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Absolute Maximum Ratings (Note) If MilitaryAerospace specified devices are required please contact the National Semiconductor Sales OfficeDistributors for availability and specifications Supply Voltage 7V Input Voltage 55V Operating Free Air Temperature Range DM54 b 55 Cto a125 C DM74 0 Cto a70 C Storage Temperature Range b 65 Cto a150 C Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed 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 ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation Recommended Operating Conditions Symbol Parameter DM5490 DM7490A Units Min Nom Max Min Nom Max VCC Supply Voltage 45 5 55 475 5 525 V VIH High Level Input Voltage 2 2 V VIL Low Level Input Voltage 08 08 V IOH High Level Output Current b 08 b 08 mA IOL Low Level Output Current 16 16 mA fCLK Clock Frequency A 0 32 0 32 MHz (Note 5) B 0 16 0 16 tW Pulse Width A 15 15 (Note 5) B30 30 ns Reset 15 15 tREL Reset Release Time (Note 5) 25 25 ns TA Free Air Operating Temperature b 55 125 0 70 C ’90A Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 1) VI Input Clamp Voltage VCC e Min II eb12 mA b 15 V VOH High Level Output VCC e Min IOH e Max 24 34 V Voltage VIL e Max VIH e Min VOL Low Level Output VCC e Min IOL e Max 02 04 V Voltage VIH e Min VIL e Max (Note 4) II Input Current Max VCC e Max VI e 55V 1mA Input Voltage IIH High Level Input VCC e Max A 80 Current VI e 27V Reset 40 m A B 120 IIL Low Level Input VCC e Max A b 32 Current VI e 04V Reset b 16 mA B b 48 IOS Short Circuit VCC e Max DM54 b 20 b 57 mA Output Current (Note 2) DM74 b 18 b 57 ICC Supply Current VCC e Max (Note 3) 29 42 mA Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time Note 3 ICC is measured with all outputs open both RO inputs grounded following momentary connection to 45V and all other inputs grounded Note 4 QA outputs are tested at IOL e Max plus the limit value of IIL for the B input This permits driving the B input while maintaining full fan-out capability Note 5 TA e 25 C and VCC e 5V 2 |
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