31 Oct
2010
31 Oct
'10
11:07 a.m.
On 10/31/2010 10:11 AM, Chuck Guzis wrote:
On 31 Oct 2010 at 8:28, Glen Slick wrote:
True, but it has absolutely *nothing* to do with whether a National
Semiconductor DM74LS471 uses the same programming algorithm and
electrical parameters as the SN74S471. They might, but it was not
uncommon for different vendors to have parts that did NOT program in the
same way. They often did their own designs, with different types of
fuses and materials, requiring different programming parameters.
Eric
On Sat, Oct 30, 2010 at 2:40 PM, Chuck
Guzis<cclist at sydex.com> wrote:
I have the Nat Semi DM74LS471 on the device list of my programmer, but
not the SN74S471. Any chance the programming algorithms are the same?
They probably are. Somewhere in the history of TI part numbers, they
changed some of the bipolar memories from the SN74xxx part number to
TBPxxx. I can't recall which way my parts are labeled, but they're
471s under the hood.
The
bigger problem for me would be finding a programmer for these
things. I've got a mess of SN74S471s and no way to program
them.>