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: SN74CBTLV1G125
I have a question regarding this part,
The datasheet specifies a VinHighMin of 2V when supplied at 3V3.
We assume the A to B connection are 2 FET switches so it should not care about high or low as it is just an analogue connection. The VIN levels should only be applicable on the OEn input, but the datasheet is not clear on that.
Are these assumptions correct and can we connect an LVCMOS18 signal to the A-port of the device?
The device will be supplied by 3V3, OEn will be tied to GND.
Thanks and regards.
Are you referring to VIH and VIL in the Recommended operating conditions?
The OE# pin threshold voltage range is defined by the VIH and VIL specs in the datasheet. It determines if the switch turns on or off if the control signal is low or high.
Can you provide some more details/block diagram how you are connecting an LVCMOS18 signal using the SN74CBTLV1G125? What is the signal voltage for LVCMOS18 you are trying to pass?
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.
This device is an analog switch; the A and B pins indeed allow any voltage.
In reply to Saminah C:
Here are the answers to your questions:
So the thresholds don’t apply to the A and B pins?
Can you provide some more details/block diagram how you are connecting an LVCMOS18 signal using the SN74CBTLV1G125?
It’s a point-to-point connection from LVCMOS18 driver to SN74CBTLV1G125 port A and also from SN74CBTLV1G125 port B to a LVCMOS18 receiver. No ODs or PUs or PDs.
What is the signal voltage for LVCMOS18 you are trying to pass?
Voh = 1.45V
Vol = 0.45V
Vih = 1.2V
Vil = 0.65V
Can you please answer my questions, I replied back with the answers that you asked for.
In reply to Azza Boutour:
Thank you for providing the details.
Your understanding is correct. The VIH and VIL specs apply to logic pin OE and not to A or B. A and B are the I/O pins.
The input voltage for the SN74CBTLV1G125 is 0V - 3.6V.
Your signal voltage is within this range so the SN74CBTLV1G125 looks like a good fit.
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. 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.