Datenblatt-Suchmaschine für elektronische Bauteile |
|
74F157ASJ Datenblatt(PDF) 2 Page - Fairchild Semiconductor |
|
74F157ASJ Datenblatt(HTML) 2 Page - Fairchild Semiconductor |
2 / 6 page www.fairchildsemi.com 2 Unit Loading/Fan Out Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Functional Description The F157A is a quad 2-input multiplexer. It selects four bits of data from two sources under the control of a common Select input (S). The Enable input (E) is active LOW. When E is HIGH, all of the outputs (Z) are forced LOW regardless of all other inputs. The F157A is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equations for the outputs are shown below: Zn = E • (I1nS + I0n S) A common use of the F157A is the moving of data from two groups of registers to four common output busses. The particular register from which the data comes is determined by the state of the Select input. A less obvious use is as a function generator. The F157A can generate any four of the 16 different functions of two variables with one variable common. This is useful for implementing highly irregular logic. Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. Pin Names Description U.L. Input IIH/IIL HIGH/LOW Output IOH/IOL I0a–I0d Source 0 Data Inputs 1.0/1.0 20 µA/−0.6 mA I1a–I1d Source 1 Data Inputs 1.0/1.0 20 µA/−0.6 mA E Enable Input (Active LOW) 1.0/1.0 20 µA/−0.6 mA S Select Input 1.0/1.0 20 µA/−0.6 mA Za–Zd Outputs 50/33.3 −1 mA/20 mA Inputs Output E S I0 I1 Z HX X X L LH X L L LH X H H LL L X L LL H X H |
Ähnliche Teilenummer - 74F157ASJ |
|
Ähnliche Beschreibung - 74F157ASJ |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller 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 |