4585M
NEC
4585M Low Noise, Bipolar Input Dual, Audio Operational amplifier by NEC (DMP8 Pin Type): datasheet PDF, pinout and specifications.
4000 Series DMP8 Pin Type
CD4000 and HEF4000 series CMOS logic ICs.
4585M Low Noise, Bipolar Input Dual, Audio Operational amplifier by NEC (DMP8 Pin Type): datasheet PDF, pinout and specifications.