Dear E2E community,
My customer is facing an inconsistent output signal on our TXB0106.
VCCA=2 to 3V (2x AA batteries)
The SPI is coming from a µp
The UART is coming from a push-pull output
VCCB=3V
The SPI is connected to a flash
The UART is connected to a push pull
The SPI transmission works well.
The UART has got the following behavior (every time), on the pin 11-B5 (CON_TX), when a square signal is applied on pin 6-A5 (BUF_TX)
For information, the power up sequence is:
- Vcca
- OE = 0
- Vccb
- wait 100ms
- OE = 1
- wait 100ms
- UART signal applied
Schematic used:
Do you have any comments on how to diagnose this issue?
Regards,