TXG8041中文资料德州仪器数据手册PDF规格书

1 Features

• Supports DC shifts up to ±80V

• AC Noise Rejection of 140VPP up to 1MHz

• CMTI of 250V/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

• 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

• Small SOT-24 (DYY-14) package

2 Applications

• Aircraft cockpit display

• Flight control unit

• Radar

• Sonar

• Electronic warfare

• Seeker front end

3 Description

The TXG8041-EP is a 4-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 ±80V.

Compared to traditional level shifters, the TXG8041-

EP 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. This device includes two enable

pins that can place the respective outputs in a highimpedance

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 TXG8041-EP helps improve noise immunity and

power sequencing across different ground domains,

while providing low power consumption, latency and

channel-to-channel skew. TXG8041-EP can supress

noise levels of 160VPP up to 1MHz (Figure 7-3). This

device can support multiple interfaces such as SPI,

UART, GPIO, and I2S.