28 Apr
2012
28 Apr
'12
1:40 p.m.
On 2012 Apr 28, at 11:57 AM, Tony Duell wrote:
A not unusual I/E curve. It's not incompatible.
On 2012 Apr 28, at 11:34 AM, Tony Duell wrote:
On 2012 Apr
27, at 11:39 AM, Tony Duell wrote:
The datasheet shows only a single connection for Vff, not a floating
connection.
AC is required by the WOM for two reasons:
- Vff is used in a critical area of the chip. DC used here would
[...]
> [1]
Vff = 6.3V nearly always implies an indrectly-heated cathode,
> so the
> polarity and whether it's AC or DC make very little difference.
The datasheet specifies AC.
Yes, but AFAIK it doesn't specify if this supply has to be floating,
centre-tapped to ground, or whatever. That implies to me an isolated
filament heating a separate cathode. So I can't see why AC is
essential. - The AC is also used as a clock to
periodically empty the WOM
bit-
[...]
I would think the published Iff - Vff curve i nthe data shert is
incompatible with either of these uses.
Yes, but as there;'s only 1 Vff pin (presumably referenced to
ground),
Which I pointed out, and negates your presumptions of an isolated
filament and DC compatibility.
The datasheet specifies AC.
(Why do I bother)