TXG104X中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? Supports DC shifts up to ±10V

? AC Noise Rejection of 20VPP up to 45MHz

? 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 with multiple configurations

will be available

? Two device variants:

– TXG1041: 3 forward, 1 reverse

– TXG1042: 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

? Test and Measurement

? Factory Automation

? Appliances

? Electric Power Steering

? Vehicle Control Unit

? Automotive Display

? Head Unit and Digital Cockpit

3 Description

The TXG104x is a 4-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 ±10V. Compared

to traditional level shifters, the TXG104x family can

solve the challenges of voltage translation across

different ground levels. The Figure 1-1 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 <30nA when VCC to GND is shorted.

The TXG104x 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 20VPP up to 45MHz (Figure 7-4). This

device can support multiple interfaces such as SPI,

UART, GPIO, and I2S.