[sdiy] 4006 on evilBay

[Tom Wiltshire]

On 12 Feb 2011, at 11:55, Colin f wrote:

> 
>> I don't think the open drain outputs count as standard GPIO. 
>> If you look at the datasheet for the PIC 16F627A (just an 
>> example - I know this chip has an OD output) the diagram (fig 
>> 5-4) for the RA4 port pin shows no protection diode to Vdd, 
>> only Vss.
> 
> Datasheet shows Vmax at RA4 of 8.5v (page 140)

Well spotted. That's better than Vdd+0.7, but still not that great. Pity. Would have been nice to be able to pull it up to +15V.

It has the little get-out-clause star by it though: "These parameters are characterized but not tested". Which probably means they've no idea either. Maybe it blows up at 8.5V. Maybe it blows up at 6.5V. Maybe it's fine with +15V. Maybe...poof!

T.