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HD74HCT1G04
Rev.5.00, Jan.28.2004, page 5 of 7
Switching Characteristics
Ta = 25°C
Item Symbol
Min Typ Max
Unit Test Conditions
Output rise / fall time t
TLH
t
THL
— 6 10 ns Test circuit
t
PLH
—7.512Propagation delay time
t
PHL
—1017
ns Test circuit
(C
L
= 15 pF, t
r
= t
f
= 6 ns, V
CC
= 5 V)
Ta = 25°C
Ta = –40 to 85°C
Item Symbol
V
CC
(V)
Min Typ Max Min Max
Unit Test Conditions
Output rise / fall time t
TLH
t
THL
4.5 — 14 25 — 31 ns Test circuit
t
PLH
4.5 — 11.2 16 — 20Propagation delay time
t
PHL
4.5 — 16.4 27 — 31
ns Test circuit
Input capacitance C
IN
——2.55 — 5 pF
Equivalent capacitance C
PD
——10—— — pF
(C
L
= 50 pF, t
r
= t
f
= 6 ns)
Note: C
PD
is equivalent capacitance inside of the IC calculated from the operating current without load (see
test circuit). The average operating current without load is calculated according to the expression
below.
I
CC
(opr) = C
PD
• V
CC
• f
IN
+ I
CC