[sci.electronics] Identify this chip

ls0@uafhcx.uucp (LI SHENG) (11/03/90)

       Hi,

            Recently I have got a dead modem.  There are many reasons
        lead me to believe one of the chip had gone bad.  I tried as
        hard as I can but still I could not find out what chip this is.
        The markings on the chip are as following:

               P89027
               SZ224
               L9351021
               mc INTEL'86

        Could somebody tell me what is this and where I can get one?

        Many thanks.

                                                Li Sheng 
                                                11-2-1990

ls0@uafhcx.uucp (LI SHENG) (11/03/90)

      Oops, forgot to give my address. My mailing address is:
  
                 ls0@130.184.64.209