TXB0104-Q1: VCCA, VCCB and OE power-up, Output and INPUT status

Lenny Lee

Part Number: TXB0104-Q1

Tool/software:

Hi Team,

My customer is reviewing it as below connection.

1. Any recommendation for power on sequence?

2. VCCB=3.3V always-on first, and OE 1.8V turn-on, and then 1.8V VCCA turn-on lastly. no any side effect?

3. VCCB=3.3V, 1.8V VCCA, OE pull up to 1.8VCCA condition. if VCCB is turn-off, any side effect?

It seems there's no side effect or no any leakage current as datasheet and a document of below link said, please let me have feedback for it?

BR.

Lenny Lee

0 Clemens Ladisch 15 days ago

Guru 300430 points

1. VCCA should not be higher than VCCB.

2. No.

3. When VCCB is off, a leakage current can flow into it from VCCA.

0 Lenny Lee 12 days ago in reply to Clemens Ladisch

Hi Clemens,

for the Q.3. condition. OE has to be controlled before VCCB off , not to make any leakage path?

any suggestion to avoid leakage current?

BR. Lenny.

0 Clemens Ladisch 12 days ago in reply to Lenny Lee

Guru 300430 points

There is a diode from VCCA to VCCB; OE does not affect this.

What protocol is this used for? Other translators might work better.

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