MC74LCX244
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4
DC ELECTRICAL CHARACTERISTICS
T
A
= −55°C to +125°C
Symbol Characteristic Condition Min Max Units
V
IH
HIGH Level Input Voltage (Note 3)
2.3 V ≤ V
CC
≤ 2.7 V 1.7
V
2.7 V ≤ V
CC
≤ 3.6 V 2.0
V
IL
LOW Level Input Voltage (Note 3)
2.3 V ≤ V
CC
≤ 2.7 V 0.7
V
2.7 V ≤ V
CC
≤ 3.6 V 0.8
V
OH
HIGH Level Output Voltage
2.3 V ≤ V
CC
≤ 3.6 V; I
OL
= 100 mA
V
CC
− 0.2
V
V
CC
= 2.3 V; I
OH
= −8 mA 1.8
V
CC
= 2.7 V; I
OH
= −12 mA 2.2
V
CC
= 3.0 V; I
OH
= −18 mA 2.4
V
CC
= 3.0 V; I
OH
= −24 mA 2.2
V
OL
LOW Level Output Voltage
2.3 V ≤ V
CC
≤ 3.6 V; I
OL
= 100 mA
0.2
V
V
CC
= 2.3 V; I
OL
= 8 mA 0.6
V
CC
= 2.7 V; I
OL
= 12 mA 0.4
V
CC
= 3.0 V; I
OL
= 16 mA 0.4
V
CC
= 3.0 V; I
OL
= 24 mA 0.55
I
OZ
3−State Output Current V
CC
= 3.6 V, V
IN
= V
IH
or V
IL
,
V
OUT
= 0 to 5.5 V
±5
mA
I
OFF
Power Off Leakage Current V
CC
= 0, V
IN
= 5.5 V or V
OUT
= 5.5 V 10
mA
I
IN
Input Leakage Current V
CC
= 3.6 V, V
IN
= 5.5 V or GND ±5
mA
I
CC
Quiescent Supply Current V
CC
= 3.6 V, V
IN
= 5.5 V or GND 10
mA
DI
CC
Increase in I
CC
per Input 2.3 ≤ V
CC
≤ 3.6 V; V
IH
= V
CC
− 0.6 V 500
mA
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
3. These values of V
I
are used to test DC electrical characteristics only.
AC CHARACTERISTICS (t
R
= t
F
= 2.5 ns; R
L
= 500 W)
Limits
T
A
= −55°C to +125°C
V
CC
= 3.0 V to 3.6 V V
CC
= 2.7 V V
CC
= 2.5 V ± 0.2
C
L
= 50 pF C
L
= 50 pF C
L
= 30 pF
Symbol Parameter Waveform Min Max Min Max Min Max Units
t
PLH
t
PHL
Propagation Delay
Input to Output
1 1.5
1.5
6.5
6.5
1.5
1.5
7.5
7.5
1.5
1.5
7.8
7.8
ns
t
PZH
t
PZL
Output Enable Time to
High and Low Level
2 1.5
1.5
8.0
8.0
1.5
1.5
9.0
9.0
1.5
1.5
10
10
ns
t
PHZ
t
PLZ
Output Disable Time From
High and Low Level
2 1.5
1.5
7.0
7.0
1.5
1.5
8.0
8.0
1.5
1.5
8.4
8.4
ns
t
OSHL
t
OSLH
Output−to−Output Skew
(Note 4)
1.0
1.0
ns
4. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH−to−LOW (t
OSHL
) or LOW−to−HIGH (t
OSLH
); parameter
guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol Characteristic Condition Min Typ Max Units
V
OLP
Dynamic LOW Peak Voltage (Note 5) V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
0.8
0.6
V
V
OLV
Dynamic LOW Valley Voltage (Note 5) V
CC
= 3.3 V, C
L
= 50 pF, V
IH
= 3.3 V, V
IL
= 0 V
V
CC
= 2.5 V, C
L
= 30 pF, V
IH
= 2.5 V, V
IL
= 0 V
−0.8
−0.6
V
5. Number of outputs defined as “n”. Measured with “n−1” outputs switching from HIGH−to−LOW or LOW−to−HIGH. The remaining output is
measured in the LOW state.
