Hi team,
Recently, many customers use TXS0108E or TXS0104. The common issues are as below：
1. The output signal is pulled down.
2. There is no output signal.
The customer's input signal is fine.
Case 1. IC
number: TXS0104
VCCA is 3.3V. VCCB is 5V. A port is the input channel. B port is the output channel. The data rate is 10K.
The output is no-load. The input signal is fine. The schematic is the figure 1. The output waveform is the figure 2.
The issue is when the input signal is the low level, the output level cannot be pulled down with a lot of noise.
Figure 1
Figure 2
Case 2.
IC number: TXS0108E
A port is 1.8V. B port is 3.3V. A port is the input channel. B port is the output channel.
When the input signal is input to A port, there is no data for the B port and OE pin is pulled down to 0.2V.
Please check the figure 3 for the schematic.
Figure 3
Would you explain the reasons for the case 1 and case 2?
Best Wishes,
Mickey Zhang
Asia Customer Support Center
Texas Instruments
