9324/DM9324 5-Bit Comparator General Description The 9324 expandable comparators provide comparison between two 5-bit words and give three outputsÐ‘‘less than’’, ‘‘greater than’’ and ‘‘equal to’’. A HIGH on the active LOW Enable Input forces all three outputs LOW. Connection Diagram Dual-In-Line Package TL/F/9792 – 1 Order Number 9324DMQB, 9324FMQB, or DM9324N See NS Package Number J16A, N16E or W16A Pin Names E A0–A4 B0–B4 AkB AlB AeB C1995 National Semiconductor Corporation TL/F/9792 Description Enable Input (Active LOW) Word A Parallel Inputs Word B Parallel Inputs A Less than B Output (Active HIGH) A Greater than B Output (Active HIGH) A Equal to B Output (Active HIGH) RRD-B30M115/Printed in U. S. A. 9324/DM9324 5-Bit Comparator June 1989 Absolute Maximum Ratings (Note) 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 ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Input Voltage Operating Free Air Temperature Range Military Commercial 7V b 55§ C to a 125§ C 0§ C to a 70§ C Storage Temperature Range b 65§ C to a 150§ C 5.5V Recommended Operating Conditions Symbol Military Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current IOL Low Level Output Current TA Free Air Operating Temperature Commercial Units Min Nom Max Min Nom Max 4.5 5 5.5 4.75 5 5.25 2 V 2 V 0.8 0.8 V b 0.8 b 0.8 mA 16 mA 70 §C 16 b 55 125 0 Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ (Note 1) Max Units b 1.5 V VI Input Clamp Voltage VCC e Min, II e b12 mA VOH High Level Output Voltage VCC e Min, IOH e Max VIL e Max VOL Low Level Output Voltage VCC e Min, IOL e Max VIH e Min II Input Current @ Max Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current VCC e Max, VI e 2.4V 80 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 3.2 mA IOS Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max ICC 2.4 3.4 0.2 V 0.4 V 1 mA MIL b 20 b 70 COM b 20 b 70 81 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. 2 mA mA Switching Characteristics VCC e a 5.0V, TA e a 25§ C (See Section 1 for waveforms and load configurations) Symbol CL e 15 pF Parameter Min Units Max tPLH tPHL Propagation Delay E to A e B 14 14 ns tPLH tPHL Propagation Delay An, Bn to A l B 25 22 ns tPLH tPHL Propagation Delay An, Bn to A k B 26 21 ns tPLH tPHL Propagation Delay An, Bn to A e B 30 32 ns Functional Description Truth Table The ’24 5-bit comparators use combinational circuitry to directly generate ‘‘A greater than B’’ and ‘‘A less than B’’ outputs. As evident from the logic diagram, these outputs are generated in only three gate delays. The ‘‘A equals B’’ output is generated in one additional gate delay by decoding the ‘‘A neither less than nor greater than B’’ condition with a NOR gate. All three outputs are activated by the active LOW Enable Input (E). Inputs E H L L L Tying the A l B output from one device into an A input on another device and the A k B output into the corresponding B input permits easy expansion. The A4 and B4 inputs are the most significant inputs and A0, B0 the least significant. Thus if A4 is HIGH and B4 is LOW, the A l B output will be HIGH regardless of all other inputs except E. An Outputs Bn AkB AlB AeB L L L H L L H L L H L L X X Word A e Word B Word A l Word B Word B l Word A H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Logic Symbol TL/F/9792 – 2 VCC e Pin 16 GND e Pin 6 3 Logic Diagram TL/F/9792 – 3 4 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9324DMQB NS Package Number J16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM9324N NS Package Number N16E 5 9324/DM9324 5-Bit Comparator Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 9324FMQB NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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