74F182PC

54F 74F182 Carry Lookahead Generator December 1994 54F 74F182 Carry Lookahead Generator General Description The ’F182 is a high-speed carry lookahead generator It is generally used with the ’F181 or ’F381 4-bit arithmetic logic units to provide high-speed lookahead over word lengths of more than four bits Features Y Y Y Provides lookahead carries across a group of four ALUs Multi-level lookahead high-speed arithmetic operation over long word lengths Guaranteed 4000V minimum ESD protection Commercial 74F182PC Military Package Number N16E Package Description 16-Lead (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line 16-Lead (0 300 Wide) Molded Small Outline EIAJ 16-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C 54F182DM (Note 2) 74F182SJ (Note 1) 54F182FM (Note 2) 54F182LM (Note 2) J16A M16D W16A E20A Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Logic Symbols IEEE IEC Connection Diagrams Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC TL F 9492 – 1 TL F 9492 – 2 TL F 9492–6 TL F 9492–3 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9492 RRD-B30M105 Printed in U S A Unit Loading Fan Out 54F 74F Pin Names Description UL HIGH LOW 10 20 1 0 14 0 1 0 16 0 10 80 10 80 10 60 10 40 50 33 3 50 33 3 50 33 3 Input IIH IIL Output IOH IOL 20 mA b1 2 mA 20 mA b8 4 mA 20 mA b9 6 mA 20 mA b4 8 mA 20 mA b4 8 mA 20 mA b3 6 mA 20 mA b2 4 mA b 1 mA 20 mA b 1 mA 20 mA b 1 mA 20 mA Cn G0 G2 G1 G3 P0 P1 P2 P3 Cn a xbCn a z G P Carry Input Carry Generate Inputs (Active LOW) Carry Generate Input (Active LOW) Carry Generate Input (Active LOW) Carry Propagate Inputs (Active LOW) Carry Propagate Input (Active LOW) Carry Propagate Input (Active LOW) Carry Outputs Carry Generate Output (Active LOW) Carry Propagate Output (Active LOW) Functional Description The ’F182 carry lookahead generator accepts up to four pairs of Active LOW Carry Propagate (P0 – P3) and Carry Generate (G0 – G3) signals and an Active HIGH Carry input (Cn) and provides anticipated Active HIGH carries (Cn a x Cn a y Cn a z) across four groups of binary adders The ’F182 also has Active LOW Carry Propagate (P) and Carry Generate (G) outputs which may be used for further levels of lookahead The logic equations provided at the outputs are Cn a x e G0 a P0Cn Cn a y Cn a z G P e G1 a P1G0 a P1P0Cn e G2 a P2G1 a P2P1G0 a P2P1P0Cn e G3 a P3G2 a P3P2G1 a P3P2P1G0 e P2P2P1P0 Also the ’F182 can be used with binary ALUs in an active LOW or active HIGH input operand mode The connections (Figure 1) to and from the ALU to the carry lookahead generator are identical in both cases Carries are rippled between lookahead blocks The critical speed path follows the circled numbers There are several possible arrangements for the carry interconnects but all achieve about the same speed A 28-bit ALU is formed by dropping the last ’F181 or ’F381 TL F 9492 – 5 FIGURE 1 32-Bit ALU with Rippled Carry between 16-Bit Lookahead ALUs ALUs may be either ’F181 or ’F381 2 Truth Table Inputs Cn X L X H X X L X X H X X X L X X X H G0 H H L X X H H X L X X X H H X X L X X X X H X X X L H X X X L P0 H X X L X H X X X L X X H X X X X L H H H L X X X H H H X L X X X X H H X X L X H X X X L L X H X X X X L L X X H X X X X L X H X X L H H H H L X X X X H H H X L X X H X X X X L L L X H X X X X L L X X H X L H H H H L X X X H X X X X L L L X X X H L G1 P1 G2 P2 G3 P3 Cn a x L L H H L L L H H H L L L L H H H H H H H H L L L L H H H H L Outputs Cn a y Cn a z G P H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Logic Diagram TL F 9492 – 4 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays 3 Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Plastic VCC Pin Potential to Ground Pin b 65 C to a 150 b 55 C to a 125 b 55 C to a 175 b 55 C to a 150 Recommended Operating