Moteur de recherche de fiches techniques de composants électroniques |
|
SN74HC257 Fiches technique(PDF) 2 Page - Texas Instruments |
|
|
SN74HC257 Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 21 page SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SCLS224B − DECEMBER 1982 − REVISED SEPTEMBER 2003 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 description/ordering information (continued) These devices are designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs do not load the data lines when the output-enable (G) input is at a high logic level. To ensure the high-impedance state during power up or power down, G should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. FUNCTION TABLE INPUTS OUTPUT Y G A/B A B ’HC257 ’HC258 H X X X Z Z L LL X L H L LH X H L L HX L L H L H X H H L ’HC257 logic diagram (positive logic) 4Y 3Y 2Y 1Y A/B G 4B 4A 3B 3A 2B 2A 1B 1A 4 2 3 7 5 6 9 11 10 12 14 13 1 15 Pin numbers shown are for the D, J, N, NS, and PW packages. |
Numéro de pièce similaire - SN74HC257 |
|
Description similaire - SN74HC257 |
|
|
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 |