[sdiy] vfc110's and other ic's

[trip at bluesummers.net]

I dug though some spare parts today, found some things i didn't know I had...
first was a set of 3 vfc110 voltage-to-frequency converters. they're specified
to have 0.005% linearity error at a sweep of 0-100 khz. I was thinking that
these would make great vco's, anyone tried using these before? the problem is
that they are open collector output from a oneshot, so 50% duty cycle will
be next to impossible without some kind of hack... there is an enable pin,
so maybe sync could be done easily, any ideas?

next off were 4 each of two types of ic, one marked 'bip2610-1' and
'bip2611-1'. the manufacturer logo appears to be burr-brown, and they're
extreamly old (mixed in with original 74xx ttl chips.) I can't find 
anything on these parts, does anyone know what they are?