Rise and fall times for various logic families
Logic family | Transition time (ns) | Rank (fastest) | ||
---|---|---|---|---|
RT | FT | |||
BiCMOS | ABT | 1.6 | 1.4 | 14 |
BCT | 0.7 | 0.7 | 12 | |
LVT | 2.7 | 2.8 | 29 | |
CMOS | AC | 1.7 | 1.5 | 15 |
ACT | 1.7 | 1.5 | 25 | |
ACQ | 2.4 | 2.4 | 16 | |
ACTQ | 2.5 | 2.4 | 27 | |
AHCT | 2.4 | 2.4 | 26 | |
C | 35 | 25 | 39 | |
FCT | 1.5 | 1.2 | 13 | |
HC | 3.6 | 4.1 | 33 | |
HCT | 4.6 | 3.9 | 34 | |
LCX | 2.9 | 2.4 | 28 | |
LV | 3.0 | 3.0 | 30 | |
LVQ | 3.5 | 3.2 | 31 | |
LVX | 4.8 | 3.7 | 35 | |
VCX | 2.0 | 2.0 | 20 | |
VHC | 4.1 | 3.2 | 32 | |
ECL | 10K | 2.2 | 2.2 | 22 |
10KH | 1.7 | 1.7 | 17 | |
100K | 0.6 | 0.6 | 11 | |
300K | 0.5 | 0.5 | 10 | |
E | 0.38 | 0.38 | 8 | |
EP | 0.11 | 0.11 | 6 | |
LVEL | 0.22 | 0.22 | 3 | |
EL | 0.23 | 0.23 | 5 | |
SiGe-2.5V | 0.02 | 0.02 | 1 | |
SiGe-3.3V | 0.3 | 0.03 | 2 | |
GaAs | 0.3 | 0.1 | 4 | |
LVDS | 0.3 | 0.3 | 7 | |
SSTL | 0.3 | 0.5 | 9 | |
TTL | 74nn | 8.0 | 5.0 | 36 |
ALS | 2.3 | 2.3 | 24 | |
AS | 2.1 | 1.5 | 18 | |
F | 2.3 | 1.7 | 21 | |
FR | 2.1 | 1.5 | 19 | |
H | 7.0 | 7.0 | 37 | |
L | 35 | 30 | 40 | |
LS | 15 | 10 | 38 | |
S | 2.5 | 2.0 | 23 |
FT, Fall time; RT, rise time.
Source: Partial data from IPC-2251, Design Guide for the ...
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