Model Power supply voltage ±min-±max MC33178 2-18 NE5532 3-20 SE5532 3-20 MC33078 5-18 MC33077 2.5-18 LM258 1.5-18 LM2904 1.5-13 LM358 1.5-18 MC33172 1.5-22 MC33072 1.5-22 TCA0372 2.5-20 are all 2-channel, dual power supply, (some are single\/dual universal)