CAPACITIVE CHARACTERISTICS
Symbol Parameter Test Conditions Value Unit
T
A
= 25
o
C -40 to 85
o
C
Min. Typ. Max. Min. Max.
C
IN
Input Capacitance 4 10 10
pF
C
OUT
Output Capacitance 6
pF
C
PD
Power Dissipation
Capacitance (note 1)
19 pF
1) C
PD
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
Test Circuit). Average operating current can be obtained by the following equation. I
CC
(opr) = C
PD
•
V
CC
•
f
IN
+ I
CC
/48(per Gate)
TEST CIRCUIT
TEST SWITCH
t
PLH
, t
PHL
Open
t
PZL
, t
PLZ
V
CC
t
PZH
, t
PHZ
GND
C
L
= 15/50 pF or equivalent (includes jig and probe capacitance)
R
L
= R
1
= 1K
Ω
or equivalent
R
T
= Z
OUT
of pulse generator (typically 50
Ω
)
DYNAMIC SWITCHING CHARACTERISTICS
Symbol Parameter Test Conditions Value Unit
V
CC
(V)
T
A
= 25
o
C -40 to 85
o
C
Min. Typ. Max. Min. Max.
V
OLP
Dynamic Low Voltage
Quiet Output (note 1, 2)
5.0
C
L
= 50 pF
0.6 0.9
V
V
OLV
-0.9 -0.6
V
IHD
Dynamic High Voltage
Input (note 1, 3)
5.0 3.5
V
ILD
Dynamic Low Voltage
Input (note 1, 3)
5.0 1.5
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n -1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (V
ILD
), 0V to threshold (V
IHD
), f=1MHz.
74VHC244
4/8
