All ProductsApex MicroSemiconductorsIntegrated Circuits (ics)Instrumentation, Op Amps, Buffer Amps APEX MICRO. SemiconductorsIntegrated Circuits (ics)Instrumentation, Op Amps, Buffer Amps PA75CD MFR. Name: Apex Micro. PA75CX MFR. Name: Apex Micro. PB64DP GENERAL PURPOSE AMPLIFIER 1 CIRCUIT 12-POWER SIP MFR. Name: Apex Micro.