[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [N8VEM-S100:6760] Re: CCS 2810 CPU Rom
Neil -
The TMS2716 is not the same, it is a three voltage part like the 2708.
See: http://www.jrok.com/datasheet/TMS2716.pdf
The Texas Instrument equivalent of the other 2716 parts is the TMS2516
See: http://www.jrok.com/datasheet/TMS2516.pdf
Most 2716's that aren't marked for speed are actually 450ns parts.
The NS27C16 is also a 25v VPP part.
Also several recent programmers that claim to program 2716's seem to use
a VPP of 21v rather than 25v and won't program well (or at all) - or
can't supply the 30ma required for 25vpp. You could always consider
2816 EEPROM's.
- Gary
On 4/17/2015 12:05 PM, nbreeden wrote:
Do a search on the web for the particular part; most earlier 2716s
program with VPP=25V 50ms.
I'm pretty sure a TMS2716 will program with the same settings as the
NSC2716.
You will see later 2716's that programmed at VPP=21V, and later ones
that programmed at VPP=12V; in my experience the VPP=12V ones have an
indication on the package like 'VPP=12'
You also need to be concerned with speed; a 400ns part such as the
early Intel 2716 were 400ns and didn't have a speed indicated in the
markings. -35 tends to be 350ns, -20 200ns etc.
There are also CMOS variants of EPROMs am NS2716 is an NMOS part; the
NS27C16 is the CMOS equivalent; be careful if you go looking for
datasheets as there can be programming differences between.
I have a ton of TMS2716s, NS2716s, STG, Intel etc. Overall they are
all pretty interchangeable for programming.