Logik-ICs 74xxyyy

Bipolar
L	- Low power, very slow (obsoleted by LS)
H	- High speed (obsoleted by S, used in 1970s era computers)
S	- Schottky (obsolete)
LS	- Low Power Schottky
AS	- Advanced Schottky
ALS	- Advanced Low Power Schottky
F	- Fast (faster than normal Schottky, similar to AS)

BiCMOS
BCT	- BiCMOS, TTL compatible input thresholds, used for buffers
ABT	- Advanced BiCMOS, TTL compatible input thresholds, faster than ACT and BCT

CMOS
C	- CMOS 4-15V operation similar to 4000 series
HC	- High speed CMOS, similar performance to LS
HCU - High speed CMOS 'Ultra' (?) (Philips) faster than HC
AC	- Advanced CMOS, performance generally between S and F
AHC	- Advanced High-Speed CMOS, three times as fast as HC
FC	- Fast CMOS, performance similar to F
LCX	- CMOS with 3V supply and 5V tolerant inputs
LVQ	- Low voltage - 3.3V
LVX	- Low voltage - 3.3V with 5V tolerant inputs
VHC	- Very High Speed CMOS - 'S' performance in CMOS technology and power

Many parts in the HC, AC, and FC families are also offered in "T" versions (HCT, ACT, and FCT) which have TTL-compatible input thresholds. The non-T parts have CMOS input thresholds.


DDR-Typen:

DLxxx  == 74 LS xxx

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Typical Values

Type                        74xx 	S		F		LS		ALS		C		HC		HCU		VHC		HCT		
Operation Voltage           												2-6V	2-6V			4.5-5.5
Propagation Delay [5V,NOT]													7ns		5ns		3.8ns	8ns
Output Power                														±5.2mA