Whats the difference in these 2732s?

[dthrock]

The are all 21v, but whats the -20 -25 or -45 signify?


"IC,EPROM,2732A-20,VP:21V"
Jameco #40109
Mfg Ref #2732A-20
6.49 USD

"IC,EPROM,2732A-25,Vp:21V"
Jameco #40125
Mfg Ref #2732A-25
4.99 USD

"IC,EPROM,2732A-45,Vp:21V"
Jameco #40133
Mfg Ref #2732A-45
4.49 USD

 

[TurboDave]

That signifies the access speed, read in nano-seconds.

the lower the number the faster the chip.
45's will work, although I prefer something a little quicker. No big deal.

 

[Scott231]

IMO, getting excited about the nanoseconds rating is getting way too anal about a chip. If you buy 100 at a time you should get a discount.

 

[terryk]

Not that it matters, but the speeds are in 10's of nanoseconds.

25's are 250nS, 45's are 450nS.