DM5447A Datasheet | National Semiconductor

Description The 46A and 47A feature active-low outputs designed for driving mon-anode LEDs or incandescent indicators directly All of the circuits have full ripple-blanking input output controls and a lamp test input Segment identification and resultant displays are shown on a following page Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions All of the circuits incorporate automatic leading and or trailing-edge zero-blanking control (RBI and RBO) Lamp test (LT) of these devices may be performed at any time when the BI RBO node is at a high logic level All types contain an overriding blanking input (BI) which can be used to control the lamp intensity (by pulsing) or to inhibit the outputs Features All circuit types feature lamp intensity modulation capability Open-collector outputs drive indicators directly Lamp-test provision Leading trailing zero suppression Connection Diagram Dual-In-Line Package TL F 6518 - 1 Order Number DM5447AJ DM7446AN or DM7447AN See NS Package Number J16A or N16E C1995 National Semiconductor Corporation TL F 6518 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 DM74 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Remended Operating Conditions’’ table will define the conditions for actual device operation Remended Operating Conditions Symbol VCC VIH VIL VOH IOH IOL IOL TA Parameter Min Supply Voltage High Level...