Conditions Free Air Ambient Temperature Military Commercial Supply Voltage Military Commercial b 55 C to a 125 C 0 C to a 70 C a 4 5V to a 5 5V a 4 5V to a 5 5V C C C C b 0 5V to a 7 0V b 0 5V to a 7 0V Input Voltage (Note 2) b 30 mA to a 5 0 mA Input Current (Note 2) Voltage Applied to Output in HIGH State (with VCC e 0V) b 0 5V to VCC Standard Output b 0 5V to a 5 5V TRI-STATE Output Current Applied to Output in LOW State (Max) twice the rated IOL (mA) ESD Last Passing Voltage (Min) 4000V Note 1 Absolute maximum ratings are values beyond which the device may be damaged or have its useful life impaired Functional operation under these conditions is not implied Note 2 Either voltage limit or current limit is sufficient to protect inputs DC Electrical Characteristics Symbol VIH VIL VCD VOH Parameter Min Input HIGH Voltage Input LOW Voltage Input Clamp Diode Voltage Output HIGH Voltage Output LOW Voltage Input HIGH Current Input HIGH Current Breakdown Test Output HIGH Leakage Current Input Leakage Test Output Leakage Circuit Current Input LOW Current 54F 10% VCC 74F 10% VCC 74F 5% VCC 54F 10% VCC 74F 10% VCC 54F 74F 54F 74F 54F 74F 74F 74F 4 75 3 75 b1 2 b2 4 b3 6 b4 8 b8 4 b9 6 b 60 b 150 54F 74F Typ Max Units V 08 b1 2 VCC Conditions Recognized as a HIGH Signal Recognized as a LOW Signal 20 V V V Min Min IIN e b18 mA IOH e b1 mA IOH e b1 mA IOH e b1 mA IOL e 20 mA IOL e 20 mA VIN e 2 7V VIN e 7 0V VOUT e VCC IID e 1 9 mA All Other Pins Grounded VIOD e 150 mV All Other Pins Grounded VIN VIN VIN VIN VIN VIN e e e e e e 25 25 27 05 05 20 0 50 100 70 250 50 VOL IIH IBVI ICEX VID IOD IIL V mA mA mA V mA Min Max Max Max 00 00 mA Max 0 5V (Cn) 0 5V (P3) 0 5V (P2) 0 5V (G3 P0 P1) 0 5V (G0 G2) 0 5V (G1) IOS ICCH ICCL Output Short-Circuit Current Power Supply Current Power Supply Current mA mA mA Max Max Max VOUT e 0V VO e HIGH VO e LOW 18 4 23 5 4 28 0 36 0 AC Electrical Characteristics 74F Symbol Parameter Min tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation Delay Cn to Cn a x Cn a y Cn a z Propagation Delay P0 P1 or P2 to Cn a x Cn a y or Cn a z Propagation Delay G0 G1 or G2 to Cn a x Cn a y or Cn a z Propagation Delay P1 P2 or P3 to G Propagation Delay Gn to G Propagation Delay Pn to P 30 30 25 15 25 15 30 30 30 30 30 25 TA e a 25 C VCC e a 5 0V CL e 50 pF Typ 66 68 62 37 65 39 79 60 83 57 57 41 Max 85 90 80 50 85 52 10 0 80 10 5 75 75 55 54F TA VCC e Mil CL e 50 pF Min 30 30 25 10 25 10 30 25 30 25 25 25 Max 12 0 11 0 11 0 70 11 0 70 12 0 10 0 12 0 10 0 10 0 80 74F TA VCC e Com CL e 50 pF Min 30 30 25 15 25 15 30 30 30 30 30 25 Max 95 10 0 90 60 95 60 11 0 90 11 5 85 85 65 ns Units ns ns ns ns ns Ordering Information The device number is used to form part of a simplified purchasing code where the package type and temperature range are defined as follows 74F Temperature Range Family 74F e Commercial 54F e Military Device Type Package Code P e Plastic DIP D e Ceramic DIP F e Flatpak L e Leadless Chip Carrier (LCC) SJ e Small Outline SOIC EIAJ 182 P C QB Special Variations QB e Military grade with environmental and burn-in processing shipped in tubes Temperature Range C e Commercial (0 C to a 70 C) M e Military (b55 C to a 125 C) 5 Physical Dimensions inches (millimeters) 20-Lead Ceramic Leadless Chip Carrier (L) NS Package Number E20A 16-Lead Ceramic Dual-In-Line Package (D) NS Package Number J16A 6 Physical Dimensions inches (millimeters) (Continued) 16-Lead (0 300 Wide) Molded Small Outline Package EIAJ (SJ) NS Package Number M16D 16-Lead (0 300 Wide) Molded Dual-In-Line Package (P) NS Package Number N16E 7 54F 74F182 Carry Lookahead Generator Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flatpak (F) 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 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