Other Parts Discussed in Thread: TXB0108,
Hello TI People,
I'm evaluating the TXS0108E and TXB0108 and when in a standby mode the TXB draws approximately 500uA more current than the TXS. Is this correct or do I have a broken chip?
Thanks
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Hey Angela,
This behaviour is actually to be expected from these devices. The TXS has two internal 10k pullups on it that will typically draw current when not translating. The TXB series of parts have buffers in them and as a result don't have these internal pull ups which makes them not need to draw that "standby" current as you call it. I have actually seen someone with this issue before and this forum post should help you out.
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Best Regards,
Nick
Angela,
The reason for this is that the protocols the two chips were designed for are different and need to meet different needs. You can find more information about this in the documents that support the two architectures of TXB and TXS. These documents have everything that you'll want to know I'd suspect.
If this answers your question please verify the solution below by hitting the green verification button below! If you have any additional questions on this topic feel free to send them my way. If they are about other topics please post them to a new thread for better organization of our data.
Best Regards,
Nick