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| DM9324 5-Bit Comparator October 1988 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 DM9324N Package Number N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Logic Symbol Connection Diagram VCC = Pin 16 GND = Pin 6 Pin Descriptions Pin Names E A0-A4 B0-B4 AB A=B 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) Truth Table Inputs E H L L L An X Bn X AB L L H L A=B L H L L Word A = Word B Word A > Word B Word B > Word A H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial (c) 2000 Fairchild Semiconductor Corporation DS009792 www.fairchildsemi.com DM9324 Functional Description 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). 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 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 DM9324 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 5.5V 0C to +70C -65C to +150C 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. Recommended Operating Conditions Symbol VCC VIH VIL IOH IOL TA Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Current LOW Level Output Current Free Air Operating Temperature 0 Min 4.75 2 0.8 -0.8 16 70 Nom 5 Max 5.25 Units V V V mA mA C Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH VOL II IIH IIL IOS ICC Parameter Input Clamp Voltage HIGH Level Output Voltage LOW Level Output Voltage Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Short Circuit Output Current Supply Current Conditions VCC = Min, II = -12 mA VCC = Min, IOH = Max VIL = Max VCC = Min, IOL = Max VIH = Min VCC = Max, VI = 5.5V VCC = Max, VI = 2.4V VCC = Max, VI = 0.4V VCC = Max (Note 3) VCC = Max -20 2.4 3.4 0.2 0.4 1 80 -3.2 -70 81 Min Typ (Note 2) Max -1.5 Units V V V mA A mA mA mA Note 2: All typicals are at VCC = 5V, TA = 25C. Note 3: Not more than one output should be shorted at a time. Switching Characteristics VCC = +5.0V, TA = +25C Symbol tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay E to A = B Propagation Delay An, Bn to A > B Propagation Delay An, Bn to A < B Propagation Delay An, Bn to A = B Parameter CL = 15 pF Min Max 14 14 25 22 26 21 30 32 Units ns ns ns ns 3 www.fairchildsemi.com 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: 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 4 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. www.fairchildsemi.com |
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