MM74C85

MM54C85 MM74C85 4-Bit Magnitude Comparator September 1989 MM54C85 MM74C85 4-Bit Magnitude Comparator General Description The MM54C85 MM74C85 is a four-bit magnitude comparator which will perform comparison of straight binary or BCD codes The circuit consists of eight comparing inputs (A0 A1 A2 A3 B0 B1 B2 B3) three cascading inputs (A l B A k B and A e B) and three outputs (A l B A k B and A e B) This device compares two four-bit words (A and B) and determines whether they are ‘‘greater than ’’ ‘‘less than ’’ or ‘‘equal to’’ each other by a high level on the appropriate output For words greater than four-bits units can be cascaded by connecting the outputs (A l B A k B and A e B) of the least significant stage to the cascade inputs (A l B A k B and A e B) of the next-significant stage In addition the least significant stage must have a high level voltage (VIN(1)) applied to the A e B input and low level voltage (VIN(0)) applied to A l B and A k B inputs Features Y Y Y Y Y Y Y Wide supply voltage range Guaranteed noise margin High noise immunity Low power TTL compatibility Expandable to ‘N’ stages Applicable to binary or BCD Low power pinout 54L85 74L85 3 0V to 15V 1 0V 0 4 VCC (typ ) fan out of 2 driving 74L Logic Diagram TL F 5886 – 1 C1995 National Semiconductor Corporation TL F 5886 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Voltage at Any Pin Operating Temperature Range MM54C85 MM74C85 Storage Temperature Range b 0 3V to VCC a 0 3V b 55 C to a 125 C b 40 C to a 85 C b 65 C to a 150 C Power Dissipation (PD) Dual-In-Line Small Outline Operating VCC Range VCC Lead Temperature (Soldering 10 seconds) 700 mW 500 mW 3 0V to 15V 18V 260 C DC Electrical Characteristics Min Symbol CMOS TO CMOS VIN(1) VIN(0) VOUT(1) VOUT(0) IIN(1) IIN(0) ICC VIN(1) VIN(0) VOUT(1) VOUT(0) Logical ‘‘1’’ Input Voltage Logical ‘‘0’’ Input Voltage Logical ‘‘1’’ Output Voltage Logical ‘‘0’’ Output Voltage Logical ‘‘1’’ Input Current Logical ‘‘0’’ Input Current Supply Current Logical ‘‘1’’ Input Voltage Logical ‘‘0’’ Input Voltage Logical ‘‘1’’ Output Voltage Logical ‘‘0’’ Output Voltage Parameter Max limits apply across temperature range unless otherwise noted Conditions Min 35 80 15 20 45 90 05 10 0 005 b1 0 b 0 005 Typ Max Units V V V V V V V V mA mA mA V V VCC e 5 0V VCC e 10V VCC e 5 0V VCC e 10V VCC e 5 0V IO e b10 mA VCC e 10V IO e b10 mA VCC e 5 0V IO e a 10 mA VCC e 10V IO e a 10 mA VCC e 15V VIN e 15V VCC e 15V VIN e 0V VCC e 15V 54C VCC e 4 5V 74C VCC e 4 75V 54C VCC e 4 5V 74C VCC e 4 75V 54C VCC e 4 5V IO e b360 mA 74C VCC e 4 75V IO e b360 mA 54C VCC e 4 5V IO e 360 mA 74C VCC e 4 75V IO e 360 mA VCC e 5 0V VOUT e 0V TA e 25 C VCC e 10V VOUT e 0V TA e 25 C VCC e 5 0V VOUT e VCC TA e 25 C VCC e 10V VOUT e VCC TA e 25 C 10 300 0 05 VCC b 1 5 VCC b 1 5 CMOS LPTTL INTERFACE 08 08 24 24 04 04 V V V V V V OUTPUT DRIVE (See 54C 74C Family Characteristics Data Sheet) (Short Circuit Current) ISOURCE ISOURCE ISINK ISINK Output Source Current (P-Channel) Output Source Current (P-Channel) Output Sink Current (N-Channel) Output Sink Current (N-Channel) b 1 75 b8 0 b3 3 b 15 mA mA mA mA 1 75 80 36 16 AC Electrical Characteristics Symbol tpd Parameter Propagation Delay from any A or B Data Input to any Data Output Propagation Delay Time from any Cascade Input to any Output Input Capacitance Power Dissipation Capacitance TA e 25 C CL e 50 pF unless otherwise specified Conditions VCC e 50V VCC e 10V VCC e 50V VCC e 10V Any Inupt (Note 3) Per Package Min Typ 250 100 200 100 50 45 Max 600 300 500 250 Units ns ns ns ns pF pF tpd CIN CPD AC Parameters are guaranteed by DC correlated testing Note 1 ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed Except for ‘‘Operating Temperature Range’’ they are not meant to imply that the devices should be operated at these limits The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation Note 2 Capacitance is guaranteed by periodic testing Note 3 CPD determines the no load AC power consumption of any CMOS device For complete explanation see 54C 74C Family Characteristics application note AN-90 2 Typical Applications Four Digit Comparator Connection Diagram Dual-In-Line Package TL F 5886 – 3 Top View Order Number MM54C85 or MM74C85 Switching Time Waveforms TL F 5886 – 4 Unused inputs must be tied to an appropriate logic level TL F 5886 – 2 Truth Table Comparing Inputs A3 B3 A3 l B3 A3 k B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A3 e B3 A2 B2 X X A2 l B2 A2 k B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A2 e B2 A1 B1 X X X X A1 l B1 A1 k B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A1 e B1 A0 B0 X X X X X X A0 l B0 A0 k B0 A0 e B0 A0 e B0 A0 e B0 A0 e B0 A0 e B0 A0 e B0 A0 e B0 A0 e B0 X X X X X X X X H L L L H H H L Cascading Inputs AlB AkB X X X X X X X X L H L H L H H L AeB X X X X X X X X L L H H H H L L AlB H L H L H L H L H L L L H H H L Outputs AkB L H L H L H L H L H L H L H H L AeB L L L L L L L L L L H H H H L L H e high level L e low level X e irrelevant 3 MM54C85 MM74C85 4-Bit Magnitude Comparator Physical Dimensions inches (millimeters) Ceramic Dual-In-Line Package (J) Order Number MM54C85J or MM74C85J NS Package Number J14A Molded Dual-In-Line Package (N) Order Number MM54C85N or MM74C85N NS Package Number N16E 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 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 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 National Semiconductor Corporation 1111 West Bardin Road Arlington TX 76017 Tel 1(800) 272-9959 Fax 1(800) 737-7018 2 A critical component is 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 National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications