Moteur de recherche de fiches techniques de composants électroniques |
|
M74HC181M1R Fiches technique(PDF) 2 Page - STMicroelectronics |
|
M74HC181M1R Fiches technique(HTML) 2 Page - STMicroelectronics |
2 / 13 page DESCRIPTION (continued) in the subtract mode with Cn = H when performing this comparison. The A = B output is open-drain so that it can be wire-AND connected to give a comparison for more that four bits. The carry output (Cn + 4) can also be used to supply relative magnitude information. Again, the ALU should be placed in the subtract mode by placing the function select inputs S3, S2, S1, S0 at L, H, H, L, respectively. These circuits have been de- signed to not only incorporate all of the designer’s re- quirements for arithmetic operations, but also to pro- vide 16 possible functions of two Boolean variables without the use of external circuitry. These logic func- tions are selected by use of the four function-select in- puts (S0, S1, S2, S3) with the mode-control input (M) at a high level to disable the internal carry. All inputs are equipped with protection circuits against static dis- charge and transient excess voltage. PIN DESCRIPTION PIN No SYMBOL NAME AND FUNCTION 2, 23, 21, 19 A0 to A3 Word A Inputs 1, 22, 20, 18 B0 to B3 Word B Inputs 6, 5, 4, 3 S0 to S3 Function Select Inputs 7 Cn Inv. Carry Input 8 M Mode Control Input 9, 10, 11, 13 F0 to F3 Function Outputs 14 A = B Comparator Output 15 P Carry Propagate Output 16 Cn + 4 Inv. Carry Output 17 G Carry Generate Output 12 GND Ground (0V) 24 VCC Positive Supply Voltage INPUT AND OUTPUT EQUIVALENT CIRCUITS PIN NUMBER 2 1 23 22 21 20 19 18 9 10 11 13 7 16 15 17 ACTIVE LOW DATA (Table 1) A0 B0 A1 B1 A2 B2 A3 B3 F0 F1 F2 F3 Cn Cn + 4 P G ACTIVE HIGH DATA (Table 1) A0 B0 A1 B1 A2 B2 A3 B3 F0 F1 F2 F3 Cn Cn + 4 X Y Input Cn Output Cn + 4 Active LOW Data (Figure 1) Active HIGH Data (Figure 2) HH A ≥ BA ≤ B HL A < B A > B LH A > B A < B LL A ≤ BA ≥ B IEC LOGIC SYMBOLS ONLY OUTPUT A = B M74HC181 2/13 |
Numéro de pièce similaire - M74HC181M1R |
|
Description similaire - M74HC181M1R |
|
|
Lien URL |
Politique de confidentialité |
ALLDATASHEET.FR |
ALLDATASHEET vous a-t-il été utile ? [ DONATE ] |
À propos de Alldatasheet | Publicité | Contactez-nous | Politique de confidentialité | Echange de liens | Fabricants All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |