DS8884A Datasheet | National Semiconductor

Description The DS8884A is designed to decode four lines of BCD input and drive seven-segment digits of gas-filled readout displays All outputs consist of switchable and programmable current sinks which provide constant current to the tube cathodes even with high tube anode supply tolerance Output currents may be varied over the 0 2 m A to 1 2 m A range for multiplex operation The output current is adjusted by connecting an external program resistor (RP) from VCC to the program input in accordance with the programming curve Unused outputs must be tied to VCC Features Y Y Y Y Y Y Y Usable with AC or DC input coupling Current sink outputs High output breakdown voltage Low input load current Intended for multiplex operation Input pullups increase noise immunity ma d pt drive Connection Diagram Dual-In-Line Package TL F 5847 - 2 Top View Order Number DS8884AN See NS Package Number N18A C1995 National Semiconductor Corporation TL F 5847 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note 1) Storage Temperature Range Maximum Power Dissipation at 25 C Molded Package Derate molded package 13 71 m W C above 25 C If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications VCC Input Voltage (Note 4) Segment Output Voltage Power Dissipation Transient Segment Output Current (Note 5) 7V VCC 80V 600 m W 50 m A b 65 C to a 150 C 1714 m W Operating Conditions Supply Voltage (VCC) Temperature (TA) Min 4 75 0 Max 5 25 a 70 Units V C Electrical Characteristics (Notes 2 and 3) Symbol VIH VIL IIH IIL ICC VI a VIb D IO Ib ON Parameter Logical ‘‘1’’ Input Voltage Logical ‘‘0’’ Input Voltage Logical ‘‘1’’ Input Current Logical ‘‘0’’ Input Current Power Supply Current Positive Input Clamp Voltage Negative Input Clamp Voltage SEGMENT OUTPUTS ‘‘ON’’ Current Ratio Output b ‘‘ON’’ Current VCC e 4 75V VCC e 4 75V VCC e 5 25V VIN e 2 4V VCC e 5 25V VIN e 0 4V VCC e 5 25V RP e 2 8k All...