Contextual Info: SGS-THOMSON M C 1489 ilL i S T O 3 ! 0Ê i M C 1489A QUAD LINE RECEIVERS INPUT RESISTANCE -3k to 7kQ INPUT SIGNAL RANGE - ± 30V INPUT THRESHOLD HYSTERESIS BUILT-IN RESPONSE CONTROL: a) LOGIC THRESHOLD SHIFTING b) INPUT NOISE FILTERING N DIP14 ( Plasticanti Ceramic)