TXG4021中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? 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: 2 forward

– TXG4021: 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

– 2500V human-body model

– 500V charged-device model

? Package options provided:

– DSG (WSON-8)

– DDF (SOT-8)

– D (SOIC-8)

2 Applications

? Test and Measurement

? Industrial Automation

? Appliances

? Robotics

? Avionics

3 Description

The TXG402x is a 2-bit, fixed direction, non-galvanic

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 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 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 7-5). This

device can support multiple interfaces such as UART,

GPIO, and JTAG.