74LCX138_06 Datasheet, PDF (8/17 Pages) STMicroelectronics – Low voltage CMOS 3 to 8 line decoder (Inverter) with 5V tolerant inputs

Electrical characteristics
74LCX138
Table 7. AC electrical characteristics
Test condition
Value
Symbol
Parameter
V_CC
C_L
R_L
t_s = t_r ^{-40 to 85 °C Unit}
(V)
(pF)
(Ω)
(ns)
Min Max
t_PLH t_PHL
Propagation delay
time
2.7
3.0 to 3.6
50
500
7.9
2.5
ns
1.5 6.7
Output enable
2.7
6.4
t_PZL t_PZH time to HIGH and
50
500
2.5
ns
LOW level
3.0 to 3.6
1.5 5.8
Output disable
2.7
7.4
t_PLZ t_PHZ time to HIGH and
50
500
2.5
ns
LOW level
3.0 to 3.6
1.5 6.5
t_OSLH
t_OSHL
Output to output
skew time ^{(1) (2)}
3.0 to 3.6
50
500
2.5
1.0 ns
1. Skew is defined as the absolute value of the difference between the actual propagation delay for any two
outputs of the same device switching in the same direction, either HIGH or LOW (t_OSLH = | t_PLHm - t_PLHn|,
t_OSHL = | t_PHLm - t_PHLn|)
2. Parameter guaranteed by design
Table 8. Capacitive characteristics
Test condition
Value
Symbol
Parameter
C_IN Input capacitance
C_PD
Power dissipation
capacitance ⁽¹⁾
V_CC
T_A = 25 °C
Unit
(V)
Min Typ Max
3.3
V_IN = 0 to V_CC
6
pF
3.3
f_IN = 10MHz
V_IN = 0 or V_CC
42
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 x V_CC x f_IN + I_CC
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