Contextual Info: M ITSU B ISH I BIPOLAR DIGITAL ICs M54190FP TELEPHO NE LINEAR LS I DESCRIPTION M 54190FP functions is a lin e a r LSI for te le p h o n e s . It has bu ilt-in such as to n e ring er, speech n etw o rk, PIN CONFIGURATION TOP VIEW DTM F 4- I t- J ^ “ 3 0 . x s . 0 x