http://boardsort.com/escrapforum/viewtopic.php?t=18119&p=31215
They use "Dallas switch" in the payout schedule about IC chips. Then they call it a "Dallas box" in the forum. I would call it a "Dallas chip".
Dallas was a manufacturer that built real time clocks for computers. They made it in a normal 28-40 pin DIL black plastic capsule with an embedded battery to power the clock and a small internal ram memory. They are really easy to spot on a main board, the capsule is a lot higher than a normal IC.
If you try to incinerate the chip without removing the battery first it will explode when the temperature is high enough to boil the electrolyte in the battery. I guess that is why they don't want it in an IC lot.
There are other manufacturers than Dallas of similar chips, but Dallas was the first to make them I think.
Some good pictures here, even showing the battery in a capsule that is cut open.
https://en.wikipedia.org/wiki/Real-time_clock
Göran