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1 M54HC221A DUAL MONOSTABLE MULTIVIBRATOR 295K ST 4267639
2 M54HC221AB1R DUAL MONOSTABLE MULTIVIBRATOR 295K ST 4988715
3 M54HC221AC1R DUAL MONOSTABLE MULTIVIBRATOR 295K ST 4549618
4 M54HC221AF1R DUAL MONOSTABLE MULTIVIBRATOR 295K ST 4267638
5 M54HC221AM1R DUAL MONOSTABLE MULTIVIBRATOR 295K ST 4547073