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1 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 636K TI 5133376
2 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 636K TI 4190072
3 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 198K MOTOROLA 4190071
4 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS 635K TI 4190070
5 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 780K TI 2139042
6 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 633K TI 408575
7 SN54LS221J DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS 633K TI 264832