Cool vintage op amp - select your own parameters (programmable)

Discussion in 'General Electronics Chat' started by GopherT, Jul 7, 2015.

  1. GopherT

    Thread Starter AAC Fanatic!

    Nov 23, 2012
    I just found a tube full of these vintage op amps in a collection of junk I recently bought.
    The MC14575 is a single chip with two comparitors and two op amps. Already a cool idea. But, it has two mor pins than a standard quad package. Each pin allows you to select your bias current. The more current, the faster the amplifier and higher GBW. You can have a low power device or a high performance device. Perfect for a DIY. Simply ahead of its time.

    The datasheet shows two additional permutations - quad op amp and quad comparitor in addition to my dual op amp + dual comparitor chip.
  2. dl324

    Distinguished Member

    Mar 30, 2015
    Pretty neat! When I was an R&D tech, my group had a small supply of what my Boss called zip chips. They were die with uncommitted transistors and passive devices. To make custom devices for breadboarding, we could draw up a bonding diagram and a lady would wire it up for us.