74AC273(1998) 查看數據表（PDF） - STMicroelectronics
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74AC273 Datasheet PDF : 10 Pages
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74AC273
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns)
Symb ol
Parameter
tPLH Propagation Delay Time
tPHL CLOCK to Q
tPHL Propagation Delay Time
CLEAR to Q
tw CLEAR pulse Width
tw CLOCK pulse Width
ts Setup Time D to CK
HIGH or LOW
th Hold Time D to CK
HIGH or LOW
tREM Recovery Time CLEAR
to CLOCK
fMAX Maximum Clock
Frequency
*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5V ± 0.5V
T est Con ditio n
VCC
(V)
3.3(*)
5.0(*)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
Valu e
TA = 25 oC
-40 to 85 oC
Min. T yp. Max. Min. Max.
4.0 8.0 12.5 3.0 14.0
3.0 5.5 9.0 2.5 10.0
4.0 8.5 13.0 3.0 14.0
3.0 6.5 10.0 2.5 11.0
5.5
6.0
4.0
4.5
5.5
6.0
4.0
4.5
5.5
6.0
4.0
4.5
1.5
1.5
1.5
1.5
4.0
4.5
3.0
3.0
90
75
140 190
125
Unit
ns
ns
ns
ns
ns
ns
ns
MHz
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Conditions
VCC
(V)
Valu e
TA = 25 oC
-40 to 85 oC
Min. T yp. Max. Min. Max.
Unit
CIN Input Capacitance
5.0
4
pF
CPD Power Dissipation
5.0
fIN = 10 MHz
TBD
pF
Capacitance (note 1)
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN + ICC/n(per circuit)
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