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[QUOTE="lubeck, post: 230083, member: 12924"]
Informacion sobre la fam 74

[B]TTL (74xx)	True TTL	 [/B]
74L	        Low power	 
74S	        Schottky	 
74H	        High speed 
74LS	        Low power - Schottky                 
74AS	        Advanced - Schottky	         
74ALS	        Advanced - Low power - Schottky                 
74F(AST)	Fast - (Advanced - Schottky)         
74C	        CMOS...................check Vcc levels		 
74HC (U)	High speed - CMOS (Unbuffered output)         
74HCT	        High speed - CMOS - TTL inputs		       
74AHC	        Advanced - High speed - CMOS		         
74AHCT	        Advanced - High speed - CMOS - TTL inputs	 
74FCT (-A)	Fast - CMOS - TTL inputs (speed variations)	 
74FCT (-T, -AT)	Fast - CMOS - TTL inputs (speed variations)	 
74AC	        Advanced - CMOS		                         
74ACT	        Advanced - CMOS - TTL inputs		        
74FACT	        AC, ACT (Q) series		                 
74ACQ	        Advanced - CMOS - Quiet outputs	                 
74ACTQ	        Advanced - CMOS - TTL inputs - Quiet outputs 
 [B]
   Bus Driver Families  [/B]
 
74ABT	        Advanced - BiCMOS - Technology	                
74ABTE	        ABT - Enhanced Transceiver Logic                 
74ABTH	        Advanced - BiCMOS - Technology - bus Hold	 
74BCT	        BiCMOS - TTL inputs 		                
74BTL	        Backplane - Transceiver - Logic		         
74GTL	        Gunning - Transceiver - Logic		         
74GTLP	        GTL Plus		                         
 
   [B]Low Voltage Families[/B]  
 
74ALB	        Advanced - Low Voltage - BiCMOS	                 
74LV (U)	Low - Voltage (Unbuffered output)	         
74LVC (R) (U)	LV - CMOS (damping Resistor)(Unbuffered output)	 
74LVCH	        Low - Voltage - CMOS - bus Hold	                 
74ALVC	        Advanced - Low - Voltage - CMOS	                 
74LVT (R) (U)	LV - TTL  (damping Resistor(Unbuffered output)	 
74LVTZ	        Low - Voltage - TTL - High Impedance power-up	 
74ALVC (R)	ALV - CMOS (bus Hold) (damping Resistor)	 
74ALVCH	        Advanced - Low - Voltage - CMOS - bus Hold	 
74LCX	        LV - CMOS (operates with 3v & 5v supplies)	 
74VCX	        LV - CMOS (operates with 1.8v & 3.6v supplies 
 
Y tengo un consulta... ustedes que opinan.... tengo un circuito que utiliza un 74ls148 y le envia los datos a un 74ls540, ambos  montados en sockets, se me daño el 74ls540 y lo remplace con un 74hc540 y ya no funciona igual el circuito... ¿son totalmente incompatbles las series lsy hc o deberia funcionar? ....
post.end.
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