MC1458, MC1558 Dual 741-type operational amplifiers. +----------+ 1.out |1 +--+ 8| Vcc 1.-in |2 1458 7| 2.out 1.+in |3 1558 6| 2.-in Vee |4 5532 5| 2.+in +----------+ [This information is part of the GIICM]