The test benches that correspond to the models are shown in the
following list:

        Model:            Test Bench:
        ------            -----------
        SN54368           SN54368_TB
        SN5438            SN5438_TB
        SN54LS00          SN54LS00_TB
        SN54LS04          SN54LS04_TB
        SN54LS109         SN54LS109_TB
        SN54LS112         SN54LS112_TB
        SN54LS161         SN54LS161_TB
        SN54S00           SN54S00_TB
        SN54S02           SN54S02_TB
        SN54S04           SN54S04_TB
        SN54S08           SN54S08_TB
        SN54S11           SN54S11_TB
        SN54S112          SN54S112_TB
        SN54S138          SN54S138_TB
        SN54S140          SN54S140_TB
        SN54S175          SN54S175_TB
        SN54S251          SN54S251_TB
        SN54S280          SN54S280_TB
        SN54S86           SN54S86_TB