PersonalCorpus 版 (精华区)

比 较 项 目             GND     VOL     VIL     Vt      VIH     VOH     Vcc

5V CMOS                 0       0.5     1.5     2.5     3.5     4.44    5
5V TTL                  0       0.4     0.8     1.5     2       2.4     5
3.3V TTL，LVC，ALVT等   0       0.4     0.8     1.5     2       2.4     3.3