Amazon.com: Texas Instruments LM741CN/NOPB Single General Purpose OP Amplifier, ±18V, 8-Pin MDIP Rail, 3.3 mm H x 9.27 mm L x 6.35 mm W (Pack of 10) : Industrial & Scientific
Amazon.com: 10 amplificadores operacionales UA741CN LM741 741 DIP-8IC – amplificadores Op Amps Dual Op Amp : Industrial y Científico
1PCS) LM741H IC OPAMP GP 1.5MHZ TO99-8 741 LM741: Amazon.com: Industrial & Scientific
NATIONAL SEMICONDUTOR LM741CN Operational Amplifier Single General Purpose, 18V, 8-Pin MDIP Rail, 1.5" (Pack of 20): Amazon.com: Industrial & Scientific