Familias logicas digitales

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  • Publicado : 30 de octubre de 2011
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Capítulo 5

Familias Lógicas

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¼ /DV
FpOXODV IXQGDPHQWDOHV HQ ORV FLUFXLWRV GLJLWDOHV VRQ ODV SXHUWDV OyJLFDV GHVFULWDV HQ HO FDStWXOR DQWHULRU ([LVWHQ XQD JUDQ YDULHGDG GH WHFQRORJtDV TXH SHUPLWHQ OD UHDOL]DFLyQ ItVLFD GH HVWDV SXHUWDV $XQTXH FLHUWDPHQWH VH SXHGHQ FRQVWUXLU SXHUWDV OyJLFDV XVDQGR GLVSRVLWLYRV QHXPiWLFRV KLGUiXOLFRV \ HOHFWURPHFiQLFRV HQ HVWH FXUVR VHDERUGD SULQFLSDOPHQWH HO XVR GH GLVSRVLWLYRV HOHFWUyQLFRV \ PiV HVSHFLDOPHQWH ORV GLVSRVLWLYRV LQWHJUDGRV PiV TXH ORV GLVFUHWRV

 ,1752'8&&,Ð1

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$ FRQWLQXDFLyQ VH GHVFULEHQ DOJXQDV UHDOL]DFLRQHV GH SXHUWDV OyJLFDVXWLOL]DQGR GLVSRVLWLYRV GLVFUHWRV WDOHV FRPR UHOHYDGRUHV WUDQVLVWRUHV \ GLRGRV
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8Q UHOHYDGRU HV XQ GLVSRVLWLYR HOHFWURPDJQpWLFR FRPSXHVWR SRU GRV FLUFXLWRV HOpFWULFRV DLVODGRV HQWUH Vt Š 8Q FLUFXLWR GH FRQWURO GH EDMD SRWHQFLD ERELQD Š 8Q FLUFXLWR FRQWURODGR GH DOWD SRWHQFLD FRQWDFWRV /D ~QLFD LQWHUDFFLyQ TXH H[LVWH HQWUH ORV GRV FLUFXLWRV HV GH WLSRPDJQpWLFR HQ OD VLJXLHQWH ILJXUD PXHVWUD HVTXHPiWLFDPHQWH ODV SDUWHV GH ODV TXH FRQVWD XQ UHOHYDGRU

Resorte Contactos: Normalmente cerrado Normalmente abierto N.C. N.A.

Bobina SíMBOLO

DIAGRAMA DESCRIPTIVO

43

Capítulo 5

Familias Lógicas

(Q XQ GLDJUDPD OyJLFR FRPELQDFLRQDO QR VH UHSUHVHQWDQ ODV ERELQDV \D TXH QR LQWHUYLHQHQ pVWDV VLPSOHPHQWH VH HQHUJL]DQ SDUD TXH HO FLUFXLWR DFW~H6RODPHQWH VH UHSUHVHQWDQ ORV FRQWDFWRV \ SRU HOOR D HVWRV GLDJUDPDV VXHOH OODPiUVHOHV GLDJUDPDV GH FRQWDFWRV /DV SXHUWDV OyJLFDV EiVLFDV $1' \ 25 XVDQGR UHOHYDGRUHV FRUUHVSRQGHQ UHVSHFWLYDPHQWH D ODV FRQH[LRQHV VHULH \ SDUDOHOR GH VXV FRQWDFWRV PLHQWUDV TXH HO FRPSOHPHQWR IXQFLyQ 127 GH XQD YDULDEOH SXHGH LPSOHPHQWDUVH PHGLDQWH HO XVR GHO FRQWDFWR QRUPDOPHQWH FHUUDGR GHO UHOHYDGRUFRUUHVSRQGLHQWH

(MHPSOR

(Q OD VLJXLHQWH ILJXUD VH PXHVWUD OD LPSOHPHQWDFLyQ GH XQD IXQFLyQ OyJLFD GH WUHV YDULDEOHV REVpUYHVH TXH VH XVD XQ UHOHYDGRU SRU FDGD YDULDEOH GH OD IXQFLyQ \ DXQTXH QR VH UHSUHVHQWDQ FDGD ERELQD FRQWUROD ORV FRQWDFWRV DVRFLDGRV D XQD PLVPD YDULDEOH ERROHDQD

A

B

C f=(ABC+AB)C C

A
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B

$OJXQRV GLVSRVLWLYRV OyJLFRV VHQFLOORV SXHGHQVHU LPSOHPHQWDGRV XVDQGR VyOR GLRGRV FRPR GLVSRVLWLYRV GH FRQPXWDFLyQ (Q OD VLJXLHQWH ILJXUD VH PXHVWUD HO GLDJUDPD GH GRV SXHUWDV OyJLFDV FRQ GLRGRV

+5V

A B f= A+B

A B

f=A.B

Puerta NAND

Puerta OR

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(O WUDQVLVWRU HV HO GLVSRVLWLYR HOHFWUyQLFR GH FRQPXWDFLyQ SRU H[FHOHQFLD \ SRU HOOR HQ VXV GLIHUHQWHV YDULDQWHV WUDQVLVWRUHV GH XQLyQ %-7·VWUDQVLVWRUHV GH HIHFWR GH FDPSR )(7·V \ 026)(7·V HWF HVWi EDVDGD SUiFWLFDPHQWH WRGD OD HOHFWUyQLFD GLJLWDO PRGHUQD (Q OD VLJXLHQWH ILJXUD VH PXHVWUDQ LPSOHPHQWDFLRQHV VLPSOHV SDUD ODV SXHUWDV OyJLFDV IXQGDPHQWDOHV $1' 25 \ 127 

44

Capítulo 5 Vcc A A B A.B A+B A Vcc

Familias Lógicas Vcc

B

A

Puerta AND

Puerta OR

Puerta NOT

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