93L24 5-Bit Comparator General Description Features The 93L24 expandable comparator provides comparison between two 5-bit words and gives three outputsБ‘less than’’, ‘‘greater than’’ and ‘‘equal to’’. A HIGH on the active LOW Enable Input forces all three outputs LOW. Y Connection Diagram Logic Symbol Y Y Three separate outputs: AkB, AlB, A e B Easily expandable Active low enable input Dual-In-Line Package TL/F/10199 – 2 VCC e Pin 16 GND e Pin 8 TL/F/10199 – 1 Order Number 93L24DMQB or 93L24FMQB See NS Package Number J16A or W16A Truth Table Pin Names E A0 – A4 B0 – B4 AkB AlB AeB 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) Inputs E H L L L An Outputs Bn X X Word A e Word B Word A l Word B Word B k Word A AkB AlB L L L H L L H L AeB L H L L H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial C1995 National Semiconductor Corporation TL/F/10199 RRD-B30M105/Printed in U. S. A. 93L24 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 7V Input Voltage 5.5V Operating Free Air Temperature Range b 55§ C to a 125§ C MIL b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol 93L24 (MIL) 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 Units Min Nom Max 4.5 5 5.5 V 2 V b 55 0.7 V b 400 mA 4.8 mA 125 §C Electrical Characteristics over recommended operating free air temperature (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 b10 mA VOH High Level Output Voltage VCC e Min, IOH e Max, VIL e Max, VIH e Min VOL Low Level Output Voltage VCC e Min, IOL e Max, VIH e Min, VIL e Max 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 40 mA IIL Low Level Input Current VCC e Max, VI e 0.3V b 0.8 mA IOS Short Circuit Output Current VCC e Max (Note 2) b 25 mA ICC Supply Current VCC e Max 21 mA 2.4 b 2.5 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, and the duration should not exceed one second. 2 V 0.3 V 1 mA Switching Characteristics VCC e a 5.0V, TA e a 25§ C (See Section 1 for test waveforms and output load) Symbol CL e 15 pF Parameter Min Units Max tPLH tPHL Propagation Delay E to A e B; E to AkB, AlB 32 35 ns tPLH tPHL Propagation Delay An to AlB; Bn to AlB 54 75 ns tPLH tPHL Propagation Delay An to AkB; Bn to AkB 70 77 ns tPLH tPHL Propagation Delay An or Bn to A e B 100 102 ns Functional Description Tying the AlB output from one device into an A input on another device and the Ak 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 AlB output will be HIGH regardless of all other inputs except E. The 93L24 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 ouptuts 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). Logic Diagram TL/F/10199 – 3 3 93L24 5-Bit Comparator Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 93L24DMQB NS Package Number J16A 16-Lead Ceramic Flat Package (W) Order Number 93L24FMQB 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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