This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: SN74CB3Q3257
My customer tends to adopt SN74CB3Q3257 for EMMC5.1 scenario which is bidirectional 400MHz. Please help with below questions.
1.Is SN74CB3Q3257 ok for this scenario?
2. Customer needs to cascade 2 pieces SN74CB3Q3257 for this scenario, is it ok?
The SN74CB3Q3257 is a bi-directional switch which will support signals up to 500MHz. If you cascade these devices your signal will occur the parasitic on state series resistance and on state parallel capacitance each stage it passes through the switch. The SN74CB3Q3257 has about ~3dB loss at 400MHz and if you place two of them in series you will have ~6dB loss due to the switch parasitic. You will need to calculate the signal integrity your system can withstand including the transmitter, receiver, switch losses, trace and layout losses, etc. to fully understand if your system will handle these losses.
Why do you need to cascade the switches? Do you have a diagram? maybe there is a different part that can give you the same function.
Have you looked at our new TMUX136 device? It will not have much loss at 400MHz.
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Adam Torma:
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.