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HD74UH04
Rev.4.00, Feb.02.2004, page 4 of 6
Switching Characteristics
(C
L
= 15 pF, t
r
= t
f
= 6 ns, V
CC
= 5 V)
Ta = 25°C
Item Symbol
Min Typ Max
Unit Test Conditions
Output rise/fall time t
TLH
t
THL
— 5 10 ns See Test circuit
Propagation delay time t
PLH
t
PHL
— 7 15 ns See Test circuit
(C
L
= 50 pF, t
r
= t
f
= 6 ns)
Ta = 25°C Ta = –40 to 85°C
Item Symbol
V
CC
(V)
Min Typ Max Min Max
Unit Test Conditions
2.0 — 50 125 — 155
4.5 — 14 25 — 31
Output rise/fall time t
TLH
t
THL
6.0 — 12 21 — 26
ns See Test circuit
2.0 — 48 100 — 125
4.5 — 12 20 — 25
Propagation delay time t
PLH
t
PHL
6.0 — 9 17 — 21
ns See Test circuit
Input capacitance C
IN
——510— 10
Equivalent capacitance C
PD
——10—— —
pF
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