Other Parts Discussed in Thread: TMUX1575
Hi,
I've been working on a project using the TS3A5018, and have noticed what appears to be a discrepancy in the datasheet.
One thing I have been wondering is if you can have higher voltages on the COM, NC, and NO lines than V+. Specifically, the question I would like to answer is "At V+ = 1.8V, can you have Vcom, Vnc, or Vno = 3.3V?
The datasheet has separate information for Electrical Characteristics for 3.3V, 2.5V, and 1.8V. Specifically, I am looking at the Vcom, Vno, Vnc (Analog Signal Range), and Vih (Input logic high).
The Analog Signal Range for each operating voltage is always given as 0V - V+. However, the Input Logic High range is different for each case, given, as presented in the datasheet, below:
| Operating voltage / V | Vih Signal Range / V |
| 3.3 | 2 - V+ |
| 2.5 | 1.7 - V+ |
| 1.8 | 1 - 3.6 |
The value for 1.8V seems to be contradictory to the Analog Signal Range. The Analog Signal Range only reaching V+ implies that Vcom, Vnc, and Vno must be kept at or below V+, whereas the Vih range implies that these signals should work up to 3.6V.
It also seems unusual that the Vih range at 2.5V is V+ (ie 2.5V), but at 1.8V increases to 3.6V.
Can you confirm which of these is correct?
Thanks,
Luke
