Open drain comparator can pull up to 12V via 330K?

[treez]

Hello,

I've got the MCP65R46 open collector comparator pulling up to 12V with a 330K resistor.
Is this OK...?
The datasheet appears to say that 10V is the maximum?
Vdd pin is 3V3

MCP65R46 datasheet:
**broken link removed**

 

[dick_freebird]

Datasheet says no. You might escape damage by limiting
the current, or not, they don't say. If you need something
old, slow and high voltage the LM339 (quad) or its dual
version are tried & true. But your L-H prop delay will be
dismal and highly variable at that high a pullup value.

 

[treez]

The datasheet says "do not short the output of the MCP65R46 comparator above VSS+10V"

What on earth this means i have no idea.........why anyone would want to short the output of a comparator to any voltage is totally beyond my comprehension?
Nowhere in the datasheet does it say that the pullup votlage is limited to 10V.
Im not worried about L-H prop delay.

 

[IanP]

Nowhere in the datasheet does it say that the pullup votlage is limited to 10V.

Actually it does:

Pull-up Voltage VPU min=1.6 — max=10 V


The statement about not shortening something to something, although not very precise, also says about voltage limitation to 10V above Vss (or GND) ...

:wink:
IanP