Moteur de recherche de fiches techniques de composants électroniques |
|
SN74ALS160B Fiches technique(PDF) 10 Page - Texas Instruments |
|
SN74ALS160B Fiches technique(HTML) 10 Page - Texas Instruments |
10 / 11 page SN54ALS160B THRU SN54ALS163B, SN54AS160 THRU SN54AS163 SN74ALS160B THRU SN74ALS163B, SN74AS160 THRU SN74AS163 SYNCHRONOUS 4-BIT DECADE COUNTERS SDAS024A – D2661, APRIL 1982 – REVISED MAY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 10 APPLICATION INFORMATION N–bit synchronous counters This application demonstrates how the ripple mode carry circuit (Figure 1) and the carry-look-ahead circuit (Figure 2) can be used to implement a high-speed N-bit counter. The ’ALS160B, ’AS160, ’ALS162B, and ’AS162 will count in BCD and the ’ALS161B, ’AS161, ’ALS163B, and ’AS163 will count in binary. When additional stages are added, the fMAX decreases in Figure 1 , but remains unchanged in Figure 2. fMAX = 1/(CLK to RCO tPLH) + (ENP tsu) fMAX = 1/(CLK to RCO tPLH) + (ENT to RCO tPLH) (N–2) + (ENT tsu) CLOCK CLEAR (L) COUNT (H) DISABLE (L) LOAD (L) LOAD CLR ENT ENP CLK A B C CTR 3CT=MAX QA QB QC QD CT=0 M1 G3 G4 C5/T,3,4+ 1,5D LSB D D 1,5D C5/T,3,4+ G4 G3 M1 CT=0 QD QC QB QA 3CT=MAX CTR C B A CLK ENP ENT CLR LOAD D 1,5D C5/T,3,4+ G4 G3 M1 CT=0 QD QC QB QA 3CT=MAX CTR C B A CLK ENP ENT CLR LOAD D 1,5D C5/T,3,4+ G4 G3 M1 CT=0 QD QC QB QA RCO 3CT=MAX CTR C B A CLK ENP ENT CLR LOAD RCO RCO RCO To More Significant Stages CLOCK DISABLE (L) COUNT (H) LOAD (L) DISABLE (L) COUNT (H) CLEAR (L) To More Significant Stages RCO RCO RCO LOAD CLR ENT ENP CLK A B C CTR 3CT=MAX RCO QA QB QC QD CT=0 M1 G3 G4 C5/T,3,4+ 1,5D D LOAD CLR ENT ENP CLK A B C CTR 3CT=MAX QA QB QC QD CT=0 M1 G3 G4 C5/T,3,4+ 1,5D D LOAD CLR ENT ENP CLK A B C CTR 3CT=MAX QA QB QC QD CT=0 M1 G3 G4 C5/T,3,4+ 1,5D D D LSB 1,5D C5/T,3,4+ G4 G3 M1 CT=0 QD QC QB QA 3CT=MAX CTR C B A CLK ENP ENT CLR LOAD Figure 1. Ripple Mode Carry Circuit Figure 2. Carry-Look-Ahesd Circuit |
Numéro de pièce similaire - SN74ALS160B |
|
Description similaire - SN74ALS160B |
|
|
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 |