©2001 Fairchild Semiconductor Corporation www.fairchildsemi.com
74LCX27 Rev. 1.3.0 4
74LCX27 — Low Voltage Triple 3-Input NOR Gate with 5V Tolerant Inputs
DC Electrical Characteristics
AC Electrical Characteristics
Note:
3. 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
).
Symbol Parameter V
CC
(V) Conditions
T
A
=
–40°C to +85°C
UnitsMin. Max.
V
IH
HIGH Level Input Voltage 2.3–2.7 1.7 V
2.7–3.6 2.0
V
IL
LOW Level Input Voltage 2.3–2.7 0.7 V
2.7–3.6 0.8
V
OH
HIGH Level Output Voltage 2.3–3.6 I
OH
=
–100µA V
CC
– 0.2 V
2.3 I
OH
=
–8mA 1.8
2.7 I
OH
=
–12mA 2.2
3.0 I
OH
=
–18mA 2.4
I
OH
=
–24mA 2.2
V
OL
LOW Level Output Voltage 2.3–3.6 I
OL
=
100µA 0.2 V
2.3 I
OL
=
8mA 0.6
2.7 I
OL
=
12mA 0.4
3.0 I
OL
=
16mA 0.4
I
OL
=
24mA 0.55
I
I
Input Leakage Current 2.3–3.6 0
≤
V
I
≤
5.5V ±5.0 µA
I
OFF
Power-Off Leakage Current 0 V
I
or V
O
= 5.5V 10 µA
I
CC
Quiescent Supply Current 2.3–3.6 V
I
= V
CC
or GND 10 µA
3.6V ≤ V
I
≤ 5.5V ±10
∆I
CC
Increase in I
CC
per Input 2.3–3.6 V
IH
= V
CC
– 0.6V 500 µA
Symbol Parameter
T
A
= –40°C to +85°C, R
L
= 500Ω
Units
V
CC
= 3.3V ± 0.3V,
C
L
= 50pF
V
CC
= 2.7V,
C
L
= 50pF
V
CC
= 2.5V ± 0.2V,
C
L
= 30pF
Min. Max. Min. Max. Min. Max.
t
PHL
, t
PLH
Propagation Delay 1.5 4.9 1.5 5.8 1.5 5.9 ns
t
OSHL
, t
OSLH
Output to Output Skew
(3)
1.0 ns
