Part Number: LMK00105
The LMK00105 features two independent banks of output clocks, but only one output enable pin. Would it be possible to control the clock outputs by connecting independent load-switches to the corresponding VDDO?
There's a statement on page 9 of the datasheet that sort of addresses this question, but the reasons behind why aren't exactly clear.
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 Timothy T:
Appreciate the timely response. Looking forward the response from the other engineer as to why this won't work.
In reply to Donald Schelle90399:
In reply to Shawn Han:
I will confirm if this is doable with the IC designer. Thanks for your patience.
In reply to Alan O:
When VDDO is disconnected via a load switch, what is the state of the outputs? High impedance?
The LVCMOS output supply goes to 0V, along with the gate voltages, etc. So effectively the impedance at 0V will be very high. If you were to curve trace the output in this condition though, you will see a diode starting to turn on once you start going above or below ground, so the high impedance is only right around when the output is at 0V. If the output is pulled up with an external resistive termination in this mode, it will clamp at roughly 1V or so.
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.