Appendix C

Rise and fall times for various logic families

Logic familyTransition time (ns)Rank (fastest)
RTFT
BiCMOSABT1.61.414
BCT0.70.712
LVT2.72.829
CMOSAC1.71.515
ACT1.71.525
ACQ2.42.416
ACTQ2.52.427
AHCT2.42.426
C352539
FCT1.51.213
HC3.64.133
HCT4.63.934
LCX2.92.428
LV3.03.030
LVQ3.53.231
LVX4.83.735
VCX2.02.020
VHC4.13.232
ECL10K2.22.222
10KH1.71.717
100K0.60.611
300K0.50.510
E0.380.388
EP0.110.116
LVEL0.220.223
EL0.230.235
SiGe-2.5V0.020.021
SiGe-3.3V0.30.032
GaAs 0.30.14
LVDS 0.30.37
SSTL 0.30.59
TTL74nn8.05.036
ALS2.32.324
AS2.11.518
F2.31.721
FR2.11.519
H7.07.037
L353040
LS151038
 S2.52.023

Image

FT, Fall time; RT, rise time.

Source: Partial data from IPC-2251, Design Guide for the ...

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