◎ Digital Logic에 대해서

1. 각 Logic
1) 74Lxxx : Low Power, 74Series는 상업용, 54Series 군사용
2) 74Cxxx : CMOS
3) 74HCxxx : High-Speed CMOS
4) 74LSxxx : Low-Power Schottkey
5) 74Hxxx : High Power
6) 74Sxxx : Schottkey
7) 74HCTxxx : High-Speed CMOS(입력TTL)
8) 74ALSxxx : Advanced Low Power Schottkey
9) 74ACTxxx : Advanced CMOS Logic
10) 74Fxxx : Fast ( Tpd = 4ns)
11) ECL : Emitter Coupled Logic
12) BTL : Backplane Transceiver Logic
13) LVDS : Low Voltage Differential Signaling
14) GaAs : Gallium Arsenide(갈륨 비소)
15) GTL+ : Gunning Transceiver Logic
16) CMOS : Complementary Metal-oxide semiconductor
17) TTL : Transistor transistor Schottkey
18) TTL-LS : Low Power Schottkey TTL

2. 각 Logic의 Rise / Fall Time

Logic Family	일반적인 Rise / Fall Time	Logic Family	일반적인 Rise / Fall Time
74Lxxx	31 ~ 35ns	74ALSxxx	2 ~ 10ns
74Cxxx	25 ~ 60ns	74ACTxxx	2 ~ 5ns
74HCxxx	13 ~ 15ns	74Fxxx	1.5 ~ 1.6ns
74xxx	10 ~ 12ns	ECL 10K	1.5ns
(Flip-Flop)	15 ~ 22ns	ECL 100K	0.75ns
74LSxxx	9.5ns	BTL	1.0ns
(Flip-Flop)	13 ~ 15ns	LVDS	0.3ns
74Hxxx	4 ~ 6ns	GaAs	0.3ns
74Sxxx	3 ~ 4ns	GTL+ (Pentium Pro)	0.3ns
74HCTxxx	5 ~ 15ns

3. 각 Logic의 Voltage Swing / Input Cap. / DC Noise Margin / Out Res.

Logic Family	Voltage Swing (V)	Input Capa. (pF)	DC Noises Margin (V)	Typical Output R0(Low/High)(Ω)
CMOS, 5V	5	5	1.2	300 / 300
CMOS, 12V	12	5	3	300 / 300
TTL	3.3	5	0.4	30 / 150
TTL-LS	3.3	5.5	0.4	30 / 160
HCMOS	5	4	0.7	160 / 160
S-TTL	3.3	4	0.3	15 / 50
FAST&AS-TTL	3.3	4.5	0.3	15 / 40
ECL, 10K	0.8	3	0.1	7 / 7
GaAs	1	1	0.1	-