Digital Logic ؼ

1. Logic
1) 74Lxxx : Low Power, 74Series , 54Series
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(ԷTTL)
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( )
15) GTL+ : Gunning Transceiver Logic
16) CMOS : Complementary Metal-oxide semiconductor
17) TTL : Transistor transistor Schottkey
18) TTL-LS : Low Power Schottkey TTL

2. Logic Rise / Fall Time

Logic Family

Ϲ
Rise / Fall Time

Logic Family

Ϲ
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. Logic 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)()

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

-