
to GNDB. Ax pins are referenced to VCCA logic level
while Bx pins are referenced to VCCB logic levels.
Both A port and B port can accept voltages from
1.71V to 5.5V. The leakage between GNDA and
GNDB is <90nA when VCC to GND is shorted.
The TXG402x-Q1 device helps improve noise
immunity and power sequencing across different
ground domains while providing low power
consumption, latency and channel-to-channel skew. It
can supress noise levels of 80VPP up to 5MHz (Figure
7-4). This device can support multiple interfaces such
as UART, GPIO, and JTAG.