LE> OTP EPROM (One-Time-Programming) for sure. It's a normal EPROM but it
LE> is in a plastic case with no window so can't be erased. Very commonly
LE> used in modern equipment, for some weird reason, perhaps they're cheaper.

RS> Aint no perhaps about its, significantly cheaper.

LE> Why significantly cheaper ?

Basically because the packaging is much simpler when you dont have
to fart around with the quartz window for a real erasable eprom.
The OTP is just the massive volume packaging all the other stuff uses.

LE> I've never bought OTP devices. But it's the same device in a different case

Yep, only the quartz window is missing. When the vast bulk of eproms shipped
in say a modem never get returned to be reprogrammed with an eprom change in
the field, it makes a lot of sense to use the much cheaper OTP form instead.

You can also make a case that farting around shipping it back in traditional
eprom format is actually MUCH higher cost, just not quite so visible.
@EOT:

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