1 Features

• AEC-Q100 qualified for automotive applications

• Supports DC ground shifts up to 40V

• AC Noise Rejection of 80VPP up to 5MHz

• CMTI of 1kV/μs

• Low Prop Delay (<5ns) and Ch-Ch Skew (0.35ns)

• Greater than 250Mbps

• Low power consumption (0.65mA 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 available

• Two device variants:

– TXG4041-Q1: 3 forward, 1 reverse

– TXG4042-Q1: 2 forward, 2 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:

– RUC (X2QFN-14)

– DYY (SOT-14)

– DBQ (QSOP-16)

2 Applications

• Electric Power Steering

• Vehicle Control Unit

• Automotive Display

• Head Unit and Digital Cockpit

3 Description

The TXG404x-Q1 is a 4-bit, fixed direction, nongalvanic

based voltage and ground-level translator

that supports both logic-level shifting between 1.71V

to 5.5V and ground-level shifting up to ±40V.

Compared to traditional level shifters, the TXG404x-

Q1 family solves 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 accept voltages from 1.71V

to 5.5V. This device includes two enable pins that

can place the respective outputs in a high-impedance

state when the OE pin is connected to GND or left

floating. In the event of input power or signal loss,

the output is default low when OE is High (refer to

Table 7-1). The leakage between GNDA and GNDB is

<45nA when VCC to GND is shorted.

The TXG404x-Q1 device helps improve noise

immunity and power sequencing across different

ground domains while providing low power

consumption, latency, and channel-to-channel skew.

The device supresses noise levels of 80VPP up to

5MHz (Figure 7-5). TXG404x-Q1 can support multiple

interfaces such as SPI, UART, GPIO, and I2S.