74lcx138 STMicroelectronics, 74lcx138 Datasheet - Page 8

• Manufacturer Part Number: 74lcx138
• Description: Low Voltage Cmos 3 To 8 Line Decoder Inv. With 5v Tolerant Inputs
• Manufacturer: STMicroelectronics

Electrical characteristics
8/17
Table 7. AC electrical characteristics
1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
2. Parameter guaranteed by design
Table 8. Capacitive characteristics
1. C
t
t
t
Symbol
Symbol
PLH
PZL
PLZ
t
t
C
outputs of the same device switching in the same direction, either HIGH or LOW (t
t
operating current consumption without load. (Refer to Test Circuit). Average operating current can be
obtained by the following equation. I
OSLH
OSHL
C
OSHL
PD
PD
IN
t
t
t
PZH
PHZ
PHL
is defined as the value of the IC’s internal equivalent capacitance which is calculated from the
= | t
Input capacitance
Power dissipation
capacitance
Propagation delay
time
Output enable
time to HIGH and
LOW level
Output disable
time to HIGH and
LOW level
Output to output
skew time
PHLm
Parameter
- t
PHLn
Parameter
(1) (2)
|)
(1)
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
3.0 to 3.6
V
CC(opr)
2.7
2.7
2.7
(V)
CC
= C
V
(V)
3.3
3.3
CC
PD
Test condition
(pF)
Test condition
C
x V
50
50
50
50
L
CC
V
V
x f
f
IN
IN
IN
IN
= 0 or V
= 0 to V
= 10MHz
500
500
500
500
+ I
(Ω)
R
L
CC
CC
CC
t
s
(ns)
2.5
2.5
2.5
2.5
= t
Min
r
OSLH
T
A
Min
-40 to 85 °C
1.5
1.5
1.5
Value
= 25 °C
Typ
42
6
= | t
Value
PLHm
Max
7.9
6.7
6.4
5.8
7.4
6.5
1.0
Max
74LCX138
- t
PLHn
Unit
Unit
|,
ns
ns
ns
ns
pF
pF