DM5447A

  The DM5447A and DM5447A feature active-low outputs designed for driving common-anode LEDs or incandescent indicators di-rectly. All of the circuits have full ripple-blanking inputout-put controls and a lamp test input. Segment identification and resultant displays are shown on a following page. Dis-play patterns for BCD input counts above nine are unique symbols to authenticate input conditions

  All of the DM5447A and DM5447A circuits incorporate automatic leading andor trail-ing-edge zero-blanking control (RBI and RBO) Lamp test (LT) of these devices may be performed at any time when the BIRBO node is at a high logic level All types contain an overriding blanking input (BI) which can be used to con-trol the lamp intensity (by pulsing) or to inhibit the outputs