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54S138/74S138 STTL 3 -8 / :
· ·,/ ·
: tpd=8ns() tpd=7ns() Pd=245mW
:
S138 , ,。 , , 。 S138 , 8 。 , 24 ; 32 ,。,。
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54S138/74S138 STTL 3 -8 /
C × × L L L L H H H H B × × L L H H L L H H A × × L H L H L H L H G1 G2* × L H H H H H H H H H × L L L L L L L L Y0 H H L H H H H H H H Y1 H H H L H H H H H H Y2 H H H H L H H H H H Y3 H H H H H L H H H H Y4 H H H H H H L H H H Y5 H H H H H H H L H H Y6 H H H H H H H H L H Y7 H H H H H H H H H L * G2=G2A+G2B H= L= ×=
74Ⅱ Vcc VIH VIL IOH IOL TA -40 4.75 2.0 0.8 -1000 20 85 -55 5 5.25 4.5 2.0 0.8 -1000 20 125 54 5 5.5 V V V μA mA ℃
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