Revised February 2000 DM9324 5-Bit Comparator General Description The DM9324 expandable comparators provide comparison between two 5-bit words and give three outputs—“less than”, “greater than” and “equal to”. A HIGH on the active LOW Enable Input forces all three outputs LOW. Ordering Code: Order Number Package Number DM9324N N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Connection Diagram Logic Symbol VCC = Pin 16 GND = Pin 6 Truth Table Pin Descriptions Pin Names Description Inputs Outputs E Enable Input (Active LOW) E An Bn A<B A>B A0–A4 Word A Parallel Inputs H X X L L L B0–B4 Word B Parallel Inputs L L L H A<B Word A = Word B A Less than B Output (Active HIGH) L Word A > Word B L H L A>B A Greater than B Output (Active HIGH) L H L L A=B Word B > Word A A Equal to B Output (Active HIGH) © 2000 Fairchild Semiconductor Corporation DS009792 A=B H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial www.fairchildsemi.com DM9324 5-Bit Comparator October 1988 DM9324 Functional Description Tying the A > B output from one device into an A input on another device and the A < B output into the corresponding B input permits easy expansion. 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). 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 > B output will be HIGH regardless of all other inputs except E. Logic Diagram www.fairchildsemi.com 2 Supply Voltage Note 1: 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 tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. 7V Input Voltage 5.5V 0°C to +70°C Operating Free Air Temperature Range −65°C to +150°C Storage Temperature Range Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.75 5 5.25 V LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.8 mA IOL LOW Level Output Current 16 mA TA Free Air Operating Temperature 70 °C VCC Supply Voltage VIH HIGH Level Input Voltage VIL 2 V 0 Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC = Min, II = −12 mA VOH HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max VOL LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min Min Typ Max (Note 2) −1.5 2.4 3.4 Units V V 0.2 0.4 V mA II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 IIH HIGH Level Input Current VCC = Max, VI = 2.4V 80 µA IIL LOW Level Input Current VCC = Max, VI = 0.4V −3.2 mA IOS Short Circuit Output Current VCC = Max (Note 3) ICC Supply Current VCC = Max −20 −70 mA 81 mA Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time. Switching Characteristics VCC = +5.0V, TA = +25°C Symbol CL = 15 pF Parameter Min Max tPLH Propagation Delay 14 tPHL E to A = B 14 tPLH Propagation Delay 25 tPHL An, Bn to A > B 22 tPLH Propagation Delay 26 tPHL An, Bn to A < B 21 tPLH Propagation Delay 30 tPHL An, Bn to A = B 32 3 Units ns ns ns ns www.fairchildsemi.com DM9324 Absolute Maximum Ratings(Note 1) DM9324 5-Bit Comparator Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Package Number N16E Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD’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 FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. www.fairchildsemi.com www.fairchildsemi.com 4